Hans Coler invention part 1/3
B.I.O.S. FINAL REPORT NO.1043
Item No. 31.
THE INVENTION OF HANS COLER, RELATING TO AN ALLEGED
NEW SOURCE OF POWER
Reported by R. Hurst, M. of S.
B.I.O.S.Trip No. 2394
BIOS Target Number: C31/4799.
BRITISH INTELLIGENCE OBJECTIVES SUB-COMMITTEE,
32, Bryanstone Square, London, W.1.
TABLE OF CONTENTS
I. Object of Visit and Summary ........................... 1
II. Historical Notes
1. The "Magnetstromapparat"...... 1
2. The "Stromerzeuger".................. 2
1. Interrogation of H.Coler............. 3
2. Interrogation of F.Modersohn.. 4
3. Construction and Testing of
the "Magnetstromapparat"........ 5
IV. Conclusion............................................. 6
Appendix I Details of Stromerzeuger......................... 7
II Report by Professor Kloss.................... 9
III Report by Professor Schumann............. 15
IV Report by Dr. Frohlich and Coler
to O.K.M............................................ 20
V Report by Coler on Frohlich´s
Figures 1 - 4
Personnel of Team
R. Hurst, Ministry of Supply
Captain R.Sandberg, Norwegian Army
The Invention of Hans Coler relating to an
alleged new source of power
I. OBJECT OF VISIT AND SUMMARY
Coler is the inventor of two devices by which it is
alleged electrical energy may be derived without a chemical
or mechanical source of power. Since an official interest
was taken in his inventions by the German Admiralty it was
felt that investigation was warranted, although normally it
would be considered that such a claim could only be fraudulent.
Acccordingly Coler was visited and interrogated. He
proved to be co-operative and willing to disclose all details
of his devices, and consented to build up and put into
operation a small model of the so-called "Magnetstromapparat"
using material supplied to him by us, and working only in
our presence. With this device, consisting only of
permanent magnets, copper coils, and condensers in a static
arrangement he showed that he could obtain a tension of 450
millivolts for a period of some hours: and in a repetition
of the experiment the next day 60 millivolts was recorded
for a short period. The apparatus has ben brought back
and is now being further investigated.
Coler also discussed another device called the "Stromer-
zeuger", from which he claimed that with an input of few
watts from a dry battery an output of 6 kilowatts could be
obtained indefinitely. No example of this apparatus exists
today, but Coler expressed his willingness to construct it,
given the materials, the time required being about three
Opportunity was taken to interrogate Dr. F. Modersohn
who had been associated with Coler for ten years and had
provided financial backing. He corroborated Coler´s story
in every detail.
Neither Coler nor Modersohn were able to give any theory
to account for the working of these devices, using acceptable
II HISTORICAL NOTES
1. The "Magnetstromapparat"
This device consists of six permanent magnets wound
in a special way so that the circuit includes the
magnet itself as well as the winding,
These six magnet-coils are arranged in a hexagon and
connected as shown in the diagram (Figs.
in a circuit which includes two small condensers, a
switch, and a pair of solenoidal coils, one sliding
inside the other.
To bring the device into operation
the switch is left open, the magnets are moved
slightly apart, and the sliding coil set into various
positions, with a wait of several minutes between
The magnets are then separated still
further, and the coils moved again. This process is
repeated until at a critical separation of the magnets
an indication appears on the voltmeter.
The switch is now closed, and the procedure continued
more slowly. The tension then builds up gradually to
a maximum, and should then remain indefinitely.
The greatest tension obtained was stated to be 12 volts.
The "Magnetstromapparat" was developed by Coler
and von Unruh (now dead) early in 1933, and they were
later assisted by Franz Haid of Siemens-Schukert, who
built him self a model which worked in December 1933.
This was seen by Dr. Kurt Mie of Berlin Technische
Hochschule and Herr Fehr (Haber´s assistent at the
K.W.I.), who reported that the device apperently worked,
and that they could detect no fraud.
One model is said to have worked for 3 months locked
in a room in the Norwegian Legation in Berlin in 1933.
No further work appears to have been done on this system
since that date.
2. The "Stromerzeuger"
This device consists of an arrangement of magnets,
flat coils, and copper plates, with a primary circuit
energised by a small battery.
The output from the secondary was used to light a bank
of lamps and was claimed to be many times the orginal
input, and to continue indefinitely.
Details of the circut, and a theory as to its mode of
operation were given (summarized in Appendix I).
In 1925 Coler showed a small (10-watt) version to
Prof. Kloss (Berlin), who asked the Government to give
it a thorough investigation, but this was refused, as
was also a patent, on the grounds that it was a
"perpetual motion machine". This version was also
seen by Profs. Schumann (Munich), Bragstad (Trondheim)
and Knudsen (Copenhagen).
Reports by Kloss and Schumann are translated in
Appendics II and III.
In 1933 Coler and von Unruh made up a slightly
larger model with an output of 70 watts. This was
demonstrated to Dr. F. Modersohn, who obtained from
Schumann and Kloss confirmation of their tests in 1926.
Modershon then consented to back the invention, and
formed a company (Coler G.m.b.h.) to continue the
At the same time a Norweigan group had
been giving financial support to Coler, and these two
Modersohn´s connection with Rhein-
metall Borsig, and hence with the official Hermann
Goering combine gave him an advantage in this. Coler
then in 1937 built for the Company a lager version
with an output of six kilowatts.
In 1943 Modersohn brought the device to the
attention of the Research Department of the O.K.M.
The investigation was placed under direction of
Oberbaurat Seysen, who sent Dr. H. Frolich to work
with Coler from 1.4.43 to 25.9.43.
Frohlich was convinced of the reality of the
phenomena, and set about investigating the
fundamentals of the device.
He apperently concentrated on a study of the energy
changes which occur on the opening and closing of
At the end of the period he was
transferred to B.M.W. to work on aerodynamic problems
and is now working in Moscow.
