IMPROVEMENTS IN CHRONOGRAPH WATCHES
Year: 1884

page_text: I AMI GOY-BLANC, of Geneva Switzerland Watchmaker do hereby declare
the nature of my said Invention for IMPROVEMENTS IN CHRONOGRAPH WATCHES
to be as follows:-
The object of my invention is to effect improvements in the construction of
chronograph watches.
My improved chronograph watches are fitted with the usual mechanism for
shewing the time.
Two additional hands are provided, one of which indicates seconds on the large
dial, and which rotates once in a minute. This hand is hereinafter referred to as
"hand No. 1." The other additional hand is smaller, and has a small dial to itself,
divided into five equal parts. This hand revolves once in a second, and is herein
after referred to as "hand No. 2."
The hand No. 1 is fitted to a sleeve, to which also a wheel is fitted, both being
carried on the axle of the ordinary minute hand.
A swing lever carries a double pinion, and when this lever is moved by a spring
towards the wheel attached to the sleeve of the hand No. 1, so as to gear there-
with, the pinion engages the centre wheel below and is thereby driven, this motion
being thereby communicated to the wheel which carries the hand No. 1, the latter
is also driven at the necessary speed.
The swing lever is pressed into gear by a spring, but this lever can be moved
against the spring. by hand, whereby the wheels are placed out of gear; the
bands Nos. 1 and 2 are thereby stopped, and may be put back to zero.
Another of the wheels is connected with a wheel fitted to a sleeve upon its axle,
by means of a spiral spring, one end of the spring being fitted to the driving
wheel, and the other end to the driven (sleeve) wheel.
This latter wheel is in gear with a pinion which carries the hand No. 2, the
rotation of which is intermittent, being controlled by a five-ray star-wheel. This
star wheel carries an escapement arm, operating against the teeth of another wheel,
whereby the hand No. 2 is carried round its centre in one second such rotation
being divided into 5 distinct sudden motions of one fifth of a second each.
In a similar manner the hand No. 1 is controlled so that it moves through one
sixtieth of a minute with a sudden movement which take place at the end of such
period.
By the above described arrangement the chronographic apparatus is under
perfect control, and is rendered distinct and simple.

page_text: mprovements in Chronograp watches.
"
I AMI GOY BLANC of Geneva, Switzerland Watchmaker, do hereby declare the
nature of my Invention for IMPROVEMENTS IN CHRONOGRAPH WATCHES," and in
.what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement: -
The object of my invention is to effect improvements in the construction of
chronograph watches.
In carrying out my invention I fit my improved watches with two barrel-
springs, one of which, by means of the ordinary time mechanism and the usual
dials and hands, indicate the ordinary time. The other barrel-spring operates the
stop-mechanism; and in connection therewith one additional dial and two additional
hands are used; one hand being an independent seconds hand, and the other an
independent hand shewing fifths of a second and revolving once in a second; all
governed in their movements by the action of the balance and escapement wheels
and other gear as hereinafter described.
And in order that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which
similar letters and figures of reference indicate corresponding parts.
Fig. 1 is a plan view of the stop watch mechanism, without the starting and
stopping levers and cams.
Fig. 2 is a diagram of the watch face shewing the dials and hands.
Fig. 3 is a side view, partly in section, of the stop mechanism detached from the
bridges and watch plates.
Fig. 4 is a diagram shewing the mechanism from starting stopping and returning
the hands to zero.
Fig. 5 shews the cam, stop lever and star wheels of the fifth of seconds hand,
the cam and lever being in position to allow the star wheels and hands to rotate.
Fig. 6 shews the same parts as Fig. 4 but in the position they assume when the
fifth of seconds hand is at zero.
Fig. 7 represents the star wheels, shewing the pin and slot for connecting
them.
Fig. 8 is a section of the detached parts of the stop mechanism.
A. is the spring-barrel of the stop watch mechanism, and from this barrel motion
is communicated by the train of gearing a b c d e f to the pinion g.
B is the spring-barrel of the ordinary time mechanism of the watch, and this
spring-barrel gives motion to the escapement wheel t³, by means of the wheels u, v, x,
and pinions on the shafts of such wheels. These two spring barrels and trains of
gearing are represented by dotted lines in Fig. 1.
Upon the shaft 2, of the pinion g, there is fitted a wheel h, and upon a tubular
arbor surrounding such shaft there is a wheel : this tubular arbor carries the
independent seconds hand X. Z is a lever carrying the pinion k and wheel k¹, and
this lever is operated by the cam R as herein after explained, to move k and k¹ into
and out of gear with the wheels h and i respectively.

