Year: 1886

page_text: Date of Application, 30th June, 1886.
Complete Left, 30th Apr., 1887.
Complete Accepted, 31st May, 1887.
I WILLIAM HENRY DOUGLAS of Stourbridge in the County of Worcester Watch
Maker, do hereby declare the nature of this invention to be as follows :-
The object of this invention is to simplify the construction increase the reliability
and facilitate the manufacture of chronographs.
My invention consists in adding a coarse toothed wheel to the train of the watch to
reverse the action of the watch, thus enabling me to dispense with the wheel or wheels
known as the intermediate wheel or wheels of chronographs. That is to say by using
two fourth wheels, instead of one, the one gearing into the other I reverse the action
of the wheel taking into the escapement, and thus dispense with the intermediate
chronograph wheel otherwise necessary to obtain a forward movement of the long
centre seconds hand. Or I can obtain the same result by using an additional "third
wheel" gearing into the third wheel teeth and the fourth wheel pinion.
By these means I obtain a steadier action of the long seconds hand and a perfectly
detached chronograph.
..
تيمم
1
0 T
1000
PAYNE & TALBOT,
4 & 5, Arcade Chambers,
Corporation Street, Birmingham,
Agents for the Applicant.

page_text: I WILLIAM HENRY DOUGLAS of Stourbridge in the County of Worcester, 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 ascertained in and by the following
statement, reference being had to the accompanying drawings and to the letters and
figures marked thereon:-
The object of this invention is to simplify the construction increase the reliability
and facilitate the manufacture of chronographs. My invention consists in adding a
coarse toothed wheel to the train of the watch thus enabling me to dispense with the
wheel or wheels, known as the intermediate wheel or wheels of Chronographs, that is
to say by using two fourth wheels instead of one, the one gearing into the other, I
reverse the action of the wheel taking into the escapement and thus dispense with the
intermediate chronograph wheel otherwise necessary to obtain a forward movement of
the long centre seconds hand, or I can obtain the same result by using an additional
third wheel gearing into the third wheel teeth and the fourth wheel pinion.
By these means I obtain a steadier action of the long seconds hand and a perfectly
detached chronograph.
Referring to the drawings Fig. 1 represents the pillar plate of an ordinary three
quarter plate watch shewing the relative positions of the centre wheel (a) third
wheel (b) and the fourth wheel (c) Fig. 2 shews the pillar plate of a similar three
quarter plate movement in which. ne position of the centre wheel (a) and the third
wheel (b) are unchanged but the fourth wheel (c) with its pinion is removed round
the periphery of the third wheel, (b) to a distance about equal to its own diameter
from that shewn in Fig. 1.
In the position upon Fig. 2. indicated in Fig. 1. as occupied by the fourth wheel (c)
is planted an extra or fifth wheel (d) of the same diameter & same number of teeth as
the fourth wheel (c). This extra wheel (d) is mounted upon an arbor and has no
pinion the height of it upon the arbor is arranged so that it will gear into the fourth
wheel (c), this extra or fifth wheel (d) now becomes the driving wheel for the
escapement (e) and gears into the escape wheel pinion just as the fourth wheel
ordinarily does.

page_text: The upper portion of the arbor of this extra or fifth wheel (d) is prolonged some
what and is supported by a bridge and upon this upper portion and immediately under
the bridge a bevelled chronograph wheel is mounted which becomes the driver to
opperate an equal sized chronograph wheel upon the axis on which the centre seconds
hand is fixed which hand will now without the use of an intermediate hand more in a
forward direction.
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,
The introduction of an extra or fifth wheel for the train of a watch in order to
obviate the use of an intermediate wheel in the chronograph train.
Dated this 29th of April 1887.
PAYNE & TALBOT,
7, Cherry Street, Birmingham,
Agents for the Applicant.
PAYNE & TALBOT,
7, Cherry Street, Birmingham,
Agents for the Applicant.