In 1944 a contract was arranged by the O.K.M. with
Continental Metall A.G. for further development, but
this was never carried out owing to the state of the
In 1945 the apparatus was destroyed by a
bomb, in Kolberg, whither Coler had evacuated. Since
that time Coler had been employed, sometimes as an
engineer and sometimes as alabourer.
Modersohn had severed his connection with Rheinmetall
Borsig, of which he had been director, and was working
for the russian authorities as a consultant in chemical
1. Interrogation of Coler
Coler was questioned first about the history of his
inventions, when the details above were given.
He was then questioned about the theory of the
devices, but he was unable to give any coherent
suggestions as to the mechanism. He stated that
his researches (apparently conducted with crude
apparatus) into the nature of magnetism had lead him
to conclude that ferro-magnetism was an oscillating
phenomenon, of frequency about 180 kilohertz.
This oscillaation took place in the magnetic circuit
of the apparatus, and induced in the electrical circuit
oscillations the frequency which of course depended
on the values of the components used.
These two phenomena interacted, and gradually built up
As the mechanism was not understood the proper
arrangement could not be worked out, but had
been arrived at by experiment, and the apparatus had
to be brought into adjustment by similar trial and
Coler stated that the strength of the magnets did not
decrease during use of the apparatus;
and suggested that he was tapping a new sort of energy
hitherto unknow, -"Raumenergie" (Space-energy).
Coler gave a resume of the work done by Dr. Frohlich
for the O.K.M., and produced a copy of Frohlich´s
report, written jointly with himself (translation
reproduced as Appendix IV) and a report of his own
(part of which is given in Appendix V).
Coler was next asked if he would consent to
build models of these devices if material was made
available. He agreed that he could do this, and
stated that it would take one week to construct a
"Magnetstromapparat", and a month to construct a
Accordingly we supplied the magnets, condensers and
copper wire needed for the former, and Coler
proceeded to build an apparatus as discussed in
Section 3. A list of material required for the
"Stromerzeuger" was drawn up by Coler.
2. Interrogation of Dr. F. Modersohn
Modersohn was questioned about the history of
these devices, with which he had been concerned
financially, and corroborated the details given by Coler.
He stated that he had at first disbelieved Coler´s claims,
but had taken great precautions to eliminate fraud.
He had seen the 70 watt "Stromerzeuger" working on a number
of occasions, and had taken it while working from one
room to another. All parts were visible and nothing
was hidden. As he was himself not expert he had tried
to get experts to examine it thoroughly, but reputable
scientists either refused to have anything to do with
it at all , or else were more concerned to find a fraud
than to see how it worked.
The exception was Dr. Frohlich, who was convinced of
the reality of the effect, and who also believed that
the secret was to be found in a analysis of the energy
changes in the special inductive circuit used.
He had made experiments to test his ideas, but
Modersohn denied knowledge of the results.
Modersohn was extremly methodical, and showed his
files on the subject: these contained copies
of all letters and reports concerning the device, since
3. Construction and Testing of the "Magnetstromapparat"
In our presence and with material supplied by us
(some brought from England and the rest bought locally)
Coller built an apparatus as shown in Figs.
It is to be noted that some magnets are wound in a
clockwise direction looking at the N pole (called left)
and others in an anti-clockwise direction (called right).
The magnets were selected to be as nearly equal in
strength as possible, and the resistance of the magnet-
coil combination was checked after winding to see that
this also was uniform (about .33 ohm).
The physical arrangement was as shown in Fig.
2, in a breadboard
style. Measurements of voltage and current across
A-B were made with a Mavometer. A mechanical arrange-
ment of sliders and cranks for separating the magnets
evenly all round was made up.
On 1.7.46 experiments were being continued after
three days of fruitless adjusting, and when the magnets
were at a separation of about 7 mm. the first small
deflection was noted (about 9 a.m.).
The switch was closed and by slow adjustment of the
sliding coil, and by increasing the separation of the
magnets to just over 8 mm, by 11 a.m. the tension was raised to 250
millivolts and by 12.30 p.m. it was 450 millivolts.
This was maintained for another 3 hours when a soldered
tag became disconnected, and the meter slowely dropped
back to zero. Soldering up the broken connection did
not restore the tensinon. The magnets were closed up
and left overnight and the same procedure for finding
the adjustment was repeated on 2.7.46. After about
three hours a deflection of 60 millivolts was obtained;
this was maintained for more then 30 minutes, but then
decresed to zero when further adjustments were tried.
During all this work the model was completely open,
and nothing could be hidden in it. The breadboard and
meter could be picked up and moved round the room, tilted,
or turned, without effect.
The apparatus would appear to be too crude to act as
as a reciver of broadcast energy, or to operate by
induction from the mains (the nearest cable being at least
6 feet away), and the result must for the moment be
regarded as inexplicable.
- 1. It was judged that Coler was an honest experimenter and
not a fraud, and due respect must be paid to the judgment of
Frohlich in the matter as deduced from his report to Seysen.
- 2. The result obtained was genuine in so far as could be
tested with the facilities available, but no attempt has yet
been made to find a explanation of the phenomen.
- 3. It is felt that further investigation by an expert in
electromagnetic theory is warranted, and that Coler´s offer
to construct a model of the "Stromerzeuger" should be taken
Summary account of the "Stromerzeuger"
- 1. The basic principle is that an electron is to be
regarded not only as a negatively charged particle but
also as a South magnetic pole.
The basic element is that of an open secondery
circuit, capacity loaded, inductively coupled to a primary
circuit. The noval feature is that the capacities are
connected to the secondary core through permanent magnets,
It is claimed that, on switching on the primary circuit,
"separation of charges" takes place, i.e M1 becomes +
vely charged and M2 - vely charged, and that these charges
are "magnetically polorised" when they formed, owing
to the presence of the magnets.
On switching off the primary circuit a "reversing current"
flows in the secondery, but the magnets "do not exert a
polarising effect on this reversal"
- 2. Two of these basic elements are now placed together
making a double system or stage with the plates close
together in parallel planes as shown:-
The secondary windings are both exactly equal and wound
in a direction such that on switching on the primary coil
the electrons in the secondary coil flow from P1 to P2
and F1 to F2.
It is then stated that system F1 - F2 merley has an
inducing effect, and the useful current comes into
existence in the system P1 -P2.
- 3. A single stage cannot be effective but two stages
connected so that the numbers of effective North and
South poles are aqual will provide a basic working
More double stages can then be added to provide
- 4. It is then stated that as well as the normal
electrons flowing from the battery and induction when the
circuit is opened or closed "space electrons" flow from
"repelling spaces" to "attracting spaces" between the
plates, but this theory I was unable to follow any
Translation of Report by Professor M, Kloss (Berlin)
on test on the apparatus, constructed by Captain
Coler (dated 4th March, 1926)
On the 3rd of March I have on request inspected the apparatus
constructed by Captain Coler, and I undertook some tests regarding
its efficiency. Professor Dr. R. Franke from the Technical
College of Berlin was present at these tests.
The apparatus, in its construction already known to me from a
previous inspection, consists of:
- a double-row system of copper-plates,
- a double-row system of flat spools, and
- a system of electro-magnets,
to whose cores silver wires are attached and through which branch
currents of the plate-system are conducted. For each of the three
systems a three part accumulator-battery of 6 volts and 6.5 ampere
hours capacity is provided.
The plate-circuit and the spool-circuit are parallel so that the
two batteries appertaining there-to can also be replaced by a
This was ascertained towards the end of the tests by switching
off the one battery while the apparatus was working.
When asked why two batteries were used at all, Captian Coler
declared that for starting the apparatus a double battery is
necessary to get a second charge -impetus after exciting with the
one battery, and this for releasing the peculiar character of the
A test made towards the finish of a series of trails confirmed
this assertion in as much as the mechanism could not be
started with the single battery, on the contrary the "adjustment"
of the mechanism got disturbed.
Current-indicatores are built into each of the three circuits
mentioned, as well as volt-meters, behind some switch-resistances
necessary for the "adjustment".
Between the open ends of the two plate and spool-systems there
are therminal clamps for the effective circuit for whose loading
three bulbs of 8 volts are provided.
The apparatus was then put into action and above all the load
was tested with 2 lamps, 3 lamps and running light.
There-upon and by means of precision-instrument
(continuos current type)' Siemens & Halske Nr. 423820 the
indications of the built-in instruments were controlled by
switching on the mentioned precision-instrument in turn to the
single circuits, that is direct to the one terminal clamp
of the battery, in order to ascertian if perhaps through
any by-connections with the batteries, not conspicuous at
once, more current might be received than the built -in
instruments were showing.
The tests showed a sufficient conformity within the bounds of
Finally the same instrument was switched on also to the
effect circuit, whereby some greater differences with the
instruments built into this circuit were shown; on the other
hand, however, not such differences as to alter fundamentally
the total result in any way.
In order to find out besides, whether the output current
might be identical with a wave-current overlapping
continuous current, the last control test was repeated
by using a hotwire-instrument furnished by me, make of
Hartmann & Braun, Nr. 254159.
In case there would have been such wave-currents, the hotwire-
instrument would have had to indicate a bigger current than was
shown by the continuous-current instrument.
In reality, however, a somewhat smaller current was found when employing
the hotwire-instrument. This may be explained by the fact
that the inner resistance of the instrument is about 10 times
greater than that of the continuous-current instrument, so that
when switching on the hotwire-instrument the load of the
apparatus was somewhat lessened.
The difference between 3.08 ampere measured with the
continuous-current instrument as compared with 2.95 ampere
measured with the hotwire-instrument is easily explained
when taking into account the divergences
of the two instrument-resistances.
Therefore one can infer from this test that in the
load-circuit we have to deal with real continuous current.
The results of the tests are compiled in the annexed table.
The figures show very well that the consumption of energy
in the exernal circuit is greater than the energy taken from
According to the curcuit, produced by Captain
Coler, which within this short time I could not check in all
its parts, the magnet-exciting circuit is fed by special
battery, completely separated from the other two circuits.
Consequently, a direct comparison of efficiency and consumption
of the apparatus would mean that only the sum of current of the
plate circuit and of the spool circuit would count.
After the established estimates with my own instrument and on a load of
three bulbs, there was resulting a current from the two mentioned
batteries of 0.215 + 0.070 = 0.285 ampere.
At the same time the three bulbs consumed ca. 3.7 ampere,
according to the built-in instruments, which is about 0.2 ampere
too much as was proved later on by a control of this instrument,
so that the real consumption has been about 3.5 ampere at a
tension of about 2.3 volt.
The reception of current from the two batteries in this
case consequently was 1.7 watt while the consumption of the
Hans Coler invention part 2/3
bulbs amounted to about 8 watt. Especially striking in
this connection is the considerably higher current-power in
the bulb-circuit being about 12 times bigger than the current
coming from the two batteries.
We have also absolutely made sure that from the batteries
no other conducters led to the apparatus than those into which
my instrument was built-in.
The fact that an increase of power from the battery to the terminal
clamps of the effective circuit in the plate-system take place,
could, indeed, not be tested on different parts of the apparatus
by a direct measuring of the power itself, because Mr. Coler
declared that when switching on an instrument in the interior of
the system, probably the "adjustment" would be disturbed.
I have therefore tested the decrease of tension in the
single plates on a load of three lamps by means of a millivolt-
meter, make of Hartmann & Braun, Nr. 462375, in order to get at
least in an indirect way an explanation for the increase of
This examination showed a remarkable increase of
tension-losses with a distinct maximum on the third-last plate
of the one row. These estimates too are compiled in the table
at the end of this judgment.
