Year: 1886

page_text: Date of Application, 10th June, 1886.
Complete Left, 10th Mar., 1887.
Complete Accepted, 10th May, 1887.
I PETER JENSEN Fel. Inst. P.A. of 77 Chancery Lane in the County of Middlesex
do hereby declare the nature of this invention to be as follows:-
The object of this invention is to produce intermittent electric light in such manner
that a clockwork apparatus kept wound up is set going by pressing on a knob of a
contact battery and kept going for a certain time, during which the current from a
second or lighting battery is closed and gives the desired light. The whole apparatus
may be enclosed in a small box.
The apparatus consists of a clockwork in combination with a contact, whereby the
wound up clockwork is released by electro magnets that is to say set going while at
the same time contact is made whereby the electric current for the lamps is closed
until the clockwork interrupts it automatically.
By pressing on the knob of the contact battery its circuit is closed whereby the
armature of a pair of electromagnets is attracted. To the armature is fixed a lever
on whose fulcrum it pivots. When the armature is attracted the end of the lever is
pushed against the underside of an insulated contact spring, whereby the lighting
battery is closed. At the same time a spring hook or pawl which is also fixed to the
pawl wheel and drops into a tooth space.
armature, passes over one or more teeth of a
But to the aforesaid lever or lever fulcrum is also fixed a stop arm which is now also
withdrawn from the fly of the clockwork so that the latter is set going. The aforesaid

page_text: pawl wheel will thus turn and drag the spring pawl with it thus withdrawing the
armature from the electro magnet, whereby on the one hand the lever will be with-
drawn from the contact spring and the circuit of the lighting battery consequently
again be broken, and on the other hand the stop will be raised so far as to come
against the vanes of the fly and stop the clockwork.
The time of giving out light can be regulated by adjusting screws for limiting the
forward and back motion of the lever.
Instead of winding up the clock for a certain long time, the arrangement may be
so modified that the clockwork is only wound up sufficiently for each time of use
according to the time the lamps are to burn.
Dated this 10th day of June 1886.
JENSEN & SON,
77, Chancery Lane, London, W.C.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Apparatus for Producing Intermittent Electric Light.
I, PETER JENSEN Fel. Inst. P.A. of 77 Chancery Lane in the County of Middlesex
do hereby declare the nature of this invention (a communication to me from abroad
by Karl Pollak and G. Wehr both of Berlin Germany) and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :—
The object of this invention is to produce intermittent electric light in such manner
that a clockwork apparatus kept wound up is set going by pressing on a knob of a
contact battery and kept going for a certain time, during which the current from a
second or lighting battery is closed and gives the desired light. The whole apparatus
may be enclosed in a small box.
In Figures 1 and 2, which are elevation and plan with the side and upper part of
the box C removed respectively, the contacts are shewn withdrawn.
The apparatus consists of a clockwork in combination with contact whereby the
wound up clockwork is released by electromagnets that is to say set going while at
the same time contact is made whereby the electric current for the lamps is closed
until the clockwork interrupts it automatically.
By pressing on the knob of the contact battery A its circuit is closed whereby the
armature a of a pair of electromagnets bb is attracted. To the armature is fixed a
lever c on whose fulcrum it pivots. When the armature is attracted the end of the
lever c is pushed against the underside of an insulated contact spring d, whereby the
lighting battery Bis closed. At the same time a spring hook or pawl e, which is
also fixed to the armature, passes over one or more teeth of a pawl wheel and drops
into a tooth space.
But to the fulcrum shaft of the aforesaid lever c is also fixed a
stop arm which is now also withdrawn from the fly h of the clockwork D) so that
the latter is set going. The aforesaid pawl wheel will thus turn and drag the spring
pawl e with it, thus withdrawing the armature a from the electromagnet, whereby on
the one hand the lever c will be withdrawn from the contact spring d and the circuit
of the lighting battery B consequently again be broken, and on the other hand the
stop g will be raised so far as to come against the vanes of the fly and stop the
clockwork.
The time of giving out light can be regulated by adjusting screws tt for limiting
the forward and back motion of the lever c.
The current circuit of the contact battery A passes from the battery through the
binding screws kk to the coils of the electromagnets bb and through the binding
screws in m³ back to the battery whereby the armature a, the axis of which is
connected to the bobbin by the wire r, is as described attracted by the magnets, the
clock work D set in motion and the current of the lighting battery B closed. The
said current comes from the wire n to the binding screw o and goes through the

page_text: clockwork D and the lever c to the contact spring d and through the wire n¹ to
the lamps and then back to the battery.
Instead of winding up the clock for a certain long time, the arrangement may be
so modified that the clockwork is only wound up sufficiently for each time of use
according to the time the lamps are to burn.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim as the
invention communicated to me is :-
:-
First An apparatus for intermittent electric lighting consisting of the com-
bination of a clockwork apparatus with a contact by which the clockwork when
wound up is released by the electromagnets that is to say set in motion a contact being
effected at the same time, whereby the electric current is closed for the lamps until
the clockwork automatically interrupts same substantially as described.
Second An apparatus for intermittent electric lighting, consisting of the com-
bination of a clockwork apparatus with a contact by which the clockwork is wound
up every time and set in motion by an electric current or by mechanical means
whereby the electric current for the lamps is closed until the clockwork interrupts
same automatically substantially as described.
:
Third The construction of apparatus for intermittent electric lighting sub-
stantially as described and shewn.