A ROASTING JACK, WITH PULLEYS AND OTHER APPURTENANCES, ON A NEW CONSTRUCTION, WHICH I CALL A TOURNE-BROCHE;
Year: 1785

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MARTIN, of the Town of Southampton, Wine Merchant, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent, under the Great Seal of Great Britain, bearing date the
Eighteenth day of February, in the twenty-fifth year of His reign, give and
grant unto me, the said John Martin, His especial licence, that I, the said
John Martin, during the term of years therein expressed, should and lawfully
might use, exercise, and vend, within England, Wales, and Town of Berwick-
upon-Tweed, my Invention of "A ROASTING JACK, WITH PULLEYS AND OTHER
APPURTENANCES, ON A NEW CONSTRUCTION, WHICH I CALL A TOURNE-BROCHE;" in
which said Letters Patent there is contained a proviso obliging me, the said
John Martin, under my hand and seal, to cause a particular description of
the nature of my said Invention, and how the same is to be performed,
to be inrolled in His Majesty's High Court of Chancery within four
calendar months 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.
NOW KNOW YE, that in compliance with the said provisoe, I, the said

page_text: John Martin, do hereby declare that my said Invention of a Roasting Jack,
with Pulleys and other Appurtenances, on a new Construction, which
I call a Tourne-Broche, is described in the manner following (that is to
say):-
The tourne-broche consists of a stock or frame which carries a large main
wheel, with a stroke wheel on its arbor, between the main wheel and a baril
or wind-up piece, which main wheel has teeth on the rim, both vertical and
contrate, or vertical only. When vertical and contrate, the contrate teeth give
motion to a side wheel, on the arbor of which is another stroke wheel, and the
vertical teeth move a center wheel made either with or without teeth, in the
center of which is a pinion which turns on a stud fixed to a plate hung at one
end by a pin or stud, and gives motion to a vertical balance or fly over the
center wheel, to which it is kept up by a spring on the plate. When the
main wheel is made with vertical teeth only, the side wheel is left out. The
balance is hung either on a stud or in a frame on centers or points. On the
back of the baril or wind-up piece, and between that and the stroke wheel, is a
spring hung on a pin, which spring is thrown forward by a cock spur while
the jack is winding up, so as to catch hold of the balance and keep it, and
consequently the stroke wheels, in motion. To the front of the frame is
fastned a boss piece, in which the arbor of the baril runs, and to which is fixed a
spring or springs, and a crank, by moving which crank to the right or left the
spring or springs are pushed forward, which either regulates the motion of the
jack or stops it. Over the arbors and studs are caps or collars, to guard them
from dust or filth. The pulley consists of frames, in which are two or more
shieves or pullies turning on pins. The improvement consists in fixing bars
or guards on the frames so near the edges of the shieves or pullies as
to prevent the line from being by any accident thrown out of the grooves in
the shieves or pullies, or, as is commonly expressed, from being put out of
pulley.
:
In witness whereof, I, the said John Martin, have hereunto set
my hand and seal, this Tenth day of June, One thousand seven hundred

page_text: AND BE IT REMEMBERED, that on the Tenth day of June, in the
year of our Lord 1785, the aforesaid John Martin 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 Statutes made for that purpose.
Inrolled the Sixteenth day of June, in the year of our Lord One thousand
seven hundred and eighty-five.