The result of the investigation showed an astonishing
working of the apparatus, which, without further researches
cannot be explained or compared with the hitherto known
Regarding the Cause of the observed characteristics,
especially the solution of the question, where the energy in
the apparatus orginates, no explanation can be given yet,
after the short and simple tests.
Solely the conjecture can be expressed that the magnet-
system is the source of the energy. If therefore seems
desirable to clear this point by further thorough and systematic
For this purpose the proposition of Mr. Coler to construct a
bigger apparatus is very sensible, an apparatus,
into which from the beginning measuring-instuments should be
built in the respective parts of the single circuits in order
to enable the "adjustment" of the apparatus including these
A judgment for the possible utilization of
observant in the apparatus, from the economical point of
view, I am, of course, not able to pass on after these short
This question could only be answered after some lengthened
and permanent tests, by which should be established
what productiveness the source of energy, existent in the
apparatus will show, especially if the magnets, in case they
are the supports of the energy-source would wear out after
some time, and at what expense each time they could be
replaced by new ones.
Above all, however, it appears important that the part
or parts of the apparatus, being possibly responsible for
causing the observed phenomena, should be taken out in a way
as simply as possible and be submitted to an examination in
Before finishing this, I wish to say that the results of
the tests are put at the disposal of Captain Coler for which
reason I enclose a copy herewith.
I should like to ask, however, the gentlemen in question
not to mention my name and that of Professor Franke nor
divulge the results of our tests without our express consent,
or to make them known publicly and above all not in the press.
Results of Measuring
3rd March, 1926
Nr. Test with Charge Magnet Plate Spool External
instrument circuit circuit circuit circuit
Amp. Volt Amp. Volt Amp. Volt Amp. Volt
1 built-in - 0.21 0.5 - 6,4 - 6.3 - 6.0
2 idem 2 bulbs 0.21 0.5 0.16 4.7 0.06 4.3 3.1 3.5
3 idem 3 bulbs 0.21 0.5 0.22 4.0 0.075 3.75 3.7 3.0
Control of the buildt-in instruments: Of the battery
4/5 built-in 3 bulbs 0.215 4.0 3.7 3.0
6/7 built-in 3 bulbs 0.08 3.4 3.7 3.0
8/9 built-in 0.21 0.5
The three built-in instruments show with sufficient
precision the series of the three battery circuits
Control of the instruments in the external circuit
10 built-in 3.3 3.0
11 S&H423820 3 bulbs 3.08 2.30
12 S&H254159 2.95
13 built-in 2 bulbs 3.15
14 S&H423820 3.15
15 built-in 1 bulbs 4.1
16 S&H423820 4.45
From the buildt-in tension meter of the external circuit
estimations below 3 volt could not be read any more.
When slightly over 3 volt the instrument indicates correctly,
when over 5 volt, the indication is somewhat too low.
The built-in current indicator of the external circuit
points somewhat too high.
The control-instrument S.& H. 423820 is a precision
continuous current-instrument (Millivoltmeter) for current and
tension measurings. The control instrument H. & B.243159 is
Translation of a report by Professor W.O,Schumann
(Munich) on the examination of the apparatus of
Mr. Coler in Berlin on the 19th and 20th March
1926 (dated 3rd April, 1926)
The apparatus in question principally consists of two
parallel connected spools, which being bifilarly wound in a
special way, are magnetically linked together.
One of these spools is composed of copper sheets
( the spool is called the plate spool), the other one of
a number of thin parallel connected isolated wires
(called: spool winding), running parallel at small intervals
to the plates.
Both spools can be fed by separate batteries; at least two
batteries are necessary to put the spools at work.
The spools are arranged in two halves each, according to
the bifilar winding system.
To the starting points the batteries are attached, to the
parallel connected ends the current-receivers.
Besides, inter-communications are connected between parallel
windings of the two halves of the plate spool which contain
iron rods with silver connections.
These rods are magnetised by a special battery through
applied windings (called: exciter windings).
According to the statement of the inventor, the production
of energy principally takes place in these iron rods, and the
winding of the spools plays an essential part in it.
As far as it was possible I convinced myself of the
conformity of the circuit with the mechanism.
The exciter winding is electrically completely separated
from the other windings which was proved when testing the
apparatus while being devoid of tension, as well as when
testing it while being at work with the aid of an Ohmmeter
and a Millivoltmeter.
In order to ascertain possibly concealed sources, the
apparatus was searched with a millivoltmeter, without using any
No effect was perceptible.
Besides the apparatus was carried from the one room through
a corridor to another one in the establishment to exclude
the possibility of any secret connection to the mains.
Installed in the apparatus were three current meter for
the currents from the three batteries, and furthermore current
and volt meters of the soft iron type for the current receivers.
One and two bulbs respectively were employed for this purpose.
Besides there were at disposal one precision milliameter of the
S. & H. turn spool type, also employable as ammeter and voltmeter
(called: Dr. Sp.C.), and a turn spool millivoltmeter of the
A.E.G., an ordinary laboratory instrument, also employable as
a voltmeter, (called: Dr. Sp. A.E.G. C.).
While the apparatus fed two bulbs, the current delivery
of the three current-supplying batteries was measured directly
at the terminal clamps. The results are as follows:
l. current of the plate battery 48 mA )
2. current of the spool battery 39 mA ) Dr. Sp. S. &
) H. C.
3. current of the exciter battery 170 mA )
The indications of the built-in instruments were in
unison with the statements of the S. & H. instrument.
The total capacity of the batteries of three elements each:
0.257 x 6 - 1.542 watt, (the tension of the batteries in
reality being below 6 volt).
