A MACHINE TO PICK AND DRESS STONES OF VARIOUS DESCRIP- TIONS, PARTICULARLY GRANITE STONE
Year: 1824

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
DALLAS, of Northumberland Court, Southampton Buildings, in the Parish
of Saint Andrew, Holbourn, in the County of Middlesex, Engineer, send
greeting.
WHEREAS His present most Excellent Majesty King George the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date
at Westminster, the Twenty-seventh day of April, in the fifth year of His
reign, did, for Himself, His heirs and successors, give and grant unto me, the
said Alexander Dallas, my exors, adññors, and assigns, His especial licence
that I, the said Alexander Dallas, my exors, admors, and assigns, or such
others as I, the said Alexander Dallas, my exors, adñors, and assigns, should
at any time agree with, and no others, from time to time and at all times
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, and also in all His Majesty's Colonies and Plantations abroad,
my Invention of "A MACHINE TO PICK AND DRESS STONES OF VARIOUS DESCRIP-
TIONS, PARTICULARLY GRANITE STONE;" in which said Letters Patent there is
contained a proviso obliging me, the said Alexander Dallas, by an instru-
ment in writing under my hand & seal, particularly to describe and ascer-
tain the nature of my said Invention, and in what manner the same is

page_text: to be performed, and to cause the same to be inrolled in His Majesty's
High Court of Chancery with six calendar months next and immediately
after the date of the said in part recited Letters Patent, as in and by the
same, relation being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Alexander Dallas, do hereby declare that the nature of my said Invention,
and the manner in which I perform the same, are particularly described and
ascertained in and by the following description thereof, reference-being had to
the Drawing hereunto annexed (that is to say) :-
:-
The power applicable is human, animal, wind, steam or otherwise, in pro-
portion to the larger or smaller body of stone required to be worked. The
machine may be constructed as follows (viz*): two uprights as a, a, either of
wood or of iron of various sizes are placed in the ground or in a frame, so as
to receive in its centre, as at B, a lever of wood or iron of different sizes and
lengths between, as at C, C, the lever to work in a fulciment or prop near its
centre, as a B, also two similar uprights introduced at about three feet distance
from the fulciment or prop nearer the large wheel, as at E, in order to
guide or steady the lever, which is worked by the wheel from nine to fifteen
feet, more or less, as may be required, this having three or more cogs to act
alternately on the end of the lever nearest the large wheel, as at F, that it
'may lift it up or let it fall from one to three feet perpendicularly on the stone
at the opposite end, on which is placed a block, as at G, for the purpose of
fixing picks, chissels, or other tools or instruments that may be necessary for
preparing or finishing the stone; this block is so constructed as to be shifted
'at pleasure, as the work and dressing may require, or as. the tools may want
repairing. The lever may likewise be removed, and a fresh one substituted, to
'hole or groove in a straight line, so as to be split with wedges any size stone.
'Under the block G, at the end of the lever, is placed a truck, as at H, for the
purpose of receiving the stone; and under this truck is paced a moveable
frame on a centre, as at I, to enable the workman to shift about his work
'and to finish it off, as becomes necessary; through the centre of the large
.wheel is an axis on which the power is placed to work it, as at K, and which
acts alternately at the nearer end of the lever, in order to lift it up or let
it fall at pleasure.
:
In witness whereof, I, the said Alexander Dallas, have hereunto set my
hand and seal, this Twenty-seventh day of October, in the year of our
Lord One thousand eight hundred and twenty-four.
ALEXANDER (L.S.) DALLAS.

page_text: AND BE IT REMEMBERED, that on the Twenty-seventh day of October,
in the year of our Lord 1824, the aforesaid Alexander Dallas 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 stamped according to
the tenor of the Statute made for that purpose.
Inrolled the Twenty-seventh day of October, in the year of our Lord
One thousand eight hundred and twenty-four.