CERTAIN IMPROVEMENTS IN THE CONSTRUCTION OR MECHANISM OF CHRONOMETERS; WATCHES, AND CLOCKS, AND WHICH MAY ALSO BE APPLICABLE TO OTHER MECHA- NICAL PURPOSES
Year: 1834

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, 1, THOMAS
BAKER, of Upper Stamford Street, in the County of Surry, Gentleman, send
greeting.
WHEREAS His present most Excellent Majesty King William the Fourth;
by His Royal Letters Patent under the Great Seal of Great Britain, bearing
date at Westminster, the Twentieth day of March, in the fourth year of
His reign, did, for Himself, His heirs and successors, give and grant
unto me, the said Thomas Baker, His especial licence, full power, and
authority, that I, the said Thomas Baker, my executors; administrators,
and assigns, or such others as I, the said Thomas Baker, my executors,
administrators, or assigns, should at any time agree with, and no others,
from time to time and at all times during the term of years therein men-
tioned, should and lawfully might make, use, exercise, and vend, within
England, Wales, and the Town of Berwick-upon-Tweed, an Invention of
"CERTAIN IMPROVEMENTS IN THE CONSTRUCTION OR MECHANISM OF CHRONOMETERS;
WATCHES, AND CLOCKS, AND WHICH MAY ALSO BE APPLICABLE TO OTHER MECHA-
NICAL PURPOSES," being a communication made to me by a Foreigner residing
abroad; in which said Letters Patent is contained a proviso that I, the
said Thomas Baker, shall cause a particular description of the nature of the
said Invention, and in what manner the same is to be performed, to be

page_text: inrolled in His said Majesty's High Court of Chancery with six calendar
months next and immediately after the date of the said in part recited
Letters Patent, as in and by the same, reference being thereunto had, will
more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Thomas Baker, do hereby declare that the nature of the said Invention, and
in what manner the same is to be performed, is particularly described and
ascertained in and by the following description thereof, reference being had
to the Drawing hereunto annexed and to the letters and figures marked
thereon (that is to say):-
The Invention of Certain Improvements in the Construction or Mechanism
of Chronometers, Watches, and Clocks, and which may also be applied to
other Mechanical Purposes, has been communicated to me in the following
words "This Invention consists in the application of the excentric move-
ment, and that produced by the centrifugal force in the construction of
chronometers, timekeepers, clocks, and watches, and by which means I
avoid a number of inconveniencies attending the above-named machines,
and render them less liable to disarrangement. To elucidate this con-
struction I place on one of the arms of the wheel, Figure 1, a pivot A.
This pivot is connected by the excentric bar B to the end of the lever C
moving freely on its axis, the wheel Figure 1 being put in motion by the main
spring and wheels connected with it. Every revolution of the excentric wheel
mark and beat seconds the same as a pendulum of a clock of the usual length.
This excentric communicates by pinions and wheels to the balance shewn in
Figure 2. In that Figure E, E, are regulating balls connected to the
balance D at its extremities, and by means of the lever G. G, which moves
freely on the pin S, the centrifugal force causes the balls E to fly outward.
The tooth I of the lever G by these means is pressed on the spring F, and
which prepares it to act against the fixed plate M; by this means a constant
and uniform movement is produced on the balance, and the number of its
revolutions per minuto determined.
Figure 3 represents the outlines of a caliper for a chronometer, which,
however, may be varied according to the will of the artist, in this as well
as in all other timepieces. The Invention consists in the application of the
excentric movement, and that of centrifugal force, to all instruments made
use of for tho above purpose.
Reference to Figuro 3.-a, barrell. b, center pinion. c, center wheel. d,
second wheel pinion. c, second wheel. f. pinion of the third wheel.
9, third
wheel. h, pinion of the fourth wheel. i, fourth wheel. j, excentric pinion.