AN IMPROVED VARIABLE CIRCULAR MOTION APPLICABLE TO SLOTTING, SHAPING, AND PLANING MACHINES, OR SIMILAR PURPOSES
Year: 1859

page_text: LETTERS PATENT to John Glasgow and Samuel Hand, of the City of
Manchester, in the County of Lancaster, for the Invention of "AN
IMPROVED VARIABLE CIRCULAR MOTION APPLICABLE TO SLOTTING, SHAPING,
AND PLANING MACHINES, OR SIMILAR PURPOSES."
Sealed the 13th October 1859, and dated the 16th April 1859.
PROVISIONAL SPECIFICATION left by the said John Glasgow and
Samuel Hand at the Office of the Commissioners of Patents, with their
Petition, on the 16th April 1859.
We, JOHN GLASGOW and SAMUEL HAND, of the City of Manchester, in the
County of Lancaster, do hereby declare the nature of the said Invention for
"AN IMPROVED VARIABLE CIRCULAR MOTION APPLICABLE TO SLOTTING, SHAPING,
AND PLANING MACHINES, OR SIMILAR PURPOSES," to be as follows:-
We give motion to the main shaft of the machine by gearing or other
suitable means, and place upon one end a boss or plate having fixed to or cast
with it a pin forming a crank, which pin works within the steel surfaced sides

page_text: of another plate or boss fixed upon or cast to another shaft, the centre line of
which is placed out of line or centre with the first-mentioned shaft, so that it
may receive a variable motion, which being transmitted to tools of different
descriptions, enables us to employ a slow and powerful motion during the
process of cutting, and give the return stroke with greater velocity. The
aforesaid shafts are either enclosed in the body of the framework or placed in
open framing as required. It is evident that, if desired, we can reverse the
said motion, and obtain the same results.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Glasgow and Samuel Hand in the Great Seal Patent
Office on the 15th October 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
GLASGOW and SAMUEL HAND, of the City of Manchester, in the County of
Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of April, in the year of our Lord
One thousand eight hundred and fifty-nine, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said John Glasgow and Samuel Hand, Her special licence that
we, the said John Glasgow and Samuel Hand, our executors, adminis-
trators, and assigns, or such others as we, the said John Glasgow and
Samuel Hand, our executors, administrators, and assigns, should at
any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"AN IMPROVED VARIABLE CIRCULAR MOTION APPLICABLE TO SLOTTING, SHAPING,
AND PLANING MACHINES, OR SIMILAR PURPOSES," upon the condition (amongst
others) that we, the said John Glasgow and Samuel Hand, by an instru-
ment in writing under our hands and seals, or under the hand and seal
of one of us, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said Letters
Patent.

page_text: NOW KNOW YE, that we, the said John Glasgow and Samuel Hand, do
hereby declare the nature of our said Invention, and the manner in which
the same is to be performed, to be particularly described and ascertained in and
by the following statement (that is to say):
We give motion to the main shaft of the machine by gearing or other
suitable means, and place upon one end a boss or plate, having fixed to or
cast with it a pin forming a crank, which pin works within the steel surfaced
sides of another plate or boss fixed upon or cast to another shaft, the centre
line of which is placed out of line or centre with the first-mentioned shaft, so
that it may receive a variable motion, which being transmitted to tools of
different descriptions, enables us to employ a slow and powerful motion during
the process of cutting, and give the return stroke with greater velocity. The
aforesaid shafts are either enclosed in the body of the framework, or placed in
open framing as required.
The manner in which our Invention is performed will be clearly understood
by referring to the letters and figures on the accompanying Sheet of Drawings,
in which Fig. 1 is a plan of our improved variable circular motion; Fig. 2,
a side elevation in section of the same; and Figs. 3, 4, 5, 6, 7, 8, and 9, are
views of the several parts detached.
a represents the framework of the machine, with bearings for the main
shaft b, at one end of which is the boss or plate c, having a crank pin d
encircled with the block e, which block works within the metal or steel
surfaced slides of another plate or boss 9 on the shaft h, the centre line of
which is not in line with that of the main shaft as seen at i and k. As the
main shaft revolves, the block on the crank pin moves to and fro in the slides
f, and gives a variable motion to the shaft h, which motion is transmitted to
the cutting tools of the machine.
The various parts are arranged according to the several requirements, but
in many cases it is advantageous to employ a boss l, the interior forming the
bearing for the shaft h, and the exterior fitted to the framework. It is
evident that, if desired, we can reverse the parts of the said motion, and obtain
the same result.
Having thus fully described the nature of our said Invention, and the
manner in which the same is to be performed, we desire it to be distinctly
understood that we do not confine ourselves to the precise details herein set
forth, as such may be varied or modified without departing from the principle
thereof; but we claim as our Invention, and which, to the best of our know-
ledge and belief, has not been hitherto used within the realm, the improved

page_text: variable circular motion as herein described and illustrated in the accom-
panying Sheet of Drawings.
In witness whereof, we, the said John Glasgow and Samuel Hand,
have hereunto set our bands and seals, this Fourteenth day of October,
in the year of our Lord One thousand eight hundred and fifty-nine.
Signed, sealed, and delivered by the
within-named John Glasgow and
Samuel Hand, in the presence of
E. J. HUGHES, Patent Agent,
Manchester.
SAMUEL HAND. (L.S.)