NEW-INVENTED MOVEMT OF REPEATING WATCHES, AND ALL OTHER SORTS OF WATCHES, ON A NEW PRINCIPLE, NEVER HERETOFORE USED, WHICH GIVES A MUCH LIGHTER AND KINDER
Year: 1755

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, greeting.
WHEREAS His present Majesty King George the Second, by His Letters
Patent dated at Westm', the First day of March, in the twenty-eighth year of
His reign, of His especial grace, certain knowledge, and mere motion, did, for
Himself, His heirs and successors, give and grant unto me, JOSEPH BOSLEY,
of Leadenhall Street, in the City of London, Watchmaker, my exors, adiñiors,
and assigns, His special license, full power, sole priviledge and authority, that
the said Joseph Bosley, my exors, adiñiors, and assigns, and every of us, by
himself and themselves, or by my or their deputy or deputies, servants or agents,
or such other as I, my exors or assigns, should at any time agree with, and
no others, from time to time and at all times hereafter during the term of four-
teen years from the date of the said Patent, should and lawfully might make,.
use, and exercise, and vend, within that part of His Kingdom of Great Britain
called England, His Dominion of Wales, and Town of Berwick-upon-Tweed,
in such manner as to me, the said Joseph Bosley, my exors, admors, or
assigns, or any of us, shou'd in our discretions seem meet, my "NEW-INVENTED
MOVEMT OF REPEATING WATCHES, AND ALL OTHER SORTS OF WATCHES, ON A NEW
PRINCIPLE, NEVER HERETOFORE USED, WHICH GIVES A MUCH LIGHTER AND KINDER

page_text: FRICTION ALL THROUGH THE WORK, CARRYS A GREATER POWER TO THE BALLANCE,
GOES MUCH MORE REGULAR, LASTS LONGER WITHOUT REPAIR, AND COSTS BUT LITTLE
MORE MONEY THAN REPEATING OR OTHER WATCHES MADE ON ANY PRINCIPLE HERE-
TOFORE USED; AND ALSO MY NEW-INVENTED SLIDE TO WATCHES, WHICH IS MORE IN-
TELLIGIBLE AND CERTAIN, TO REGULATE WATCHES BY," and which I, by long study,
applicačon, labour, and many experimt, and at great expence, found out and
brought to perfection, with such other powers, liberties, and priviledges as is
and are in and by the said Letters Patent expressed; subject nevertheless
to a proviso therein contained, that if I, the said Joseph Bosley, should not
particularly describe and ascertain the nature of my said Inventions, and in
what manner the same are to be performed, by an instrum' in writing under
my hand and seal, and cause the same to be inrolled in His said Majesty's
High Court of Chancery, within four calendar months next and immediately
after the late of the said Letters Patent, that then the said Letters
Patent, and all liberties and advantages whatever thereby granted, should
utterly cease, determine, and become void, as in and by the said Letters
Patent, whereunto relačon being had, may and doth more fully and at large
appear.
NOW KNOW YE, that I, the said Joseph Bosley, do hereby declare that
the said new-invented movem of repeating and other watches consists of
a change or increase of the numbers of the teeth of all my small pinions, and
the increase of their size; also to those commonly heretofore used in watches,
or that ever was used in watches, before the advertizem of this present
Invention in the Gazette, and before the granting these Letters Patent, by any
other person whomsover; and the number of the teeth to the wheels and
pinions of the several sorts of watches, to be made according to my said new-
invented movem', are described as hereafter written, as plain horizontal watches,
repeating horizontal watches, and all other horizontal watches, also of plain
full-sized watches with common pallets, and small-sized plain watches with
common palletts, and repeating watches with common palletts, sections of the
said wheels and pinions, and what number of teeth in the wheels and pinions
I have chosen and use as rendring the movem' most true and perfect, as
hereafter laid down.
I have also hereunder divided and described my new-invented slide to
plain horizontal and to plain pallet watches, and the same is to be used to
repeating horizontal and to repeating common pallet watches, which slide
has no wheel to it. The index turns upon a brass sockett, and points to
an arch of a circle, divided with the word faster on one end, and the word
slower on the other; and the index may be made with a cock to keep it

page_text: The watches that have been commonly made heretofore have had in all
their small pinions six teeth only in number, and their circumference has been
very small, which requires the tooth of the wheel that leads it to go very near
the centre, the consequence of which is a very hard friction, which I have
taken off by increasing the number of the teeth in my small pinions, and also
by increasing of their size, as follows:-
The number of the teeth in all my small pinions through the whole
movem to a full-sized plain pallett watch are twelve; the number of teeth
in all my small pinions through the whole movem to a very small plain pallett
watch, and to a repeating pallett watch, are ten for the going part; the
number of teeth in all my small pinions through the whole movem of a
plain horizontal watch, and of a repeating horizontal watch, are ten for the
going part. Now these pinions being increased in their number of teeth so
much, become a great deal larger, and the wheel that leads them goes as
much farther from the centre, in proportion as the pinions are increased in
their size. And though I am obliged to put a wheel and pinion more than
is commonly used, that the watch may not go down before the usual time, yet
each wheel, leading its pinion so much farther from the centre, has so lessened
the friction, that the last member of the watch which is last moved, or farthest
from the spring, which we call the balance, is increased in its weight, and
shews thereby the quantity of friction to be less through the whole work, and
the wear of the watch to be less also. Then the numbers of the teeth of
the pinions being increased from six to ten and twelve, the leading tooth of the
wheel does not come into action or friction with the led tooth of the pinion so
soon, nor does it last so long in action before it leaves it, or the leader and the
led not touching till their directions become nearly in a right line, must be a
friction of a lighter and more regular nature. And the advantageous con-
sequence of this great diminition and better sort of friction, will be apparently

