A Combined Watch and Chronograph with Keyless Mechanism.
Year: 1891

page_text: Date of Application, 7th May, 1891
Complete Specification Left, 6th Feb., 1892-Accepted, 12th Mar., 1892
PROVISIONAL SPECIFICATION.
A Combined Watch and Chronograph with Keyless Mechanism.
I WILLIAM HENRY DOUGLAS, of 59 High Street, Stourbridge, in the County
of Stafford, Watch Maker, do hereby declare the nature of this invention to be as
follows:-
:-
My invention relates to a combination of a watch and chronograph in which I
arrange and apply stem winding and hand setting mechanism.
In chronographs as at present constructed without fine teethed gearing wheels
the dials and mechanism are only suitable for use in a chronograph, and this is
found in practice to be a great disadvantage as those using the chronograph have
also to carry a watch. By my invention am enabled to apply chronograph
arrangements of a simple character to a watch with hands indicating hours minutes
and seconds in the ordinary way or by means of a specially arranged dial I
indicate hours, minutes and seconds, while I render one or more of the hands avail-
able for timing purposes.
In one mode of carrying my invention into effect I arrange a chronograph watch
with three dials; two small dials upon a large one; one dial indicating hours and
minutes, each hour being divided so that one hand indicates minutes by a complete
revolution while the small hand indicates hours; another dial is divided in ten and
a complete revolution of the hand indicates ten minutes. The large hand rotates
completely round in one minute and the dial is divided and indicates seconds and
fractions of a second.
The starting, stopping and returning mechanism may be varied to some extent
but prefer a simple arrangement. depending for its action upon successive
depressions of the stem button. Three depressions complete the operations; the
first starts the chronograph arrangements; the second stops the mechanism; and
the third rotates the hands to zero to be in position for a new reading or observa-
tion. These actions are accomplished by means of suitable levers and a ratchet
wheel with cam surfaces. A pawl from the button, actuates the ratchet wheel to
move one tooth at each depression of the button and the cam surfaces carried by
the ratchet wheel control levers at the proper time, one lever stops the chronograph
by applying a light spring to the balance, another double ended lever rotates the
hands to zero position by action on two heart shaped cams or discs attached to the
hand while the start is effected by liberating the balance. The stem winding
mechanism comprises a plate carrying a train of two or more toothed wheels
actuated by a toothed wheel on the winding stem. The last or third wheel gears
into the toothed wheel attached to the spring and when the button is rotated in
one direction that wheel engages the said wheel and the spring is wound If
however the button be rotated in the opposite direction then the teeth slip, by the
plate carrying the wheels oscillating.
up.
By depression of a push piece or pin the rocking lever is made to engage one of
its wheels with the motion wheel connected with the hands and thereby to permit
of the watch being set.
Instead of using three dials on my combined watch and chronograph I may use
two dials. The large dial having the small and large hour and minute hands as
usual, and a separate seconds hand geared back to the centre and travelling round
the large circle. A small circle on the dial plate in this case is divided to indicate
ten minutes by one complete revolution.
1001
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.