page_text: The wheel h gears into a pinion m, upon the shaft 3, and fixed to this shaft is a
wheel n, which gears into a pinion p upon a shaft 4, and to this shaft 4 is secured
an arm q, which is of such length that its outer end, when the arm is rotating,
will strike one of the teeth of the pinion r, and will be held by such tooth until
the tooth moves out of its way, when the arm will make a complete revolution,
and be detained by the following tooth of the pinion r.
The pinion is fitted upon the shaft 6, and this shaft carries the escapement
wheel, which latter actuates the balance wheel t³, (see Fig. 1) and the number of
teeth of the pinion is such that the arm q can escape from the teeth of r once
only during every five vibrations of the balance wheel, that is to say, once every
second; hence when the pinion k and wheel k¹ are in gear with h and i respec-
tively, and the arm g and pinion p are free to rotate, the spring barrel A and
gearing imparts rotation to g h kk i and m n and 'p, and for each complete
revolution of p and q the hand X is moved over its dial the distance denoting one
second.
Upon a tubular arbor, loosely surrounding the shaft 3, is a wheel o, and this
wheel o is connected to the wheel n by a helical spring n¹, one end of the spring
being secured to the wheel o, and the other end to n. The wheel o gears into a
pinions on the shaft 5, and this shaft 5 carries the fifth of seconds hand Y.
8183 are star wheels, also upon the shaft 5; 8 is firmly secured to the axle or
shaft, but & is loose thereon, and is revolved with the shaft by means of a pin k³
on 8, which passes into a slot in 8¹ (see Figs. 3 and 7). Each star wheel has five
teeth, but one of the teeth of 8 is longer than the other four teeth for the purpose
herein after described, and the star wheel s¹ is in the same plane as the wheel t¹,
which latter is on the shaft 6 of the escapement wheel t³.
When the arm q is released from the pinion r, and makes a revolution as before
mentioned, the partial revolution winds up the spring n' a sufficient amount for
Buch spring in unwinding to rotate the shaft 5 wheels 8' 8 and hand Y a complete
revolution, but such shaft can only turn as the teeth of t¹ allow the teeth of a¹ to
escape successively.
The teeth of t¹ are so proportioned that every fifth of a second a tooth of the
star wheel s¹ escapes from t¹, hence as a¹ has five teeth, it, and the hand Y, make
a complete revolution once every second, the hand Y effecting sudden movements
of fifths of a second each.
To start stop and bring the hands X Y to zero, I make use of the following
arrangements. The lever 12 is pivoted at 10, and the end of its longer arm is
adjacent to a heart eam h³, which is secured to the tubular arbor of the hand X;
the short arm of the lever bears against the eam R, which is provided with
projections and depressions as usual in eams of this character.
The shaft 12 of R carries the eames R¹ R³ also.
13 is a lever, one arm of which bears against R³, and the other arm has a toothed
end 14 adjacent to the star wheel &. is also a two armed lever, one arm bearing
against R³ and the outer end of the arm is adjacent to the path of the arm q.
STARTING THE STOP MECHANISM.
When the push piece do is pressed upon it acts upon the ratchet wheel d³, and
partially rotates the eams R, R¹ R2, which in turn actuate the levers as follows:-
Z brings the wheels K, K¹ into gear with the wheels h. i:-1 releases the heart

page_text: spring, and has thereby disconnected the pinions K. K¹ from h and i and the
hand X stopped has been moved into the path of and thereby stopped the arm q
and the toothed end 14 of 13 has been moved between two of the teeth of s³, and
thereby stopped its rotation and also the hand Y-12 remains out of gear.
RETURNING THE HANDS TO ZERO.
When the push piece is pressed upon the third time, the eams R R¹ R* are
turned, and the lever is brought down by its spring; and acts upon the heart
eam hª and brings the hand X to zero. The lever is moved to the position
shown in Fig. 6, with its toothed end 14 in the path of the long tooth of 82, and
the unwinding of the spring n¹ turns the wheel & until its long tooth strikes the
tooth 14 of 13, when its motion is stopped as indicated in fig. 6 and the hand Y is
at zero.
In order that the star wheel s¹ may not stop the wheel t' and time mechanism
after 83 has been stopped, the slot in s¹, before referred to is provided, which slot
is of such a length that it allows s¹ to be turned by t¹ the distance necessary for t¹
to rotate, without striking the teeth of 8¹.
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. The combination with the spring barrels, and the stop and time gearing trains
respectively, of the arbor 2 and its pinion g and wheel h, the wheel i and its
tubular arbor surrounding the shaft 2, and the hand ✗; the shaft 3 and its
pinion m and wheel n; the shaft 6 and pinion r; the the shaft 4, pinion p and arm q
and means for starting stopping and returning the hand X to zero, substantially as
herein before described and shewn on the drawings.
2. The combination with the spring barrels and the stop and time gearing trains
of the arbor 2 and its pinion g and wheel h; the wheel i and its tubular arbor
surrounding the shaft 2 and the hand X, the shaft 3 and its pinion m and wheel n,
the wheel o loose upon the shaft 3, the helical spring n¹ connecting the wheels n
and o; the shaft 6, pinion r, and wheel t'; the shaft 4. pinion p and arm q; the
shaft 5 carrying the hand Y, the pinions and star wheels on the shaft 5, and the
arrangements for starting stopping and returning the hands to zero substantially
as herein before described and shewn on the drawings.
3. The combination in a stop watch for indicating seconds and fractions of a
second, of the shaft 3 and its pinion m and fixed wheel n, the wheel o loose upon
the shaft 3, and the helical spring n¹ connecting the wheels n and o, such shaft
and other parts being in the train of gearing between the arbors of the hands X
and Y substantially as and for the purposes hereinbefore described and shown on
the drawings.
4. The general combination and arrangement of the several and respective parts,
together forming my improvements in chronograph watches, substantially as herein
before described and shewn on the drawings.
Dated thi. 8th day of Santamber 1885
GEO. DOWNING,
Agent for Applicant.