The possible capacity of the two bulbs according to the
built-in soft-iron instruments was 3A x 3.5 v.,
that is 10.5 watt which means the 6.7 fold of the
Thereafter only one bulb was connected, and a seond one,
exactly of the same type, was regulated with a special
accumulator battery to get the same light.
All currents were measured with the "Dr. Sp. S. & H. C.",
all tensions with the "Dr. Sp. S. A.E.G. C." and not with
the built-in instruments.
1. current of the plate battery 28 mA
2. current of the spool circuit battery 23.5 mA
3. current of the exciter battery 180 mA
That means, if reckoned with a 6 volt battery tension, 6 x
0.232 - 1.392 watt.
The possible capacity of a bulb, fed by a special battery,
and showing the same lightpower was 4.5 volt x 1.5 Am - 6.75 watt.
Proportion of both efficiencies ca. 4.85.
Both instruments used for testing (measuring) from S. & H.
and from the A.E.G. were then compared with each other by a
current-voltmeter, the highest possible deviation being less
than 10% which can therefore scarcely influence the result.
The apparatus, according to the statement of the inventor,
is adapted now for current increase. The bulb-tension of
3-5 volt is less than the tension of the feeding batteries.
By changing over in the interior it would also be possible to
use it for an increase of tension.
Then there was a test with the aid of the Dr. Sp. Milli-
voltmeter from the A.E.G. to try the decrease of tension in the
single winding halves of the plate spool on the right.as well
as on the left side of the mecanism. (The form of the spool
is that of a long small rectangle).
Tensions in Millivolt: Winding from the tap downward:
Right Side Left Side
1. - 2. 0.24 l. 0.34 2, -
3. - 4. 2.6 3. 2.8 4. -
5. 8.4 6. 24 5. 12.4 6. 22
7. 22 8. 24.6 7. 28 8. 100-140
9. 26 10. 25 9. 46 10. 30
The tensions are distributed very unequally which must be due
to current increases and decreases through the iron-cores.
Further measurements on the single parts could not be
carried through for the reason of getting impeded by the built-
in parts in the apparatus.
Any variations of the regulation-resistances were also not
undertaken, because the inventor stated that the apparatus in
its installation was very sensitive, especially with regard
to the magnetic conditions of the iron-cores, and that a
wrong treatment would cause interferences which would
be wearisome and very difficult to be eliminated.
The next day I got a Hotwire-voltmeter "H. & B" (called:
H. Dr. TH), and further a precision milliameter "S & H." (called:
Dr. Sp. TH) at the Technical High School of Charlottenburg.
With these instruments and those of the previous day the following
tests were made:
1. Plate circuit 28 mA Dr. Sp. T H
Lamp current 1.52 A Dr. Sp. S. & H. C.
1.60 A H Dr. T H
1.3-1.4 Built-in soft iron
Lamp tension 4.05 V H Dr. T H
Lamp tension 4 V Built-in soft iron
2. Spool circuit 28.5-30 mA Dr. Sp T H
Lamp current 1.47 A Dr. Sp S. & H. C
1.56 A HDTH
Lamp tension 3.8 V H Dr. T H
3. Exoiter circuit 0.173 A Dr. Sp S. & H. C
Lamp current 1.5 A H Dr. T H
Lamp tension 3.75-4 V H Dr. T H
Spool circuit 30-30.5 mA Dr. Sp T H
Once again a comparison of capacity was carried through
by using an equa1amp to that in the apparatus with an
accumulator, and bringing it to the same brightness, as
judged by the eye.
Lamp in accumulator circuit:
tension 4 V Dr Sp S. & H. C
3.3 V Dr Sp A.E.G. C
current 1.5 A Dr Sp S. & H. C
Lamp in apparatus:
tension 3.85-4.0 V H Dr. T H
current 1.59 H Dr. T H
Current in spool circuit 27-28.5 mA Dr. Sp T H
Thereafter the instruments with the measured current -
and tension - figures were compared with each other:
1. Tensionmeter parallel on two accumulators:
Dr. Sp A.E.G. C 3.2 V
H Dr. T H 3.8 V
Dr. Sp S. & H. C 4.2-4.3 V
2. Voltaelectrometer in line:
H Dr. T H 1.47 A
Dr. Sp S. & H. C 1.46-1.47
Even when taking into account the errors of the
instruments, the resulting multiplication of energy, in
principle, does not undergo any alteration through the
Judging from the conformity of the hotwire - and turnspool
instruments in the lamp circuit, the inference
is to be drawn that principally it is continuous current
one has to deal with.
A test of current from the batteries by way of hotwire
measurement was not possible.
As a striking fact it should be mentioned that the spool
circuit having been at first always switched on alone, received
a current of 104 mA.
As soon as plates and exciter circuit additionally and
simultaneously were switched on, as, according to the inventor,
the apparatus demands it, the current in the
spool circuit comes down to about 27 mA.
A definite judgment about the apparatus must be reserved
by me until all parts have been singly tested, and until
variations in the connections in the load and c have been undertaken.
After the present examination, carried through as care-
fully as the limited possibilities of experimentation
permitted, I must surmise that we have to face the exploitation
of a new source energy whose further developments can be
of an immense importance.
The apparatus was visible and accessible in all its essential parts.
The inventor agreed quite willingly to each trial in so far as,
according to his statement, no harm could be done to the working
of the apparatus.
I do not believe in a deception. I deem it expedient to
put the apparatus to a further test, and I believe that a
further development of the apparatus and an assistance, given
to the inventor, will prove justified and of great importance.
Report of Examination on Coler Apparatus
Time; 1.4.43 to 25.9.43
Place: Research Department of the Admiralty (OKM), Berlin, Wannsee
Time: l.4.43 to 30.6.43
Place: Physical Institute of the Technical University of Berlin
Time: 1.7.43 to 25.9.43
Report by Hans Coler and Dr. Heinz Frohlich
Some years ago an apparatus (the Coler apparatus) was empirically developed,
which according to a series of reports
by well known scientists and practical engineers, was able to deliver a considerably
higher electrical output than the input necessary to excite the electromagnetic fields of
Due to the lack of sufficient knowledge of the complicated
activity within the apparatus, and of the impossibility of
explaining this in known terms, the success in
starting the apparatus depended upon happy accident.
