Year: 1886

page_text: Date of Application, 25th Oct., 1886
Complete Left, 13th July, 1887
Complete Accepted, 16th Aug., 1887.
1, AMI LECOULTRE PIGUET, of Brassus, in Switzerland, Watch Manufacturer, do
hereby declare the nature of this invention to be as follows:-
My Invention consists of a new mechanism intended to move the hand marking
the quarter seconds in chronograph watches.
In the accompanying drawings the said mechanism is shown without the other
parts of the watch mechanism. Only the gear wheels of the movement are indicated
by dotted lines..
Fig. 1, is a plan view of the mechanism, Fig. 2 is a section, through 1, 2, 3, 4
and 5, on an enlarged scale, Fig. 3 shews a view of the underneath face of wheel c.
In all the figures similar letters refer to similar pieces.
The main-spring wheel A, drives the pinion of a centre-wheel B, which drives the
wheel C. This latter one drives the pinion of the seconds-wheel D, gearing into
the pinion of the escapement wheel E. F, is the axis of the anchor, and G, is
the balance-wheel.
On the axis of wheel C is placed a wheel c, turning with smooth friction upon it
and maintained by means of a cores, affixed to said axis. A spiral spring r, affixed
to core s, presses its spirals against the inner edge of a bevelled ring c¹, forming
part of wheel c. The friction of spring r, against ring c¹ causes the wheel
with wheel C, as long as no obstacle is opposed to it.
C,
to turn
The tooth range of c drives the pinion of H, which drives the wheel I. The latter
engages in the pinion of a wing-wheel J, provided with four wings. The latter is
affixed to a lever L. which is intended to bring the wheel J either in the position
shewn in the drawing, in which its wings are in reach of the teeth of K, or in a
position in which J may turn without striking the teeth of K.
The axis of J carries the hand J¹ marking the quarter seconds.
Wheel K, is provided with 30 teeth and is affixed to the axis of the escapement
wheel E.
At every quarter second, marked by one oscillation of the balance-wheel, the
wheel K turns for one of its teeth and thereby allows the wing-wheel J to turn for
one of its wings, the hand J making at one jump a quarter of a revolution.

page_text: Now there must be a mechanism intended to stop the quarter seconds hand and to
set the same at 0, and at the same time as it is done for the chronograph hand. This
is effected by means of the levers L, O and P, and the star wheel M.
During the working of the chronograph works the lever L is placed as in the
drawing. Its hook being engaged into a notch of the star wheel M, and its other
arm holding the wing-wheel Jin reach of wheel K.
The stop lever P, bears by its hook upon a full part of M and also the setting
lever O, both being held out of reach of the wings of J.
The star wheel which drives the levers of the chronograph mechanism, which is
not shewn in the drawing, is affixed to the same axis as M, and is turned with the
latter in the usual way, by means of a click-wheel N.
When N, is turned from one tooth, from the position shewn in the drawing, the
lever L is lifted by a full part of M so as to put the wings of J out of reach of the
teeth of K. At the same moment the hook of lever P falls into a notch of M and its
other end stops the wing-wheel J, stopping thereby the quarter seconds hand J', upon
one of the four divisions of its dial. The wheel J being stopped the whole train I, H
and c is stopped and the spiral spring r turns with smooth friction within the ring c¹,
without turning wheel c.
If the wheel N is turned again from one tooth, the star M is displaced so as to lift
the lever P, again, and to put the same out of reach of the wings of J, and at the
same time the hook of lever O falls into a notch of M, and its other end strikes upon
the nose with which one of the wings of J has been provided. Thereby the hand J'
is set back to 0.
From that position the mechanism falls back into the first position, shewn in the
drawings, when the click wheel N is again acted upon.
DL: FIL
1000
ERNEST DE PASS, Fel. Inst. P.A.,
68, Fleet Street, London,
Agent for the Applicant.

