Year: 1888

page_text: Date of Application, 13th Oct., 1888
Specification Accepted, 30th Nov., 1888
I, PAUL PERRET of Chaux de Fonds, in Switzerland, Watch Manufacturer 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, reference being had to the accompanying drawings and to the letters and
figures marked thereon, that is to say :-
My invention consists in a watch movement of a simple construction, each part of
which is easily withdrawn and replaced. My mechanism has the usual train of wheels,
but the arrangement of the bridges, of the stem-winding mechanism, and of the dial,
is made so as to reduce the number of the screws and to facilitate the unmounting of
the movement.
2 a
In the accompanying drawings, Fig. 1 is a top view of the movement, and Fig.
view of the mechanism placed under the dial. Fig. 3 shows separately the winding
mechanism, and Fig. 4 shews a different arrangement of the same construction. Fig. 5
shews the manner in which the dial is secured upon the movement.
In all the figures similar letters refer to similar pieces.
The half-plate P is affixed to a plate A by means of the pillars 1, 2, and 3, and it
carries the spring-barrel, the first and the second-wheel, and further the winding
mechanism which is secured upon the half-plate P by means of a bridge G. The screws
1 and 3 secure at the same time the bridge G to the half-plate P, and the latter to
plate A. The screw 2 secures only the half-plate P to A, and screw 4 secures only
bridge G to half-plate P. This arrangement allows of the withdrawal of either only
the bridge G without unscrewing the screw 2 in view of having the winding
mechanism uncovered, or of the half-plate P without unscrewing the screw 4 so as to.
withdraw the movers without uncovering the winding mechanism.
The crown-wheel E, the wheel F, which is fixed upon the main-spring axis, and the
click m with its spring r, are recessed in the half-plate P and held in place by the
bridge G.
The click m does not act as usual upon the wheel F but upon the wheel E; the
pivot of the latter is a cylindrical projection i with which the corresponding recess is
provided and which is surrounded by a steel ring h having a pin i¹ preventing its

page_text: rotation. The spring is held in place by the pin 7. The pivot of the click m is
also formed of a cylindrical projection with which the corresponding recess of the
half-plate P is provided, and into which the screw 4 is screwed.
Under the dial there is a hand setting mechanism (Fig. 2) consisting of a sliding
pinion b, an oscillating lever g with spring k, a double armed lever c, and a sliding
bolt d, which is drawn out of the watch case when the hands are to be set. The bolt a
then causes the lever c to lower the lever g and pinion b, throwing the latter into gear
with the wheel L.
The lever g, spring k, and wheel 1, are all held together in place by means of a
bridge o.
Fig. 4 shews a different arrangement of the bridges in which the aforesaid winding
mechanism is placed underneath the half-plate P. Fig. 5 shews on an exaggerated
scale the manner in which I secure the dial to the watchwork or movement.
The pins which are used up to the present for that purpose have many disadvantages,
and the thickness of the dials being very irregular it is necessary to arrange the dial
so as to prevent the irregular height of the whole movement resulting from that
fact. I therefore fix the dial J to a bezel B, and I adjust the latter into a recess
made for that purpose in the circumference of plate A. A pin a prevents the
rotation of the bezel B in said recess. According to the thickness of the dial I make
the bezel B higher or lower, so as to always have the same total height of the
watch.
Having thus described my invention I claim :
1st The combination. of the half-plate P, having three pillars 1, 2, and 3, with the
bridge G, wheel F, crown-wheel E, turning around a steel ring with pin i¹, click m
working upon E, and spring r, substantially as and for the purpose specified.
2nd. The combination of the bridge o, with lever g, spring k, and wheel Z, substan-
tially as and for the purpose specified.
3rd. The combination of the dial J with a bezel B, having a pin a, and with a
recess in plate A, for the purpose of preserving the same height for the whole
watchwork or movement, even when the thickness of the dials is irregular.
יתוש
101 1
1000
ERNEST DE
PASS, Fel. Inst. P.A.,
68, Fleet Street, London,
Agent for the Applicant.
ERNEST DE PASS, Fel. Inst. P.A.,
68, Fleet Street, London,
Agent for the Applicant.