IMPROVEMENTS ON OR ADDITIONS TO MACHINES FOR MAKING BRICKS, TILES, AND, EARTHEN WARES
Year: 1813

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
HAMILTON, of the City of Dublin, Gentleman, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Twenty-eighth day of
April, in the fifty-third year of His reign, give and grant unto me, the said
Joseph Hamilton, my exors, adŵriors, and assigns, His especial licence, full
power, sole priviledge and authority, that I, the said Joseph Hamilton, my
exors, admors, and assigns, should and lawfully might, during the term of
years therein mentioned, make, use, exercise, and vend, within England,
Wales, and the Town of Berwick-upon-Tweed, my Invention of "IMPROVEMENTS
ON OR ADDITIONS TO MACHINES FOR MAKING BRICKS, TILES, AND, EARTHEN WARES;"
in which said Letters Patent there is contained a proviso that if I, the said
Joseph Hamilton shall not particularly describe and ascertain the nature of my
said Invention, and in what manner the same is to be performed, by an instru-
ment in writing under my hand and seal, and cause the same to be inrolled in
His Majesty's High Court of Chancery within six 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,
shall utterly cease, determine, and become void, 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 proviso, I, the said
Joseph Hamilton, do hereby declare that the nature of the said additions or

page_text: improvements, and the manner in which the same are to be used, are par-
ticularly described in manner following, that is to say:-
First, in order to lessen the inconvenience which attends the withdrawing
of the piston for the purpose of charging the cylinder or DOD (used in the
manufacture of earthenware, bricks, or tiles) with clay or other fit materials,
and also to lessen the quantity of air which usually accompanies the charge
of clay or other fit materials into the said dod or cylinder,
use a screw with
a sufficiently deep thread, in one or more pieces and of a convenient diameter,
by the revolutions of which screw in the cylinder or dod, on the principle
of the blue makers' screw, or the pump screw, I charge the cylinder or dod
at my convenience, and subject the clay or other fit materials to the necessary
pressure with less inconvenience from air than that which attends the use
of a piston.
Secondly, to enable several persons to work at or about one dod or cylinder
used for the said manufacture, I construct stop-cocks or slides in any con-
venient number of tubes or pipes, through which I force the clay or other
fit materials with the said screw from the cylinder or dod to the said several
persons, by which stop-cocks or slides each of the said several persons can
dmit or exclude the said clay or other fit materials at such times as may
suit his or her convenience without stopping the other person or persons who
may be working at or about the same dod or cylinder at the same time.
In witness whereof, I, the said Joseph Hamilton, have hereunto set
my hand and seal, this Twenty-first day of October, in the year of
our Lord One thousand sight hundred and th