Year: 1886

page_text: Date of Application, 31st Mar., 1886.
Complete Left, 28th Dec., 1886.
Complete Accepted, 28th Jan., 1887.
We, CHARLES EDWARD JACOT, and EDOUARD BOvy, both of Chaux-le-fonds, in
Switzerland, do hereby declare the nature of this invention to be as follows:-
The improvements which constitute our invention are, as a whole, to be considered
as a new watch-mechanism, which will afford the advantages hereinafter enumerated :
1st. A cheap manufacture obtained by great simplicity in the construction of
the watch.
2nd. An exact working of the watch during ten days, without being re-wound.
3rd. A cheap setting-mechanism, of an easy working.
In the accompanying drawings,
Fig. 1, shews a plan view of the watch-mechanism as it would appear when the dial
is removed.
Fig. 2 is a plan view of the mechanism as it would appear when the watch case
is opened.
Fig. 3 is a transverse section through X, Y, of fig. 1.
Fig. 4 shews the means by which the end of the main spring is affixed to the core,
and Fig. 5 shews the wire securing the barrel to the plate.
In all the figures similar letters refer to similar parts or pieces.
The barrel C, of our watch mechanism, is of the same size as the pillar plate, and
forms a bottomless circle provided with a number of ratchet teeth. This circle is
placed in a groove of the plate A, and both of them are provided with a corresponding
circular groove in which is introduced, by means of a tangential hole, a circular
wire c, (Fig. 5) for keeping the circle Cin place, so as to permit the said circle turning
freely in the groove in plate A, without the possibility of its becoming displaced.
The barrel C, is covered with a glass d, lield by a bridge D, affixed on the same, in
any suitable manner. This bridge is provided with a hinged piece D' intended to be
lifted (Fig. 3), in view of winding up the spring, and to be laid down (Fig. 2) in
order to shut the case.
The spring click S prevents the return of the barrel, by engaging into its teeth.
The main spring R, is of a peculiar shape being wider at the outer end and
narrower at the inner end. This spring, so shaped, has the advantage of working with

page_text: more regularity, the conditions of friction between its windings being better than those
of mainsprings of equal width throughout.
The inner end of the main spring is affixed to the core E, in the manner shewn in
Fig. 4, and is intended to avoid the softening or tempering of the end of the spring
blade, which is now necessary in the usual manner of affixing the same.
The core E, is provided with a hole e, bored in it parallel to its geometrical axis, and
is connected with the circumference by means of an eccentric opening (Fig. 4). The
extremity of the spring R, is bent round like a hook and fills the said holo when the
blade is introduced into the opening.
The core E, is affixed on a squared part of the axis of the first wheel 1, placed in
the centre of the watch, between the plate A, and the bridge B..
The wheel 1, gears- into the pinion of wheel 2, which gears into the pinion of
wheel 3.
The wheels 4 and 5 transmit the motion to the escapement wheel 6, acting upon an
anchor 7 and balance wheel 8.
In the hollow pinion of wheel 3, there is affixed, by friction, the split pin of a
pinion 9, placed in a groove of the bridge B. This pinion is intended to move the
hands. It gears into a minute wheel 10, the pinion of which drives the hour
wheel 11, bearing the hour-hand H. The wheel. 10.drives the pinion 12, in which is
affixed a pin, bearing the minute hand G, and traversing the axis of the first wheel 1,
in its whole length. The pin, carries a wheel F, placed between the glass d, and the
bridge D. The wheel F, is intended to be turned by hand for the purpose of setting
the hands.
ERNEST DE PASS, Fel. Inst. P.A.,
68, Fleet Street, London,
Agent for tho Applicants.

