Improvements in or relating to Electro-mechanical Impulse-devices applicable to Clocks and for other Purposes.
Year: 1899

page_text: Date of Application, 17th May, 1899
Complete Specification Left, 16th Feb., 1900-Accepted, 7th Apr., 1900
Improvements in or relating to Electro-mechanical Impulse-devices
applicable to Clocks and for other Purposes.
I, HENRI CAMPICHE, Watchmaker, R. Kuster & Co.. Cairo, Egypt, do hereby
declare the nature of this invention to be as follows:-
The invention relates to an electro-mechanical device which may be used in
any apparatus in which a mechanical impulse is to be imparted, (for instance to
a pendulum) by means of closing the circuit in which both a source of electricity
of any kind and the said apparatus are included.
The invention will be described by way of example as constructed for acting
upon the pendulum of a clock.
A base or support carries an electromagnet and a plate to which is pivoted
on a pin two levers. The inner lever is provided with a spring which tends to
move the same away from the electromagnet the armature of which is fixed to
the said inner lever.
A strong spring, secured to the outer lever bears against the heel of the inner
lever, and therefore the two levers remain normally applied against one another,
the pressure of the two springs causing the whole device to remain normally
out of contact with the electromagnet.
The free end of the outer lever carries a rocking lever pivoted to it and having
a flexible arm secured to its free end and projecting downwards.
The rocking-lever is normally caused to bear either owing to its own weight or
to a suitable spring against a pin fixed to a cross bar on the electromagnet.
If an electric current is sent through the electro-magnet the armature of the
same will be attracted and the end of the inner lever will be drawn to it, turning
on its pivot. If at that moment the flexible arm is free to move in the same
direction, the outer lever to which it is connected will simply move with the
inner lever. But if at that moment the flexible arm is in contact with the
object to which an impulse is to be imparted, say for instance with a clock-
pendulum, the outer lever will be held by the resistance of the pendulum in its
outward position and the result will be that the heel of the inner lever will act
upon the spring of the outer lever, the tension of which will react upon the
pendulum through the rocking lever and its flexible arm.
The upper end of the rocking lever bearing against the fixed pin will not be
able to move so that its pivot and lower end will alone be moved in the direction
of the magnet by the outer lever and the depending arm pressing the pendulum
in the same direction will be turned on its pivot.
At this moment of the working of the apparatus the electric circuit will be
interrupted so as to allow the parts to return to their normal positions.
Dated this 17th day of Var 1899.
BOULT & WADE,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Electro-mechanical Impulse Devices
applicable to Clocks and for other Purposes.
I, HENRI CAMPICHE, of R. Kusten & Company, Cairo, Egypt, do hereby declare
the nature of this invention and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
This invention relates to electro-mechanical impulse devices particularly
adapted to driving or operating upon clocks or other apparatus requiring impulses
imparted at intervals, and has for its particular object the arrangement of the
mechanism in such a manner that the impulse shall be transmitted gradually
to the object it is desired to move and the force of each impulse shall be constant.
In carrying out this invention according to one method an electro-magnet 18
provided with an armature carried by a spring-controlled lever pivotted to any
convenient support. This lever is provided with a tail or projection which
extends beyond the point at which it is pivotted and about which it turns.
second lever carried by the same pivot or arranged in close proximity to the
first lever has secured to it a spring, which bears against the tail of the first lever
so that the two levers are normally kept in contact with each other. Pivotted
to the free end of the second lever is a rocking lever, one end of which bears
against a stationary stop or pin, whilst the other is in engagement with the object
to which it is desired to transmit the impulses given by the electro-magnet.
A
When a current is passed through the electro-magnet the armature is drawn
towards the latter against the action of its spring. This will cause the tail of
the armature lever to force back the spring secured to the second lever so that
the second lever will follow the movement of the armature. At the same
time the movement of this second lever relatively to the stationary stop aforesaid
will cause the stop to turn the rocking lever about its pivot so that the free end
of the rocking lever will receive a greater angular movement than that of the
second lever by which it is carried.
In the accompanying drawings which illustrate one method of carrying out
this invention,
Figure 1 is an elevation of the apparatus in part section showing the different
parts of the mechanism in one position:
Figures 2 and 3 are similar views of the apparatus showing the positions taken
by the different parts of the mechanism during operation, and
Figure 4 is an underside view showing the mechanism in section on the
line 44 of Figure 1.
Like letters indicate like parts throughout the drawings.
Secured to a base A is an electro-magnet B and a bracket C provided with a
pin or pivot D. On this pin or pivot D are mounted levers E and F and secured
to the free end of the lever E is the armature G of the electro-magnet. The
lever E is provided with a tail or projection E which extends beyond the pivot D
and secured to the lever F is a spring H which bears against the tail E of the
lever E. A rocking lever I is pivotted at to the free end of the lever F and to
the lower end of the lever I is secured a pendant arm J. The parts F I constitute
a compound lever. The upwardly extending or free end of the rocking lever I
is arranged to hear against a stationary stop or pin K conveniently carried by a
bridge-piece secured to the electro-magnet B. The lever E is normally kept
in such a position that its armature G is withdrawn from the electro-magnet B
by means of a spring e secured to the lever and conveniently made to bear against
the bracket C, and the spring H bearing against the tail E of the lever E will
normally keep the levers E and F together. For the spring e a weight or other

page_text: returning-device for the armature might be substituted. An adjustable stop Li
of any convenient construction may be mounted upon the base A in order that the
distance to which the armature G is permitted to move from the electro-magnet B
may be adjusted.
The operation of this device is as follows:-
When no current is passing through the electro-magnet B the levers E F and
the rocking lever I take up the position shown in Figure 1. If now the current
is passed through the electro-maguet, the armature G will be drawn towards
the pole pieces of the electro-magnet so that the lever E will swing upon its
pivot D and take the position shown in Figure 2 deflecting the spring H; the
lever F would, if no resistance were offered to it, immediately follow the move-
ment of the lever E under the action of that spring so that both levers would take
the position shown in Figure 3. The arm J is assumed to engage with some
device it is desired to move, such for instance as the pendulum of a clock, which
it will operate gradually by the action of the spring on the lever F and arm J.
As the lever F swings towards the lever E the rocking lever I will turn about its
pivot so that only the lower portion of this lever advances, the upper portion
remaining against the pin K, as is shown in Figure 3 whence it will be observed
that the angle through which the arm J is moved is greater than that through
which it would have moved had it been rigidly secured to the lever F.
When the different parts of the mechanism have taken the position shown in
Figure 3, the forward stroke of the apparatus is completed; whenever thereafter
the current is cut off, the spring e returns the levers E and F to their normal
position in which they are shown in Figure 1, the rocking lever being returned
by the pendulum to which it may be attached or if necessary by any convenient
spring or gravity device.
The spring H in addition to imparting movement gradually to any objects
secured to the arm J and thus preventing sudden shock when the current is passed
through the electro-magnet B will also ensure the force of each impulse being
constant, as provided the current passing through the electro-magnet B is of
sufficient strength to draw the armature G against the pole pieces, the force
applied to the lever F will always be that exerted by the spring H when extended
a given distance, so that however violently the armature G may be brought against
the pole pieces of the electro-magnet B, the force with which the lever F moves
will be constant.
It will be understood that this mechanism may be used for driving apparatus
other than clocks, the arm J being adapted for connection to any object it may
be desired to move by imparting impulses at stated intervals.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is;-
-
1. In an electro-mechanical impulse device the combination with a movable
armature of a simple or compound lever such as For FI and a spring forming an
operative connection between the armature and that lever substantially as and for
the purpose described with or without a stop such as K for the part I.
2. In an electro-mechanical impulse device the combination with a pivotted
armature lever having a tail E¹, and a lever such as F, of a spring, bearing on
the tail and on the lever F, substantially as described.
3. The complete electro-mechanical impulse device substantially as described
and illustrated in the accompanying drawings.
Dated this 16th day of February 1900.
BOULT, WADE & KILBURN,
Agents for the Applicant