A PINION AND RACK FOR THE USE OF. ALL KINDS. OF. PUMPS, WATER AND FIRE ENGINES, AND OTHER ENGINES WHERE EXTRAORDINARY POWER IS REQUIRED, ANDREOF, WHICH WOULD BE OF GREAT: UTILLITY AND SAVING TO
Year: 1776

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MICHAEL
SEARLES, of the Parish of Cripplegate, in the City of London, Surveyor, send
greeting.
1.
WHEREAS I, the said Michael Searles, did, by my Petition, humbly
represent unto His present most Excellent Majesty King George the Third,
that I had, with great labour, study, and application, and after many expen-
sive experiments, found out and invented "A PINION AND RACK FOR THE USE
OF. ALL KINDS. OF. PUMPS, WATER AND FIRE ENGINES, AND OTHER ENGINES WHERE
EXTRAORDINARY POWER IS REQUIRED, AND THAT THE SAID INVENTION IS CONSTRUCTED
ON SO EASY AND SIMPLE A PRINCIPLE THAT THE WORKING OF ALL KINDS OF PUMPS;
WATER AND FIRE ENGINES, AND ALL OTHER ENGINES WHERE EXTRAORDINARY POWER
IS: WANTED, WILL BE ATTENDED WITH MUCH LESS EXPENCE THAN THENTOPORE;
FROM THE NATURE OF THE CONSTRUCTION OF THE SAID NEW-INVENTED PINION AND
BACK, AS THE SAME ARE LESS EXPENSIVE THAN THE APPARATUS NOW MADE USE OF
FOR THE WORKING OF SUCH PUMPS AND ENGINES, AND THAT THE SAID NEW-INVENTED
PINION AND RACK ALSO GAINS POWER, AND SAVES TIME IN THE WORKING THEREOF,
WHICH WOULD BE OF GREAT: UTILLITY AND SAVING TO THE PUBLIC," I did therefore
most humbly pray His said Majesty to grant unto me, my executors, admi-
nistrators, and assigns, His Royal Letters Patent under the Great Seal of
Great Britain, for the sole making,-using, and vénding my said new Invention
within that part of His Majesty's Kingdom of Great Britain called England,

page_text: His Dominion of Wales, and Town of Berwick-upon-Tweed, for the term of
fourteen years, according to the form of the Statute in that case made and
provided; His said Majesty, taking the premises into His Royal consideration,
and being willing to give encouragement to all arts and inventions which
might be for the public good, was most graciously pleased to condescend to
my said request, and therefore His said Majesty, by His Royal Letters Patent,
bearing date at Westminster, the Thirtieth day of January, in the sixteenth
year of His. reign, of His special grace, certain knowledge, and meer motion,
did give and grant unto me, the said Michael Searles, my executors, admors,
and assigns, His special licence, full power, sole priviledge and authority,
that I, the said Michael Searles, 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 Michael Searles,
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 expressed, should and lawfully might make, use, exercise, and
vend my said Invention within that part of His said Majesty's Kingdom of
Great Britain called England, His Dominion of Wales, and Town of Berwick-
upon-Tweed, in such manner as to me, the said Michael Searles, my
executors, administrators, and assigns, or any of us, should in our discretion
seem meet; and that I, the said Michael Searles, 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,
accrewing, and arising by reason of the said Invention, for and during the
term of years therein mentioned, to have, hold, exercise, and enjoy the
said licence, powers, priviledge, and advantages therein-before granted or
mentioned to be granted unto me, the said Michael Searles, my executors,
administrators, and assigns, for and during and unto the full end and term of
fourteen years from the date of the said Letters Patent next and immediately
ensuing, and fully to be compleat and ended, according to the Statute in
that case made and provided; in which said Letters Patent is contained a
proviso that if I, the said Michael Searles, 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 Majesty's High Court of Chancery
within four calendar 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

page_text: become void, anything therein-before contained to the contrary thereof in
anywise notwithstanding, as in and by the said recited Letters Patent,
relation being thereunto had, will more fully and at large appear.
NOW KNOW YE, that I, the said Michael Searles, in compliance with
the said proviso, do hereby describe and ascertain the nature of my said
Invention, and the manner in which the same is to be performed, in manner
and form following, that is to say:-
To make the new-invented Pinion.-Make a pinion, coghe it part round, so,
as to make little more or less than an angle of one hundred and twenty degrees
from the center of each of the outward teeth. The body of the pinion, where
it is not cogged, must be reduced much below the line of the bottom part of
the teeth.
To make the new-invented Rack.--The rack consists of one piece of any
sort of metal, having teeth or cogging on each side, and must be made to
answer the pinion. The top and bottom of the rack, on the inside, must
project much farther than the rest of the teeth, to lay the fuller hold on the body
of the pinion.
The following, together with the above, shews the nature of the said
Invention, and in what manner the same is to be performed:-The pinion is
fixed on an arbor or spindle, and works inside the rack first on one side, with
which it carrys the rack up; it then leaves that side of the rack, and lays
hold on the projecting part of the rack, and brings it down in a continued
motion. The rack is kept in its possition by the help of friction wheels, made
with a grove, in the nature of pullies. The pump rod is fixed at the bottom
of the rack, and works up and down with the rack. It may be worked simply
by a wynch, or with other wheels.
In witness whereof, I, the said Michael Searles, have hereunto set my
hand and seal, the Fourteenth day of May, in the sixteenth year of
the reign of His Majesty King George the Third, and in the year of
our Lord One thousand seven hundred and seventy-six.

page_text: AND BE IT REMEMBRED, that the said Fourteenth day of May, in the
sixteenth year of the reign of His Majesty King George the Third, the
aforesaid Michael Searles came before our said. Lord the King in His Chan-
cery, and acknowledged the Instrument aforesaid, and all and every thing
therein: contained and.. spécified, in form above written. And also the
Instrument aforesaid was stampt according to the tenor of the Statute mado
in the sixth year of the reign of the late King and Queen William and Mary
of England,. and so forth..
Inrolled the said Fourteenth day of May, in the year above written.