page_text: I, AMI LECOULTRE PIGUET, of Brassus, in Switzerland, Watch-manufacturer, do
hereby declare the nature of said 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 my Provisional Specification,
that is to say :-
My invention consists of a new mechanism intended to move the hand marking the
quarter seconds in chronograph watches.
In the drawings left with my Provisional Specification, the said mechanism is
shewn, without the other parts of the watch mechanism. The gear wheels only of
the movement are indicated by dotted lines.
Fig. 1 is a plan view of the mechanism, Fig. 2 is a section, on an enlarged scale,
through 1. 2, 3. 4 and 5. Fig. 3 shews a view of the ander face of wheel c.
In all the figures similar letters refer to similar pieces.
The mainspring wheel A, drives the pinion of a centre wheel B, which drives the
wheel C. This latter wheel drives the pinion of the seconds wheel D, gearing into
the pinion of the escapement wheel E. F is the axis of the anchor, and G is the
balance wheel.
On the axis of the wheel C, is placed a wheel c, turning with slight friction upon
it, and maintained by means of a core s fixed to said axis.
A spiral spring r, affixed
to the core s, presses its spirals against the inner edge of a bevilled ring e', forming
part of wheel c. The friction of spring r against ring e¹, causes the wheel c to turn
with wheel C so long as no obstacle is opposed to it.
The teeth of c drive the pinion of H which drives the wheel I. The latter
engages with the pinion of a winged wheel J provided with four wings. The latter
is affixed to a lever L which is intended to bring the wheel J either into the position
shewn in the drawing, in which its wings are in reach of the teeth of K, or into a
position in which J may turn without striking the teeth of K.
The axis of J carries the hand J' marking the quarter seconds.
The wheel K is provided with thirty teeth, andļis affixed to the axis of the escape-
ment wheel E.
to
At every quarter second marked by one oscillation of the balance wheel, the wheel K
turns for the distance of one of its teeth and thereby allows the winged wheel J,
turn for one of its wings, the hand J making, at one jump, a quarter of a revolution.
Now there must be a mechanism to stop the quarter seconds hand and to set the
same at 0, at the same time as it is done for the chronograph hand. This is effected
by means of the levers L, O, and P, and the star wheel M.
During the working of the chronograph mechanism the lever L is placed as in the
drawing; its hook being engaged in a notch of the star wheel M, and its other arm
holding the winged wheel Jin reach of the wheel K.

page_text: The stop lever P bears, by its hook, upon a full part of the wheel M, and also the
setting lever O, both being held out of reach of the wings of J.
The star wheel which drives the levers of the chronograph mechanism, which is not
shewn in the drawings, is affixed to the same axis as wheel M, and is caused to turn
with the latter in the usual way by means of a click wheel N.
When this click wheel is turned for one tooth, from the position shewn in the
drawing, the lever L is lifted by a full part of M, so as to put the wings of J out of
reach of the teeth of K. At the same moment the hook of lever P falls into a notch
of M, and its other end stops the winged wheel J, thereby stopping the quarter
seconds hand J¹, upon one of the four divisions of its dial. The wheel J being
stopped, the whole train I. H, and c, is stopped, and the spiral spring turns with
slight friction within the ring e', without turning the wheel c.
If the wheel N be turned again for one tooth, the star M is displaced so as to
lift the lever P again, and to put the same out of reach of the wings of J, and, at the
time, the hook of lever O, falls into a notch of M, and its other end strikes upon the
nosej, with which one of the wings of J has been provided. The hand J2 is thereby
set back to 0.
From this position the mechanism falls back into the first position shewn in the
drawings, when the click wheel N is again acted upon.
Having now described my Invention, and in what manner the same may be
performed, I claim :
In chronograph watches with quarter seconds hand, the combination of the
wheel C with core s, and spiral spring r, and of a wheel e having a ring c¹, with the
movers H and I, and with a winged wheel J, provided with a nose j, carried by a
lever L, and a click wheel K, affixed to the axis of the escapement wheel, lever O
and lever P, all substantially as herein described and as shewn in the drawings, and
for the purpose specified.