With the support of the OKM an attempt was made to examine and
measure the activities in the Coler apparatus.
Due to lack of sufficient technical and physical means, we did
not at first succeed in starting it.
This work, however, led to valuable knowledge and information.
It is therefore necessary, through a systematic basic
research, to transfer the adjustment and other necesary
procedure for starting the apparatus, from the domain of
accident into a practical experimental procedure which is at
any time reproducible.
During the years 1923 to 1926 the undersigned, Captain
Hans Coler, basing his work on lay theories of
electromagnetic and inductive activities, has developed an
apparatus for generating electrical energy, wich delivered
a considerably higher electrical output than was necessary
to excite the
Hans Coler invention part 3/3
primary fields of the apparatus. This development was
carried out merely empirically and due to the lay procedure without recording
measurements or making diagrams.
This apparatus was the subject of numerous examinations
by scientists and practical engineers, who in their reports,
almost without exception, had to admit an energy surplus or
energy multiplication without being able to explain the
process by present knowledge.
The inventor also could not give an explanation due to lack
of sufticient knowledge of the activities in the apparatus.
(See reports by Professors Kloss and Schumann on
record at the OKM).
Due to unplesant differences with the financiers,
mostly foreigners, and a nervous breakdown of Coler
because of these, the apparatus and original theories were lost.
Upon resumption of the experiments at a later date the effect
was occasionally successfully reproduced, (see report by
Dr. Modersohn cocerning events at New Year 1936-7) which,
however, evidentially due to disturbance of the adjustments,
could not be maintained because sufficient measurements were
The outbreak of war then put a temporary end to the exprimental work.
2. Intervention of the OKM
In 1942 Coler and Dr. Modersohn made an application to the
OKM to supply them with materials for further work, hoping
that by simple technical means, the apparatus could be made to work.
Their aim was to produce a working apparatus, which could
be shown to the Fuhrer of Germany, leaving the measurement
of all activities of the apparatus to a later date.
The OKM approved the aplication and sent sufficient
materials to build the apparatus and lent the inventor
ordinary ampere-meters, voltmeters, and necessary tools.
It was found, however that due to the overload of work upon
them at this time, their spare time work was not sufficient
to secure quick results.
The OKM therefore procured their release from other work,
to allow a more intensive, and, due to the cooperation of Dr.
Frohlich, who had experience in physical measurements.,
a more scientific approach.
The newly developed apparatus could not be made to work,
however, because of the lack of thorough knowledge of
the activities in the apparatus which now appeared to be
complicated. Valuable knowledge and promising signs,
however, were obtained.
3. Short description of the apparatus
The apparatus consists of three principle circuits which
are inter-wound and intercoupled (verkoppelt) in a
peculiar way. Some of these are divided again into single
subsidiary circuits which evidently have all to be brought
into resonance with one another.
The principle circuits (called the anchor) in which the energy
gain probably occurs, consists of metal plates between which
transformer coils are connected, the whole being connected to
one large plate coil (Plattenspule).
On each of the single windings on this is coupled a large flat
coil (Flachspule) (called field).
These flat coils are interwound in two groups,
these groups represent the turns of a transformer.
This couples, on one hand on the flat coils of the other
group (as secondary coils), and on the other hand on the
anchor-plate coil, which is placed between them.
The third electrically independent circuit (called the
directing circuit) (Steuerkreis) regulates this transference.
Figure 1 shows diagramatically and in plan these interwound
parts (anchor in red, field in green, directing circuit in blue).
Figure 2 the so called basic diagram, shows the connections
between these different parts. This basic diagram shows the
conditions necesary for self-interuption.
In consequence of this arrangement, different types of current
are created in different conductors (pulsed direct current,
alternating current, etc.)
The transformer coils, connected between the anchor plates,
are connected in a peculiar way through thin permanent
magnet rods. Their main object seems to be to pre-magnetize
the transformer cores, it is, however, very probable that they
are also connected with the Barckhausen effect, which will be
4. Experiments carried out
From the reflections which led to the diagram of the
apparatus described above, the reality of some physical effects
was assumed, which partly from the inventor himself, and
partly also from the scientists who had examined the working
apparatus, were stated as a possible or probable explanation
of the phenomenon observed.
As these hypotheses had not been examined by measurements,
it seemed suitable, for further development of the apparatus,
to clarify these questions by further expriment, so far as
was possible with the means at our disposal.
The expriments carried out are described below.
If a single layer solenoid is connected to a battery, a
current begins to flow at the moment of connection,
which is known to rise exponentially, untill it reaches
a constant maximum determined by the voltage of the
battery and resistance of the circuit.
Every point on the current/time curve corresponds
to a magnetic field, which is dependent upon the dimensions of
At the moment of connection the electrons do not begin to
flow at the same time in all parts of the coil, because
the electromagnetic wave (Storungwelle) travels with the
velocity of light.
The electromagnetic field at different parts of the coil
also builds up with a corresponding time difference.
Now in a right hand wound coil a north pole is produced at
the end where the current enters (the current direction
is taken now and hererafter to be the direction of flow
of the electrons, i.e. from negative to positive), in a left
hand coil a south pole is similarly produced.
In the first case the building up of the magnetic field
proceeds from the north pole to the south, in the second
case from the south to the north, or in other words:
The direction of the building up of the field is in one
case with the direction of flow of the field and in the
other against it.
