A NEW METHOD OF MAKING WATCHES
Year: 1764

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FRIEDERIECK
KEHLHOFF, late of the Parish of Saint George the Martyr, in the County of
Surry, Watchmaker, send greeting.
WHEREAS I, the said Friederieck Kehlhoff, did, by my Petition, humbly
represent unto His present Majesty King George the Third, that I had, by
great study, labour, and expence, in trying experiments, found out and
invented A NEW METHOD OF MAKING WATCHES," which is constructed on new
principles, and is of great benefit, and in many other respects far superior to
those now used; that in regard I, the said Friederieck Kehlhoff, apprehended
the said Invention would be of publick utility to His said Majesty's subjects,
I therefore most humbly prayed His said Majesty that He would be graciously
pleased to grant unto me, the said Friederick Kehlhoff, my executors,
administrators, and assigns, His Royal Letters Patent under His Great Seal
of Great Britain, for the sole use and benefit of my said Invention within that
part of Great Britain called England, the Dominion of Wales, and Town of
Berwick-upon-Tweed, and also in His said Majesty's Colonies and Plantations
abroad, for the term of fourteen years, according to the Statute in such case
made and provided; His said Majesty being willing to give encouragement to
all arts and inventions which might be for the publick good, was graciously
pleased to condescend to my request, and, therefore, by His Royal Letters
Patent, bearing date at Westminster, the Twenty-ninth day of November,
in the fifth year of His reign, His said Majesty, for Himself, His heirs and
successors, did give and grant unto me, the said Friederieck Kehlhoff, my
executors, administrators, and assigns, Ilis especial licence. full power, sole

page_text: priviledge and authority that I, the said Friederieck Kehlhoff, my executors,
administrators, and assigns, and every of us, by myself and ourselves, or by
mine and our deputy or deputies, servants or agents, or such others as I, the
said Friederieck Kehlhoff, my exccutors, 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 and herein-after expressed, should
and lawfully might make, use, exercise, and vend my said Invention within
that part of His said Kingdom of Great Britain called England, the Dominion
of Wales, and Town of Berwick-upon-Tweed, and also in His Colonies and
Plantations abroad, in such manner as to me, the said Friederick Kellhoff,
my executors, administrators, and assigns, or any of us, should in our dis-
cretions seem meet; and that I, the said Friedericek Keblhoff, my executors,
administrators, and assigns, should and lawfully might have and enjoy the
whole profit, benefit, commodity, and advantage, from time to time coming,
growing, accruing, and arising, by reason of the said Invention, for and during
the term of years therein and herein mentioned, to have, hold, exercise, and
enjoy the said licence, powers, priviledges, and advantages therein-before
granted or mentioned to be granted unto me, the said Friederick Kehlhoff, my
executors, administrators, and assigns, for and during and unto the full end
term of fourteen years from the date of the said Letters Patent next and
immediately ensuing, and fully be compleat and ended; in which said Letters
Patent is contained a proviso that if I, the said Friederieck Kehlhoft, should
not particularly describe and ascertain the nature of my said Invention, and
in what manner the same is to be performed, by an instrument 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 kalendar months next and
immediately after the date of the said Letters Patent, that then the said
Letters Patent, and all liberties and advantages whatsoever thereby granted,
should utterly cease, determine, and become void, anything therein contained
to the contrary thereof in anywise notwithstanding.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Friederieck Kellhoff, do hereby describe the nature of my said Invention, and
the manner in which the same is to be performed, to be as in the Plan or Draft
hereunto annexed, and the description or explanation thereof herein-after
mentioned (that is to say) :-
First, there is, under the dial plate upon the back arbor, a pinion A, which
takes in the wheel B. Upon this wheel is fixed a snail C, upon which is
placed an ordinary spring D. When the main spring is in the greatest power
the spring D pushes fast upon the snail and diminishes the force of the main

page_text: spring, and as the main spring begins to be weaker the spring D always
pushes less, and, consequently, the force is at all times equal. The fourth
wheel E is in the center, and carries the second hand. Upon the arbor of
this wheel is a pinion of eight F', which goes free on the arbor. On this
pinion is fixed one end of the little spring G, of the strength of a pendulum
spring; the other end is fixed on the arbor of the fourth wheel. In this pinion
F, take the third wheel in and wind up that little spring. This little spring
makes the watch go, because the power of the main spring goes no farther
than to wind up that little spring, and is the great wheel. If the second or
third wheels take in a little too deep or not deep enough, it cannot cause an
unequal pit, because the little spring which makes the watch go is always
wound up, and in an equal force. All the wheels are horizontal.
ballance wheel H is a flat wheel; it has two circles I, I; the distance of
these two circles forms the center of the verge. In these circles are pins, which
form the teeth. The ballance K. has but a streight arbor L, on which is
fixed the pallats M. The working part of it is of a triangular figure, N, and
goes in the middle of the two circles of the ballance wheel H. The pallats
work under the bivet of the ballance and under the bottom of the botance O.
The
In witness whereof, I, the said Friederieck Kehlhoff, have hereunto set
my hand and seal, the Twenty-eighth day of March, in the year of our
Lord One thousand seven hundred and sixty-five.