page_text: manifested by the truer motion and performance of the watch. Now as
the number of the teeth in the small pinions of the watches commonly
heretofore made are but six, the leading tooth of the wheel comes into action
or friction with the led tooth of the pinion sooner, and lasts longer than when
the pinions are of ten and twelve teeth, and the leading tooth of the wheel at
first touching the led tooth of the pinion adheres more angularly, which pro-
duces a greater and more irregular friction, and, consequently, not regularity
can be expected in the motion or performance of such watch. But as the im-
provem' I have made and herein set forth may be effected by other numbers
than are hereafter expressed, with my assisting wheel and pinion, more than
commonly used, and as thereby innovations may be made upon my principles
greatly to my detrim, and as the several varietys of the numbers of teeth
of the wheels and pinions that may be used can't be expressed in the compass
of this Instrum of inrollmt, it is hereby observed and incerted, that the
number of the teeth in the wheels and pinions, producing the above-menconed
good effect, may be lessened or increased by my special license, only given to
such workman or workmen as I shall think proper for that purpose; and this
Invenčon in order to prevent any other person not authorized by me from
any encroachms upon or illegal uses or applications of this my improvem³,
contrary to the true intent, meaning, and power of my said Patent. N.B. The
scapem of the ballance of these my horizontal watches and common pallet
watches is the same as heretofore made, save only that the ballance wheel
of both of them goes the contrary way.
The callapar and description of the number of teeth in the wheels and
pinions of my new-invented plain horizontal, repeating horizontal, and of other
my said new horizontal watches, are as hereunder written and described.
MARKS OF REFERENCE TO THE HORIZONTAL FIGURE (1) :-
A, the barrell.
B, the first or great wheel, containing
C, the centre, or second wheel
D, the third wheel
Teeth.
48
54
52
E, the fourth wheel, more than common
48
F, the fifth wheel
48
G, the ballance wheel of
13
The second wheell pinion of
The third of
The fourth, or more than usual
The fifth of
The ballance
12
-
10
10
10
10

page_text: The callaper and description of the number of to
ions of my full size common pallet plain watches, arc
scribed.
MARKS OF REFERRENCE TO THE COMMON PALLET
A, the barrell.
B, the first or great wheel of
C, the second or centre wheel of
D, the third wheel of
E, the fourth or wheel more than usual
F, the fifth or contrate wheel
G, the ballance wheel of
The second wheel pinion
The third
-
The fourth, or pinion more than usual
The fifth
The ballance
The numbers of the teeth in the wheels and pini
ith common pallets, and of my repeating watches
e,-
The first or great wheel of
The centre, or second wheel of
The third wheel of
The fourth, or wheel more than usual
The fifth or contrate wheel
The ballance wheel of
The second wheel pinion
The third of
The fourth, or more than usual
The fifth or contrade
The ballance of
-
ealed and delivered, being first duly
stament in the urosonce of us
The callaper and description of the number of teeth in the wheels and
inions of my full size common pallet plain watches, are hereunder written and
escribed.
MARKS OF REFERRENCE TO THE COMMON PALLETT, FIGURE No. 2.
A, the barrell.
B, the first or great wheel of
C, the second or centre wheel of
D, the third wheel of
E, the fourth or wheel more than usual
F, the fifth or contrate wheel
G, the ballance wheel of
-
Teeth.
-
48
60
60
-
60
56
-
15
-
12
-
12
12
-
12
-
12
The second wheel pinion
The third
The fourth, or pinion more than usual
The fifth
The ballance
The numbers of the teeth in the wheels and pinions of my small watch
with common pallets, and of my repeating watches with common pallets,
are,-
The first or great wheel of
The centre, or second wheel of
The third wheel of
The fourth, or wheel more than usual
The fifth or contrate wheel
Teeth.
48
-
50
- 50
-
The ballance wheel of
The second wheel pinion
The third of
The fourth, or more than usual
The fifth or contrade
The ballance of
-
Sealed and delivered, being first duly
stampt, in the presence of us,
L
48
-
48
-
15
-
12
-
10
-
10
-
10
10

page_text: AND BE IT REMEMBRED, that the Twenty-first day of June, in the
year above written, the aforesaid Joseph Bosley came before our said Lord
the King in His Chancery, and acknowledged the Invenĉon aforesaid, and
all and every thing therein contained and specifyed, in form above written.
And also the Invenčon aforesaid was stampt according to the tenor of the
Statute made in the sixth year of the reign of the late King and Queen
William and Mary of England, and so forth.