- Question: Is the velocity of the building up
of the field different in these two cases, although the
data of the coils is the same except for the direction
of winding? This means, is there a difference in the
time in which the currents are reaching their maximum
If such an effect could be found, it must show itself in
one of the following ways:
(a) The coils must have different apparent resistances
(scheinwiderstand). By measurements of voltage and current
the apparent resistance of ten right-handed and ten
left-handed coils tested with a Philips-Schwebungs-Summer.
The apparent resistances were the same within an
experimental error of about ± 1%.
(b) Other conditions being the same the coils must
induce different potentials across a secndary coil,
when connected to a battery.
Measurements were made with a cathode ray
oscillograph from Siemens and Halske. The induced
potentials were the same. It can therefore be taken
as proved that no such effect exists.
Given a solenoid consisting of two windings, one
upon the other, of the same length and number of
turns, enclosing a soft iron cylindrical core.
Firmly attached to one end of the core is a
pre-magnetized steel rod. If an alternating current is
passed through one of these coils, acting as primary,
the residual magnetism of the steel rod is
strengthened during one half cycle, through the
magnetism induced in the core, during the other half
cycle it is weakened. If now the other winding
is connected in series with the pre-magnetized
steel rod - as secondary coil - in such a way that
the secondary current must pass through the magnet,
one half cycle of the secondary current must be more
or less subdued, in other words a rectifying effect
must be created. (It may be remebered that according
to measurement by Professors Kloss and Schumann a
high frequency pulsed direct current - about 180 Kc
- is flowing in the output resistance of
the apparatus, for the creation of which no
other explanation seems possible).
Unfortunately the testing of these effects could only
be made with tuned frequency (Tonfrequent) alternating
current, with the use of which no such phenomenon
could be seen when using measuring instruments and a
cathode ray oscillograph.
The question is open whether, and if so in what way,
an influence on the electron movement exists through the
oscillation of the magnet molecules by high frequency
alternating fields, especially of such an impulse-like
Previous measurements, from the year 1937, made by the
inventor and his assistant, Dipl. Ing. Rudolf Hingst,
had shown the following effect. Given two solenoids
each consisting of two coils one upon the other, of
the same length and number of turns, one winding of one
solenoid is connected in series with one winding of
the other, wound in the same sense, and an
intermittent direct current is passed through them.
The remaining windings, which, are to be considered as
secondary coils, are also connected in series but
wound in opposite sense to one another. The induced
secondary currents are therefore
similarly in opposition, and would, due to the equal
dimensions of the coils eliminate one another.
The measurements referred to above are said to have
given the result that in such a secondary circuit a
considerable direct current component exists which
can be strengthened by means which we shall not go
into here. And this strengthening to a degree such
that the "secondary direct current" is comparable
to the primary current.
Testing the results of these measurements, however,
did not confirm them.
Besides the above questions, uncertainty existed as
to what part the above described plate and flat coil
unit plays in the function of the apparatus, how
great is the mutual influence of the flat coils
upon one another?
Of the flat coils upon the plates? And finally of
the plates between them? As the plates are not only
charged as condensers, but also have directed
currents passing through them it had to be assumed
that their mutual influence not only consisted of
a condencer effect, but that they also created a
It must first be stated that the frequency of the
"Summer" at our disposal (0-12Kc) was not sufficient
to measure the mutual electromagnetic influence of
the plates, due to the low apparent resistance.
This examination should be carried out with high
frequency alternating current. It was, however,
possible by the use of a highly sensitive
oscillograph as a valve voltmeter to measure the
potential induced by the flat coils on the
individual plates, to discover the induction
currents in the plates, and also to determine
the value of the potential induced by the flat
coi1s on the plates in proportion to the currents
created in the plates from the current induced
in the anchor coils (the directing current was
used as a primary winding in these measurements,
being connected to the Schwebungs-Summer).
It appeared that the "Ankertrakte" AC or BD
(See Fig.1) are not all to be
considered as oscillating circuits, but that the
single group systems, consisting of plate - to
anchor coils - plate, already represent independent
oscillation circuits. According to this the apparatus
contained ten such oscillation circuits.
The individual frequency of these circuits and
possible differences existing between them could
unfortunately not be measured, because, as already
mentioned, up to now only tuned frequency for
excitation was at our disposal.
In order to make the apparatus work the harmony of
all oscillating circuits in their individual
frequencies would evidently be
necessary - at least within certain limits
determined by the suppression in question.
Such an adjustment can of course not be
secured by the means at our disposal at
The previous occasional success must be
considered as due to chance.
The mutual influence of the flat coils upon one
another could on the other hand easily be examined
because, despite the great distance between the
windings (25 mm), they have remarkably great
apparent resistance (about 200 ohms at 10 Kc).
It appeared that the power factor
(Ubertragungs-faktor) of both of the flat coils
wound 1 : 1, in consequence of their peculiar
interwinding (See Fig.
have the astonishingly high value of 0.85.
The value of the power factor was at a maximum at
10 Kc, at which frequency the most favourable
matching of the impedance of the Summer was obtained.
The assumption could easily be made that the power
factor of the flat coi1s upon the plates is still more
favourable, but this measurement can only be made with
high frequency alternating current.
Apart from the great number of alternative arrangements
and connections between the different parts, - during
the period covered by this report eight different
circuit diagrams were tested in addition to the
experiments above - the following so far unsolved
problems are hindering success in making the
- (a) The influence of the pre-magnetization and of the
magnetizing effect due to the battery current, upon the
individual frequency of the oscillating circuits.
- (b) The influence of the Barckhausen effect on the
phase conditions of the oscillations in the individual
circuits and on the mutual magnetic and electrical processes.
- (c) The influence on the movement of electrons in the
pre-magnetized steel rods by the high frequency
pulse-like field variations, through the
oscillations of the molecules of the magnets.
After experience previously gained on the working
apparatus, and on the basis of the technical
measurements and examinations mentioned above,
the picture of the way in which the apparatus
works is as follows.
