CERTAIN IMPROVEMENTS IN THE MACHINE OR INSTRUMENT CALLED OR KNOWN BY THE NAME OF A JACK FOR BOASTING MEAT
Year: 1807

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
SHORTER, of the Parish of Saint Giles, Cripplegate, in the City of London,
Mechanic, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
5 His Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Nineteenth day of
October, in the forty-seventh year of His reign, give and grant unto me, the
said Edward Shorter, my exors, admors, and assigns, His especial licence, full
power, sole privilege and authority, that I, the said Edward Shorter, my
exors, admors, and assigns, during the term of years therein mentioned, 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 THE MACHINE OR INSTRUMENT CALLED OR KNOWN BY THE NAME OF A JACK
FOR BOASTING MEAT;" in which said Letters Patent there is contained a
proviso, obliging me, the said Edward Shorter, by an instrument in writing
under my hand and seal, to cause a particular description of the nature of my
said Invention, and in what manner the same is to be performed, to be
inrolled in His Majesty's High Court of Chancery within one calendar month
after the date of the said recited Letters Patent, as in and by the same,
relation being thereunto had, may more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Edward Shorter, do hereby declare that the nature of my said Invention, and
the manner in which the same is to be performed, are particularly described
and ascertained as follows, that is to say :-
First, in the jack as commonly made with all the arbors thereof horizontal,
except that which carries the worn and fly; I do substitute instead of the pullies
and weights a spring in a barrel, and do cause the same to act upon and give
motion to the train by means of a fusce connected with the said barrel by a
gut or rope, or chain, or flexible strip of metal, or other fit and well-known
material of the like description; and I do make the said train, as to the 1
wheels, and pinions, and the threads of the worin (if need), of such numbers
and relative magnitudes as may be best suited to the work intended to be per-
formed by the said jack, of and concerning which no competent workman will
have occasion for further instructions than are hereby given.
Secondly, instead of connecting the fly arbor with the train by means of a 1
worm, I do fix a small wheel upon the said arbor, and do drive the same by
another wheel applied thereto, not by the intervention or mutual action of
teeth, but by the mero opposition of one surface against another, in which case
the friction or stickage at the faces of contact is sufficient to answer the
purpose of such teeth in a very smooth and silent manner; and in order the
more effectually to produce the intended purpose I do, in some cases, face the
said wheels with buff leather, or with short hair standing out in the manner
of a stiff brush, or with woollen cloth or "the like materials; and I do 'make"
the said wheels to act upon cach other by their respective edges or cylindrical
faces or otherwise, in the manner of bevel gear, by slope or conical faces, or
otherwise, in the manner of contrate wheels, by the opposition of the 'upper
edges or plane surfaces or bases of the cylindrical rims, or of a plane surface of
one wheel against the cylindrical surface or outer face of the other; and
further, in order that the said faces may, if required, bear more firmly against
cach, I do in such case set the pivots of the arbor of one of the said' wheels in
a frame moveable cither by a joint or slide, so as to admit of a side motion at
right angles to the arbor, and I press the said frame by a weight or spring
in the required direction with a duc degree of force; or otherwise, when an
action in the direction of the arbor itself is by the construction required, I do, in
the case aforesaid, instead of the said moveable" frame, apply an end plate
against one of the pivots, for the purpose of giving the pressure of a weight or
spring in the direction required.
..:
And, lastly, I do declare that my said Invention may be used and applied

page_text: to the machine or instrument called a jack, either severally or two or more of
them together, according to the choice, judgment, or intention of the manu-
facturer or consumer of the machines or instruments so to be improved accord-
ing to my said Invention.
In witness whereof, I; the said Edward Shorter, have hereunto set my
hand and seal, this Twenty-third day of October, in the year of our
Lord One thousand eight hundred and seven.
AND BE IT REMEMBERED, that on the Twenty-third day of October,
0 in the year of our Lord 1807, the aforesaid Edward Shorter came before our
said Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stampt according to
the tenor of the Statute made for that purpose.
20
5
Inrolled the Twenty-third day of October, in the year of our Lord One
thousand eight hundred and seven.