Improved Watch Movement.
Year: 1898

page_text: Date of Application, 29th Jan., 1898-Accepted, 27th Aug.,
1898
Improved Watch Movement.
I, HILAIRE CHEDAL, Clock and Watch Maker, Moutiers, Haute-Savoie, in the
Republic of France, 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: —
This invention for an improved watch movement, has for its object to simplify
the various parts of the movement especially the train and the winding and
setting mechanism, and to allow, in the arrangement of the said train, of the
employment of a large barrel with a diameter greater than the radius of the
movement itself, as well as the use of a balance of relatively large diameter,
which is of advantage in the regulating of the watch.
In the accompanying drawings Fig. I is a plan of the side opposite to the dial
of a watch movement constructed according to this invention, Fig. II is a plan
of the dial side of the same, and Figs. III and IV show respectively in plan,
and section along the line XX, to an enlarged scale, a transmission of gearing
arrangement.
The escape wheel E, Fig. I is actuated by the barrel B through the medium
of the pinions and wheels b, C, c, D and d; these parts being pivotted between
the plate A and the bridge or half plate P. The straight line escapement, that
is to say, the axis e of the wheel, f of the fork, or crutch, and F of the balance,
belonging to which are in the same straight line, may be either an anchor escape-
ment or a two pin escapement of the kind known by the name "Roskopf."
The barrel B controls the motion work by means of transmission arrangement
composed of the wheel 5 which engages with the pinion b, the pinion 6 engaging
with the wheel 3 which moves the hour hand, and the wheel 7 engaging with
the cannon pinion 4 which moves the minute hand. This transmission arrange-
ment, which passes through a circular opening in the plate A, is pivotted
between two small cocks or bridges p and p¹ fixed to the plate A; the wheel
is adjusted to run frictionally on the wheel 7 by means of a spring 8 pressing
against the shoulder 10 of the shaft 11 and the exterior surface of the wheel 5
as represented in Fig. III and IV of the drawings. This spring is put in place
by means of the aperture 12 formed therein, and it is attached firmly to the
wheel 5 by means of its slightly bent point 13 which enters a hole 14 in the said
wheel. This adjustment enables the motion work for setting the hour to be
manipulated, the wheel 7 and the pinion 6 turning in this case loosely on the
wheel 5 which is stopped by the pinion 6 and the barrel.
The winding of the barrel and the setting of the hour are effected by the wind-
ing stem T which carries on its lower part a pinion G engaging constantly with
a wheel g, Fig. II, pivotted on the crown h of a detent H which is itself pivotted
on the screw V. A wheel i also pivotted on the detent engages with the wheel g.
The winding stem is adjusted to run smoothly in a tube such as t, attached to
the interior of the pendant of the case; it can thus be adjusted direct in the
pendant itself. This stem forms part with the detent H by means of its pinion G

page_text: which enters partially into an inlet m of suitable shape, formed in the said
detent.
By means of its shoulder r, a spring R keeps the nose of the detent against
the edge of a hollow S in the plate. In this position the winding of the barrel
is effected by the wheel i engaging with the ratchet wheel 2, the stem T being
thus rotated in the direction indicated by the arrow. When this stem is rotated
in the opposite direction, the engagement ceases, the resistance encountered by
the teeth of the wheel i against those of the ratchet wheel 2, causing the wheel i
to move away and the detent with it.
The setting is effected by putting the stem T, which acts on the detent, into
the position indicated in the drawing by dotted lines; the wheel is no longer
in contact with the ratchet wheel 2, but comes into engagement with the wheel 7
as seen above, actuates the motion work, and the part u of the detent is arrested
by the edge y of a hollow z in the plate. The detent is arrested in this position
by the shoulder r of the spring which is brought under its nose n¹.
and is furnished with a tail-piece 16
The detent may be perforated in the centre with a hole K to allow of the fixing
of a screw o the head of which supports the detent; this screw is shown in
section in the drawing (Fig. II) for clearness.
The click 15 supports the ratchet wheel
which is operated for releasing the barrel.
The form and proportions of this movement and of its various parts may differ.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. In a watch movement, the arrangement of operating an escapement wheel by
a large barrel which actuates three pinions and two wheels, substantially as
described.
2. In a watch movement, the arrangement for transmitting the motion of the
barrel to the motion work, characterised specially by the gearing contrivance
consisting of the pinion 6 and of the wheels 7 and 5, this latter being adjusted
to run frictionally on the first by means of a spring such as 8.
3. In a watch movement, the winding and setting mechanism characterised by
a detent H carrying two wheels g, i engaging with each other and with a pinion &
forming part with the winding-stem T, the stem T operating the detent and trans-
mitting, (according as it may be pushed or pulled) its motion to the barrel
ratchet 2 for the re-winding, and to the gearing contrivance claimed under
Claim 2 for the setting; the stability of the two positions of the detent being
assured by a spring R substantially as described.
4. The improved watch movement substantially as described with reference
to the drawings.
Dated this 29th day of January 1898.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.