Year: 1888

page_text: 1, EUGENE FRANÇOIS LOUIS GRANDJEAN, of Bienne, in Switzerland, Watch
manufacturer, do hereby declare the nature of said Invention, to be as follows:-
:-
This invention consists of a watch mechanism in which the escapement-
regulator, the seconds hand, and the band-setting mechanism are essentially
improved.
In the accompanying drawings, Fig. 1 is a top view of my improved watchi
mechanism in which is shewn the arrangement of my improved escapement-regulator
and the movers intended to act upon the seconds hand, said hand having its axis
placed in the centre of the watch. Fig. 2 shows the hand-setting mechanism, as
seen when the dial is removed. Fig. 3 is a plan and Fig. 4 a cross section of the
improved regulator, and of the balance bridge, on an exaggerated scale.
In all the figures similar letters refer to similar pieces.
The balance bridge, or cock A, is provided with an annular projection b, the inner
edge of which is bevelled, as shewn in fig. 4, and is provided with three entrances or
cuts out, the purpose of which is to give passage to the arms of the regulator B, the
central part of which enters into the ring b. The regulator B is characterized by its
openings or cuts-out c, c which transform its central part into an elastic ring d,
provided with an external bevil, to which is connected the concentric ring f, by means
of the full part e.
The said ring, which is a part of the regulator replaces the
so-called "coqueret," that is to say the metallic disc which is usually screwed upon the
balance bridge to affix thereon the stone C, upon which the upper end of the balance
wheel axis bears.
The outer bevel of d is made so as to correspond to the inner bevel of b, and the
elastic ring d is provided with two projections d¹ and d" which may be seized with a
pair of pliers so as to compress the elastic ring d when the same is to be placed into
the bevelled ring b, or removed therefrom. As the central part bears upon the
stone C the latter is fixed in its place by affixing the regulator, and is released
when the regulator is removed. This is of great importance, as the stone C

page_text: must often be taken out and examined by the watch maker, either when the
watch is to be regulated, or when the escapement is to be repaired, the stone C
replaced, etc.
In order to provide the watch with a seconds hand placed in the centre, I
arrange the seconds wheel E, as shewn in Fig. 1, so as to have it passing over
the half-plate X and gearing into a pinion F which is affixed to an axis placed
in the hollow axis of the centre wheel G, and bearing at its other end the seconds
band S.
The mainspring is wound up by turning the stem D, the rotation of which is
transmitted to the wheel L which is affixed to the mainspring axis, by means of the
pinion. H, the wheel I having a fixed pivot i, and the oscillating wheel J having its
pivot fixed to the arm 2 of the oscillating bridge K. The latter oscillates around
the pivot screw i, of wheel I, and is acted upon by a spring N which causes the
wheel J to gear into the teeth of the wheel L. as long as the oscillating bridge is
not acted upon.
The arm of K has a projection p engaging into a circular groove of the
stein D, and when traction is effected upon the latter the oscillating arm ³ of the
bridge K is displaced so as to put the wheel J into gear with the minute wheel P
(as. shewn by dotted lines in fig. 2). As long as the stem D is held in this position
the wheels may be set by turning the stem, and as soon as the stem is released the
wheels fall back into their first position, so that it cannot happen, as occurs in similar
hand-setting mechanism, that one having forgotten to replace the stem at rest, one
displaces the hands unintentionally.
The bridge K is further provided with an arm upon which there may be
a pusher pressing as shewn by the arrow and putting into action the hand-
setting mechanism, in place of doing so by traction effected upon the stem D.
Dated this 2nd day of Annil jeee

page_text: COMPLETE SPECIFICATION.
,
Improvements in Watches.
I, EUGÈNE FRANÇOIS LOUIS GRANDJEAN, of Bienne,. 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 drawings left with
my Provisional Specification and to the letters and figures marked thereon, that
is to say:
.
J.
This invention consists of a watch-mechanism in which the escapement-regulator,
the seconds hand, and the hand setting mechanism are essentially improved.
In the drawings filed with my Provisional Specification, Fig. 1 is a top view of my
improved watch mechanism in which is shewn the arrangement of my improved
escapement regulator and the movers intended to act upon the seconds hand, said hand
having its axis placed in the centre of the watch.
Fig. 2 shews the hand-setting mechanism, as seen when the dial is removed.
Fig. 3 is a plan, and Fig. 4 a cross section of the improved regulator, and of the
balance-bridge, on an exaggerated scale.
In all the figures similar letters refer to similar pieces.
The balance-bridge or cock A is provided with an annular projection b, the inner
edge of which is bevelled, as shewn in fig. 4, and is provided with three entrances or
cuts-out, the purpose of which is to give passage to the arms of the regulator B, the
central part of which enters into the ring b. The regulator B, is characterized by its
openings or cuts-out c, c, which transform its central part into an elastic ring d
provided with an external bevil to which is connected the concentric ring f, by
means of the full part e. The said ring which is a part of the regulator replaces
the so-called "coqueret," that is to say the metallic disc which is usually screwed upon
the balance bridge to affix thereon the stone C, upon which the upper end of the
balance wheel axis bears.
The outer bevil of 'd is made so as to correspond to the inner bevil of b, and the
elastic ring d is provided with two projections d¹ and d" which may be seized with a
pair of pliers so as to compress the elastic ring d when the same is to be placed into
the bevelled ring b; or removed therefrom.
As the central part bears upon the stone C, the latter is fixed in its place by
affixing the regulator, and is released when the regulator is removed. This is of
great importance as the stone C must often be taken out and examined by the watch-
maker, either when the watch is to be regulated, or when the escapement is to be
repaired, the stone C replaced, &c.
I
In order to provide the watch with a seconds hand, placed in the centre, arrange
the seconds, wheel E as shewn in fig. 1 so as to have it passing over the half plate X
and gearing into a pinion F which is affixed to an axis placed in the hollow axis of
the centre wheel G, and bearing at its other end the seconds hand S.

page_text: The main spring is wound up by turning the stem. D, the rotation of which is
transmitted to the wheel L which is affixed to the mainspring axis, by means of the
pinion H, the wheel I having a fixed pivot.i, and the oscillating wheel J having its
pivot fixed to the arm,k³, of the oscillating bridge K. The latter oscillates around
the pivot screw i, of wheel I, and is acted upon by a spring N. which causes the
wheel J to gear into the teeth of the wheel L as long as the oscillating bridge K is
not acted upon.
The arm of K has a pin or projection p engaging into a circular groove of the
stem D (see figs. 2ª and 2b) and when traction is effected upon the latter the oscillating
arm of the bridge K is, displaced, so as to put the wheel J into gear with
the minute wheel P (as shewn by dotted lines in Fig. 2). As long as the
stem D is held in this position the wheels may be set by turning the stem,
and as soon as the stem is released the wheels fall back into their first
position, so that it cannot happen, as occurs in similar hand setting-mechanism,
that one having forgotten to replace the stem vatrest, one displaces the hands
unintentionally.
The bridge K is further provided with an arm ³ upon which there may be a pusher
pressing, as shewn by the.arrow O, and putting into action the hand-setting mechanism,
in place of doing so by traction effected on the stem.
Having now described my Invention and in what manner the
I claim
:
.C
same may be performed
"
The several improvements in watch mechanism substantially as described and as
shewn with reference to the accompanying drawings.