page_text: COMPLETE SPECIFICATION.
A Combined Watch and Chronograph with Keyless Mechanism.
I, WILLIAM HENRY DOUGLAS of 59 High Street Stourbridge in the County of
Stafford Watch Maker, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
My invention relates to a combination of a watch and chronograph in which I
arrange and apply a stem winding and hand setting mechanism.
In chronographs as at present constructed without fine teethed gearing wheels,
the dials and mechanism are only suitable for use in a chronograph, and this is
found in practice to be a great disadvantage, as those using the chronograph have
also to carry a watch.
By my invention I am enabled to apply chronograph arrangements of a simple
character to a watch with hands indicating hours, minutes and seconds in the
ordinary way, or by means of a specially arranged dial I indicate hour minutes,
and seconds while I render one or more of the hands available for timing
purposes.
Referring to the two accompanying sheets of drawings; in one mode of carrying
my invention into effect I arrange a chronograph watch with three dials; two
small dials upon a large one; one dial indicating hours and minutes, each hour
being divided so that one hand indicates minutes by a complete revolution while
the small hand indicates hours; another dial is divided in ten and a complete
revolution of the hand indicates ten minutes. This arrangement is shown at
Figure 6, where A is the dial upon which hours and minutes are indicated, B is
the ten minutes dial and C is the large seconds dial.
Figure 1 is a face view of this combined watch and chronograph with the dial
plate removed, and Figure 3 shows the same view with the bridge piece or plate D
removed to show the mechanism underneath. Figure 5 is a face view of a
combined watch and chronograph in which only two dials are used, and the large
dial indicates both hours and minutes by one pair of hands, while seconds are
indicated by one long hand. C₁ is the long seconds hand, A¹ and A' are the
minutes and hours hand, and B2 is the ten minutes hand. The arrangement of
wheels is shown at Figure 2.
Figure 4 is a back view of the watch showing the general arrangement.
The large hand rotates completely round in one minute and the dial is divided
and indicates seconds and fractions of a second.
The starting, stopping and returning mechanism may be varied to some extent,
but I prefer a simple arrangement depending for its action upon successive
depressions of the stem button a. Three depressions complete the operations; the
first starts the chronograph arrangements; the second stops the mechanism; and
the third rotates the hands to zero to be in position for a new reading or observation.
These actions are accomplished by means of suitable levers b, c, and a ratchet
wheel d with cam surfaces. A pawl from the button a actuates the ratchet
wheel d to move one tooth at each depression of the button, and the cam
surfaces d¹, d¹, d', d' carried by the ratchet wheel control levers b, c at the proper
time, one lever c at the end c¹ stops the chronograph by applying a light spring to
the balance, another double ended lever b rotates the hands to zero position by
action on two heart shaped cams or discs e, e¹ attached to the hands while the start
is effected by liberating the balance. The stem winding mechanism comprises a
plate D carrying a train of two or more toothed wheels centred at 91, 9², and g³
actuated by a toothed wheel g, on the winding stem. The last or third wheel
gears into the toothed wheel g* attached to the spring barrel, and when the button a
is rotated in one direction, that wheel engages the said wheel and the spring is
wound up.
If however, the button be rotated in the opposite direction, then the

page_text: teeth slip by the plate E carrying the wheels oscillating in a well known manner.
By depression of a push piece or pin the rocking lever E is made to engage one of
its wheels with the motion wheel connected with the hands, and thereby to permit
of the watch being set.
In another modification of my invention as shown at Figures 7, 8, and 9 I
arrange the time dial as a small dial at the upper part of the watch and actuate the
hands by an extra pinion and motion wheels, the extra pinion being so placed as
to gear into the main spring barrel. Into the barrel I gear another pinion which
in ordinary circumstances would be the centre wheel pinion, but I place it to one
side of the centre and gear into its wheel the third pinion; into the third wheel I
gear the fourth or seconds pinion, and I arrange this pinion in the centre of the
watch so that I provide a centre seconds hand. The third dial I place at the lower
part of the chronograph watch and I arrange its hand to make one revolution in
ten minutes.
The centres of the three hands are thus in line.
At Figure 7, R is the extra pinion hereinbefore described, and it gears into the
barrel Qand actuates the hands of the dial R'; motion wheels being used in the
usual manner.
The centre seconds hand and the ten minutes dial and hand are clearly shown at
Figure 8.
The sliding or push piece S in the watch case acts upon the small disc U by the
projection T and so oscillates the disc according to its movement. The disc U
carries the spring U', which in one position presses against the balance V and so
stops the watch, while in another position it remains clear of the balance. When
this piece S is moved to release the balance, the spring U₁ gives the balance Va
flick or start so that the watch starts promptly. The disc U is clearly shown in
section at Figure 9.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
(1). Applying a time dial and hands by gearing into the barrel of a chronograph
an extra pinion and arranging the necessary wheels to get the minutes, seconds and
hour wheels in line substantially as hereinbefore described."
(2). A combined thirty hour watch and chronograph with extra pinion to carry
hour and minute hands substantially as hereinbefore described.
(3). In a chronograph watch, a rotating or oscillating disc acted on by a push or
sliding piece and carrying a spring which by pressing against the balance stops the
watch, and by giving a slight impulse to the balance in releasing it starts the
watch again, substantially as described.
Dated this 5th day of February 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicant.