A CERTAIN MACHINE OR CONTRIVANCE TO MOULD OR WITHDRAW PATTERNS POR THE CASTING OF WOOD, BED, AND ALL OTHER SCREWS WHICH ARE GOT UP IN CAST IRON, BRASS, OR OTHER METALLIC COMPOSITIONS
Year: 1800

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, Í, RICHARD
MAULLIN,' of 'Coseley, in the County of Stafford, Screw Maker, send greeting."
WHEREAS His most Excellent Majesty King George the Third, by
His Letters Patent under the Great Seal of Great Britain, bearing date
at Westminster, the Twenty-eighth day of February, in the fortieth year
of His reign, did, for Himself, His heirs and successors, give and grant
unto me, the said Richard Maullin, His especial licence that I, the said
Richard Maullin, my executors, administrators, and assigns, and every of
them, by myself and themselves, or by mine and their deputy or depu-
ties, servants or agents, or such others as I, the said Richard Maullin, my
executors, administrators, or assigns, should at any time agree, 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; within
England, Wales, and the Town of Berwick-upon-Tweed, my "Invention of
"A CERTAIN MACHINE OR CONTRIVANCE TO MOULD OR WITHDRAW PATTERNS POR THE
CASTING OF WOOD, BED, AND ALL OTHER SCREWS WHICH ARE GOT UP IN CAST IRON,
BRASS, OR OTHER METALLIC COMPOSITIONS;" in which said Letters Patent there
is contained a proviso obliging me, the said 'Richard' Mäullin, by an
instrument in writing under my hand and seal, particularly to describe and
ascertain the nature of my said Invention, and in what manner the same is
to be performed, and to cause the same to be enrolled in His said Majesty's
High Court of Chancery within one calendar month next and immediately
after the date of the said recited Letters Patent, as in and by the sanie,'
reference being thereunto had, will more fully and at large appear." ".

page_text: KNOW YE, that in compliance with the said proviso, I, the said Richard
Maullin, do hereby declare that the nature of my said Invention, and the
manner in which the same is to be performed, is described and ascertained
in the Drawing of the different parts of the machine in the margin of these
Presents, and the following explanation thereof:-
Firstly, the Figure marked A, in the Drawing No. 1, represents the frame
of wood which supports the machinery, and to the sides of which are affixed
the two bars marked B, B. In the said bars are fixed the spindles of three
wheels, the central wheel of which, marked D, receives its action from the
winch C, and by means of cogs represented in the Drawing gives motion
to the two outer wheels E, E. The spindles of the two outer wheels pass
through the upper bar, and are connected with and impart their own motion
to the two cranks marked F, F.
Secondly, the plate marked G, in the Drawing No. 1, and more clearly
represented by the Drawing No. 2, has one hole at each end, marked in
plate 2, F, F, for the admission of the two cranks F, F, in Drawing No. 1,
and has also a hole at each of the four angles or corners, marked H, H, H, H,
in Drawing No. 2, through which four worm cranks (two of which only are
represented in the Drawing No. 1, marked H, H,) pass, and by which the
said plate is suspended and regulated, the bottom of each crank H, having
a button, on which the said plate loosely rests. The upper parts of these
worm cranks, marked H, H, H, H, passing through holes in plate K, move
in four corresponding female worms or brasses, which are fixed in the inside
of the frame, between the plates K and I, and thereby regulate and sustain
the plate G. On the turning of the winch C the cranks F, F, by their
circular motion, give movement to the plate G, which gives a circular move-
ment to the four worm cranks H, H, H, H, and which worm cranks, operating
as before described, give a perpendicular elevative or depressive motion to the
plate G, at the will of the operator or workman, by moving the winch to
the right or left.
Thirdly, the letters I and K, in Drawing No. 1, represent two corre-
sponding brass plates, with holes therein, for the worm cranks or patterns
herein-after described to pass through. The plate I is also more particularly
shewn by Drawing No. 3.
Fourthly, the letters M, M, M, M; in Drawing No. 1, represent the
smaller worm cranks or patterns, only four of which (the others being con-
structed in the same manner) are represented in the Drawing, but of which
there may be twelve dozen or any determinate number. The top of each
of these cranks consists of the pattern of the screw intended to be cast, which

page_text: may be of any given size, and the foot or bottom may be made either with
an oval hole or an open end to prevent friction, and rests on the plate G,
a pin or button being screwed through the open end into the plate in such
a way as to admit of receiving the circular motion from the plate by means
of the pin, after the manner represented in Figure L of the Drawing No. 4.
Fifthly, when the plate G is fully depressed, in manner before described,
the tops of these smaller worm cranks or patterns are parallel with the surface
of the plate I, and when the plate G is fully elevated in manner before
described the patterns of the screws intended to be cast appear on the top
of the machine, the pattern of the head, except the slit, being formed on a
plate I, as seen in Drawings No. 1 and 3. After the pattern screws are thus
raised above the plate, a bed or frame of sand is then pressed upon the plate
I, and the patterns are withdrawn by the depression of the plate, as before
described, leaving a cavity or impression of the pattern in the bed of sand
for the reception of the metal, which is introduced by gilts or sprays in the
usual way of casting. These screws may be made in cast iron, brass, or any
other metallic composition.
In witness whereof, I, the said Richard Maullin, have hereunto set my
hand and seal, the Twenty-second day of March, in the year of our
Lord One thousand and eight hundred.