CERTAIN IMPROVEMENTS IN WATCHES AND TIMEKEEPERS
Year: 1829

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
WESTWOOD, of Princes Street, Leicester Square, in the County of Middlesex,
Watchmaker, send greeting.
WHEREAS His present Majesty King George the Fourth, in and by
His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twenty-third day of September last, for Himself, His
heirs and successors, did give and grant unto me, the said Robert Westwood,
His especial license, full power, sole privilege and authority, that I, the said
Robert Westwood, my executors, administrators, and assigns, and every of
them, by myself and themselves, or by my and their deputy or deputies,
servants or agents, or such others as I, the said Robert Westwood, .my
executors, administrators, or assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term of years
therein unexpired, should and lawfully might make, use, exercise, and vend,
within England, Wales, and the Town of Berwick-upon-Tweed, my Invention
of CERTAIN IMPROVEMENTS IN WATCHES AND TIMEKEEPERS;" in which said
Letters Patent there is contained a proviso obliging me, the said Robert
Westwood, by an instrument in writing under my hand and seal, particularly
to describe and ascertain the nature of my said Invention, and in what manner
the same is to be performed, and to cause the same to be enrolled in His
Majesty's High Court of Chancery within six calendar months next and
immediately after the date of the said recited Letters Patent, as in and by
the same, reference being thereto had, will more fully appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Robert Westwood, do hereby declare that the nature of my said Invention,

page_text: and the manner in which the same is to be performed, is described and-ascer-
tained in the annexed Diagrams and the following explanations thereof.
As the individual parts composing a watch movement are already well.
known and in use, I shall only describe the manner in which they are arranged
and combined in my patent watches and timekeepers, which is as follows;
that is to say:The frame consists of two circular plates, united by pillars in
the usual manner.
..
Fig. 1 represents the pillar plate on which the calliper is drawn. The
circle A represents the barrel. It occupies more than two thirds of the
diameter of the frame, and the usual height between the plates, and is what is
usually termed a going barrel, having teeth on its edge, and constituting the
first or great wheel. The circles C, D,-and E represent three wheels, and
pinions, usually denominated in thirty-hour movements the centre, the third,
and the fourth, from which they do not differ as far as regards their uses; and
the circle F represents the escapement wheel and pinion. These wheels and
pinions are placed under the barrel; that is to say, between it and the dial
plate, in caveties formed in the pillar plate, with cocks or bars to receive their
pivots, the space between them and the upper plate being occupied by the
barrel. The-motion-is communicated from the barrel to the wheels under it
by means of an intervening wheel and pinion, represented by the circle B.
The teeth on the edge of the barrel act in the pinion B, and the wheel B,
which is sunk, acts in the centre pinion. By referring to the Diagram,
Fig, it will be seen that the diameter of the wheel B. extends from its
proper depth in the centre pinion to the edge of the. plate; and, as it cannot
be placed at a greater distance from the centre of the barrel, it therefore
limits the size of the barrel, but, by introducing an additional wheel to com-
municate the motion from the wheel B to the centre wheel, there will be
for a barrel of still larger dimensions.
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Fig, & represents a calliper of a movement with the additional wheel, and a
barrel of more than three fourths of the diameter of the frame. The wheel B
(which is smaller in diameter than in Fig.1), acts in the pinion of the additional
wheel, represented by the circle Z, and the wheel Z acts in the teeth of the centre
wheel, which has no pinion, only a plain arbor. The additional wheel, being
under the barrel, is sunk with its pinion, in the same manner as the centre,
third, and fourth before-described. The relative velocities of the centre wheel
and barrel are the same in both callipers; namely, sixty-four to one. The
ratios. of the intermediate wheels and pinions may be varied without
material consequence. The upper plate receives the pivots of the barrel arbor
and the pinion B in both callipers in the usual manner, and it also bears the
jewelled cock in which the balance.pivot acts.
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any

page_text: The points upon which I ground my right of exclusive privilege to the
above Invention and improvements, under my aforesaid recited Patent, are,
the arrangement of the wheels and pinions, as far as regards their being
placed so as to act under the barrel; that is to say, between it and the dial
plate, as before described, and shewn in the annexed Diagrams, thereby
admitting within the limits of a pocket watch of the usual size a maintaining
power of sufficient strength, with one winding up, to keep up a vigorous motion
in the balance for the space of eight days, or for a longer period if required.
In witness whereof, I have hereto set my hand and seal, the Twenty-
second day of March, in the year of our Lord One thousand eight
hundred and thirty.
ROBERT (L.S.) WESTWOOD.
Signed and sealed, by the within-
named Robert Westwood (being
first duly stamped), in the pre-
sence of
JAMES SHEARER,
Watchmaker,
23, Devonshire Street,
Queen Square,
DL
J. GREGORY,
Clerk to Mr. Oriel,
Attorney-at-Law,
36, Alfred Place,
Bedford Square.
AND BE IT REMEMBERED, that on the same Twenty-second day of
March, in the year above mentioned, the aforesaid Robert Westwood came
before our Lord the King in His Chancery, and acknowledged the Speci-
fication aforesaid, and all and every thing therein contained, in form above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute in that case made and provided.