Improvements in Electric Winding and Striking Clocks.
Year: 1889

page_text: Date of Application, 2nd May, 1889-Accepted, 29th Mar., 1890
COMPLETE SPECIFICATION.
Improvements in Electric Winding and Striking Clocks.
I JOSEPH JACOMIN, Clockmaker, of the city of Lyon, in the Republic of France, do
hereby declare the nature of the said invention for "IMPROVEMENTS in ELECTRIC
WINDING, AND STRIKING CLOCKS" and in what manner the same is to be performed,
to be particularly described and ascertained in, and by, the following statement:-
The subject of this invention is a clock wound, and striking, by electricity, or an
electric motor, such as Gramme's or Pacinotti's, in conjunction with a Siemens
coil, mounted between two magnets, or electro magnets, with straight, or jointed
armatures.
The transmission of motion from the electric motor, to the barrel spring, being.
effected either through the intermediary of an endless screw, or gear work.
The same letters of reference indicate like parts in the several figures.
Fig. 1. is a front elevation of a clock, furnished with my electric motor appliances.
Fig. 2. is a side elevation of the same, only those parts of the clock mechanism being
shown, with which the electric motor is put in cominunication.
Fig. 3 is a rear view of part of my appliances, and showing the electrical contact,
and snail or hammer lift.
Qis a frame fixed to the rear plate A¹, the lower end of this frame supports a
polarized magnet m, with soft iron armatures F, and insulators I, on which the
terminals P bearing the brushes P¹, are mounted.
M, is an electric motor of the Gramme, or Pacinotti type, mounted on the shaft M¹,
pivotting at O.
shaft
e,
The shaft M³, is hollow and within it the shaft o' turns and is supplied with a ball
governor, and spiral spring for regulating the speed of the striking. Above this and
supported by the plates K, K₁, is
this communicates with the shaft K³, on
which is mounted an endless screw v, gearing with the wheel g mounted on the axis b,
on which also is the pinion ¹, gearing with the teeth on the barrel spring box (not
shown in the drawings) which communicates motion to the clockwork.
The motor M, is actuated by electric batteries with which it is connected by any
known method transmitting its movement by its axis M' to the endless screw,
which in its turn sets the wheel g, in motion from the axis b, of which all the principal
functions emanate, and are as follow
Outside the plate A¹ the axis b, bears a snail C, which serves to lift the hammer 111
for striking the bell.
As long as the hook r (Fig. 1) engages with the teeth of the rack, the hammer 111
is free, and strikes the hours on the hell, but as soon as the rack is free from the hook,
the latter passes beneath the rack and holds the, hammer aloft and it does not again fall
till the half hour.
same
The hook X, holds the hammer in the air by aid of the hook 11 (fixed on the san
axis or shaft) which lifts the small arm (z on the shaft 2¹) held aloft as above described
Fig. 3.
The fall of the hammer 21 for striking the half hour is produced by the liberation
of the hook from the rack which in falling puts itself in position for striking the next
hour.
On the minute wheel side, the same shaft b, bears a pinion b¹, gearing with the
wheel g' which makes a complete turn each time the clock strikes and rewinds.
This axis also bears a hook k which serves to lift the rack one tooth for each stroke
of the hammer, and a pinion h' gearing with the teeth of the barrel spring box for
rewinding the spring actuating the centre wheel and escapement each hour.
At the exact hour the detent y raised by the second pin 1, of the small wheel i
(Fig. 2) falls again transmitting the contact by aid of the axis L traversing the plate
and meeting the contact h, by the arm S" bearing the pin U.

page_text: The current remains in closed circuit until the wheel g' has made a complete turn,
and a pin 1, on this wheel lifts the stop hook f, which opens the current in lifting the
piece y, and at the same time lifts the inner stop o¹, fixed on the shaft L Fig. 2. which
abuts against the pin o¹¹ on the wheel g of the endless screw v.
The stop hook is raised every hour to present itself before the pin oll to stop the
striking and rewinding.
The action of the current and working of the clock is as follows:-
The current enters at one of the brush holders P, continues its course through the
collector and motor M, and the other brush reaches the terminal R and thence to the
pin U.
At each hour the detent y falls and the pin U enters the fork h and contact then
takes place. The current being established the Gramme or other motor M, is set in
motion and turns the endless screw v, which actuates the wheel g. This wheel bears
on its axis the snail e, which serves to lift the hammer for striking the bell.
The same wheel 9 bears a pinion gearing with the wheel ¹ connected to the barrel
spring box one of the ends of the spring is fixed to the axis of the centre wheel. The
wheel h' being set in motion winds up the spring which actuates the centre wheel and
the escapement.
After its last blow the hammer remains aloft and at the half hour the hook & is
raised by a pin r¹ and unhooks the hammer which falls in striking the half hour.
The hook continues to rise until the rack falls on the snail S and puts itself in
position for striking the next hour.
The detent y is raised by the pin of the wheel g¹ and transmits the contact by
falling at the exact hour by aid of the axis L traversing the plate and rejoins the
contact h.
The detent y in falling simultaneously establishes contact, and liberates the wheel g,
which was held by the pin o¹.
In pushing the piece f, the pin 11 lifts the detent and at the same times frees the
pin U, of the contact h, the current is then broken.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed what I claim is
The method herein described of electrically winding, and striking clocks, with
simple or complicated striking mechanism, or of merely winding clocks, by aid of a
Gramme or Pacinotti electric motor, in conjunction with a Siemens coil, mounted
between two magnets, or electro magnets with straight or jointed armatures.
The transmission of motion from the electric motor to the barrel spring being
effected either through the intermediary of an endless screw, or gear work in the
manner herein set forth.
SM 1000
A. C. HENDERSON & Co.,
Patent Agents,
46, Southampton Buildings, Holborn, Agents for the Applicant.