page_text: Improvements in Watches.
We, CHARLES EDWARD JACOT; and EDOUARD Bovy, both of Chaux-de-fonds, in
Switzerland, 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 drawings left with our Provisional
Specification, and to the letters and figures marked thereon, that is to say :—
The improvements which constitute our Invention are, as a whole, to be considered
as a new watch-mechanism, which will afford the advantages hereinafter enumerated:
1st. A cheap manufacture, obtained by great simplicity in the construction of
the watch.
2nd. An exact winding of the watch for ten days without re-winding.
3rd. A cheap setting mechanism of easy working.
In the drawings left with our Provisional Specification, Fig. 1 shews a plan-view of
the watch-mechanism, as it would appear when the dial is removed. Fig. 2 is a plan-
view of the mechanism, as it would appear when the watch case is opened. Fig. 3 is
a transverse section on the line X, Y of fig. 1. Fig. 4 shews the means by which the
ond of the main-spring is affixed to the core, and Fig. 5 shews the wire securing the
barrel to the plate.
In all the figures similar letters refer to similar parts or pieces.
The barrel C, of our watch mechanism, is of the same size as the pillar plate and
forms a bottomless circle, provided with a number of ratchet-teeth. This circle is
placed in a groove of the plate A, and both of them are provided with a corresponding
circular groove in which is introduced, by means of a tangential hole, a circular
wire c, (Fig. 5) for keeping the circle C, in place, so as to permit the said circle to
turn freely in the groove in plate A, without the possibility of its becoming displaced.
The barrel C, is covered with a glass d, held by a bridge D, affixed on the same, in
any suitable manner. This bridge is provided with a hinged piece D' intended to be
lifted (Fig. 3) in view of winding up the spring, and to be laid down (Fig. 2) in order
to shut the case.
The spring click S, prevents the return of the barrel by engaging into its teeth.
The main spring R, is of a peculiar shape, being wider at the outer end and
narrower at the inner end. This spring, so shaped, has the advantage of working with
more regularity, the conditions of friction between its windings being better than those
of main springs of equal width throughout.
The inner end of the main-spring is affixed to the core E in the manner shewn in
Fig. 4, and is intended to avoid the softening or tempering of the end of the spring
blade, which is now necessary in the usual manner of affixing the same.
The core E, is provided with a hole e, bored in it parallel to its geometrical axis, and
is connected with the circumference by means of an eccentric opening (Fig. 4). The
extremity of the spring R is bent round like a hook and fills the said hole when the
blade is introduced into the opening.

page_text: The core E, is affixed on a squared part of the axis of the first wheel 1, placed in
the centre of the watch, between the plate A and the bridge B. The wheel 1 gears
into the pinion of wheel 2, which gears into the pinion of wheel 3.
The wheels 4 and 5 transmit the motion to the escapement wheel 6, acting upon an
anchor 7, and balance wheel 8.
In the hollow pinion of wheel 3, there is affixed by friction, the split pin of a
pinion 9, placed in a groove of the bridge B. This pinion is intended to move the
hands. It gears into a minute wheel 10, the pinion of which drives the hour-wheel 11,
bearing the hour-hand H. The wheel 10, drives the pinion 12, in which is affixed a
pin, bearing the minute hand G, and traversing the axis of the first wheel 1, for its
whole length. The pin f, carries a wheel F, placed between the glass d, and the
bridge D. The wheel F is intended to be turned by hand for the purpose of setting
the hands.
Having now described the nature of our invention, and in what manner the same is
to be performed, we declare that we claim :-
1st. The main spring R, the width of which decreases from the outer to the inner
end of the blade, substantially as described.
2nd. The barrel C provided with click-teeth and maintained in a groove of plate A
by means of a circular wire c, in combination with the glass d, and the bridge D),
provided with a hinged piece D', substantially as shewn and described.
3rd. The core E, with hole e, in combination with the bent hooked end of the main
spring, as shewn and described and for the purpose specified.
4th. The pin, traversing the watch through and through, and carrying on one end
the pinion 12, and the minute hand, and on its other end a wheel F, intended to set
the hands by turning said wheel with the finger.
5th. The combination of the plate A, bridge B, barrel C, spring R, core E, and
movers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, with any escapement and with a setting
mechanism F, as shewn and described.
ERNEST DE FADD, Fel. Inst. F.A.,
68, Fleet Street, London,
Agent for the Applicants.