Due to the connecting of the batteries, a current
impulse is induced in the anchor circuit which
charges the plates. The discharge current from the
plates causes electrical interruption of short
duration of the battery current in the field circuit,
which furthermore inductively interrupts, or
changes the direction of, the battery current in
the directing circuit for a short time.
The electromagnetic field induced by this process in
the directing circuit by its dissipation, induces
over the field circuit a current in the anchor
circuit recharging the plates, and so forth.
Due to the influence of the Barckhausen effect
each single process has an impulse-like character,
and. the necessary change of phase is produced
to allow the regularity of the process.
Due to a source, up to the present not investigated,
and not explainable by existiting scientific theories,
an additional quantity of energy is freed during
each cycle which leads to a continual raising of
the amplitude of the mutual processes, until the
magnetic cores are saturated.
From the fact that, in the resistance of the apparatus
pulsed direct current is flowing (see Report by
Professors Kloss and Schumann) there is possibily an
up to now unknown rectifying effect, or alternatively
the gain in energy is produced only during one half
of the cycle, either during the charging or
discharging of the plates. The activity in the
apparatus must take place in the ten oscillation
circuits in a phase-like manner. As mentioned
above no technical means were available to make
the necessary tuning adjustments.
It is clear from the above that the success of the
inventor up to now could only be to chance, or
happy accident. The necessity, therefore, arises to
transfer the apparatus from the state of empirical
development, with sufficient technical means and
based on results of an exact basic research, to a
state of working procedure which can be controlled.
6. Further Procedure
In a simple apparatus, possibly only consinting
of one oscillation circuit, the problems
mentioned in paragraph 4 should be cleared up.
The exoitation of the oscillating circuit being
caused by an appropriate valve circuit.
After clearing these problems a second oscillation
circuit may be added, which will allow the
examination of the conditions necessary for the
mutual building up of effects.
It will then be possible for the first time to go from
external excitation to self interruption and a solely
electro-magnetic basis, whith the aim of bringing the
apparatus in question to work systematically.
Berlin, 27 September 1943
(Coler) (Dr. Frohlich)
Extract from Statement by Coler relating to
These fundamental researches, which have made the first
real and large breach in the citadel of present scientific
belief, will now be described in detail.
The installation shown in Figure 14 was used in the
A transformer, with a ratio of 1 : 1 was connected on
its primary side through a periodic make-and-break X
to a D.C. source U. Great care was taken, to ensure
that the make and break functioned smoothly, without
backlash and uniformly, at high frequencies and thus
produced as clear and unambigous a result as possible.
On the secondary side the coil S was conected with
resistance R, a reversible rectifier G, and a highly
sensitive hot-wire ameter, to form a circuit.
The resistance R was large ocmpared with the
apparent resistance of the coil S.
Switch Sch allowed the switching of the rectifier G
to be carried out in such a manner, that in one
case the half-wave of the opening impulse, and in
the other that of the closing impulse, was
In order to prevent any possible objection, that
the iron had any influence on the results, the
whole transformer was cut out during the
expriments and an iron-free flat coil arrangement
used as the inductor during these experiments.
This eliminated all interference and had
excellent transmission properties. The required.
sensitivity was attained in these measurements
by using a thermopile with the most sensitive
milliammeter. After many trials, the
motor-driven driven interrupter of a Bosch
ignition magnet was used as make-and-break.
This gave very uniform and smooth interruption
with a frequency of 100 c/s. The result obtained
with this experimental arrangement, which already
eliminated all the possible causes of later
objections, was the clear proof of a
considerably larger energy during opening (intake),
compared with closing impulses.
The energy was determined by i2 from the measured
current intensity, and as the resistance R is
large compared to the apparent resistance of
the coil, the objection, that the opening impulse
had a frequency spectrum of considerably higher
value than the closing impulse, could not hold good.
In order to counter all other plausible and possible
objections the processes were recorded by an
oscillographic method. Unfortunately the light
strength of the available cathode ray oscillograph
tubes (Braun's tubes - it was during war time) did
not suffice to produce perfect oscillogramms. Consequently,
for the time being at least, this aid, which would have
completely removed all objections, had to be dispensed
with and a Simens' loop oscillograph was therefore used.
By choosing suitable loops, sources of error were eliminated as
far as possible, or at least kept within very sma11 limits.
The most careful planimetric measurements again gave the same
results as those obtained with the experimental installation
described above, at least in principle, even though the
percentage difference of the quantity of energy in the
opening and closing impulses was slightly less in the measure-
ments of the oscillogram than those obtained from the thermophile.
It still amounted to an average of 10% compared with 50% in
the measurements, so that errors in the planimetric measurements
are not to be assumed.
Also, if this had been merely a scattering of the results,
a difference in favour of the closing impulse must have
occurred at least once.
However the difference was always in favour of the opening
impulse. Any possible errors in the planimetric measurements
controlled and avoided, by carefully cutting out the figures
produced and weighing them on a most sensitive and
Consequently this observation can also be considered
as a proof of the fact that an energy difference exists.
The circumstance that the percentage of this unequality
appears smaller in the oscillographic measurements than
in the thermal, which at a power frequency of 100 c/s
assuredly yield a sufficiently accurate mean value,
allowing also for the resistance ratios of the rectifier,
can readily be explained by the lag of the oscillograph
used, which is not even capable of recording the
considerable, but extremely short, energy peak of the
Although, therefore, the inertialess cathode ray tube
was not used in these measurements as a final proof, I can
consider my discovery of the energy difference between the
opening and closing impulse as proved on the basis of
As this also proves simultaneously, that my intuitively
derived view, based on my most primitive experiments,
of these processes has proved correct, the reader will
forgive me, if I consider my other two results as correct,
until new, and above all better explanations are found for
the phenomena described. This all the more, as my
development of the "Space energy receiver" was based on
this and was successful.