AN IMPROVED TOOL FOR CUTTING GLASS AND OTHER SUBSTANCES
Year: 1871

page_text: LETTERS PATENT to Joseph Robinson Mottram, of Liverpool, in tlie
County of Lancaster, for the Invention of "AN IMPROVED TOOL FOR
CUTTING GLASS AND OTHER SUBSTANCES."-A communication from abroad
by William Clive, residing in Decorah, Winnesheik County, Iowa,
in the United States of America.
COMPLETE SPECIFICATION filed by the said Joseph Robinson Mottram
at the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 2nd February 1871, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
.
TO ALL TO WHOM THESE PRESENTS SHALL COME, be it known
that I, JOSEPH ROBINSON MOTTRAM, of Liverpool, in the County of
Lancaster, do hereby declare the following written statement (reference
being had to the annexed Drawings and the letters and figures
marked thereon) to be a full and complete description of an Invention
for "AN IMPROVED TOOL FOR CUTTING GLASS AND OTHER SUBSTANCES," as com-

page_text: municated to me from abroad by William Clive, a resident in Decorah,
Winnesheik County, Iowa, in the United States of America (that is to
say) :—
This Invention has for its object a novel, neat, and effectual tool for
cutting glass and other slabs of like hard material for which now
diamonds are commonly used, and consists in using a small wheel of
steel or other hard substance which is free to revolve on its axis as the
cutting medium in place of the diamond.
A tool constructed according to this Invention may consist of a handle
and swivelling foot piece resembling those of the ordinary glazier's
diamond, but in place of having a diamond set in the lower edge of the
foot piece the lower corner of said foot piece is slotted so as to form
bearings for the transverse axle of a small wheel made from steel or
other suitable hard substance, arranged as shewn in the annexed
Drawings, of which Figure 1 is a side elevation of the improved tools
drawn full size for a convenient instrument for cutting window glass,
and other purposes; Figure 2 is an enlarged plan of the under side
of the foot piece and cutting wheel; Figure 3 is a partial side elevation
of Figure 1, also shewn enlarged that the mode of constructing the
instrument may be the more readily seen.
A is the handle to which is attached B the swivelling foot piece,
in which is mounted C a small wheel the periphery of which is bevilled
off on each side from the centre and revolves freely on D a transverse
axle.
The tool is used in the same way as the ordinary glazier's diamond.
•
Having now fully described and ascertained the nature of the said
Invention, and the best means I am acquainted with for carrying the
same into practical effect, I wish it to be understood that I do not confine
myself to the precise detail proportions or dimensions of the several
parts, nor to the precise bevils on the periphery of the cutting wheel C
herein-before described and set forth, as it will be obvious to all
acquainted with the art that the same may be considerably varied
without departing from the Invention; but what I claim is,-
First. The cutting wheel C constructed and mounted substantially
in the manner and for the purposes herein-before described and set
forth.

page_text: And, lastly. The combination of the cutter wheel with the foot piece
and handle, substantially in the manner and for the purposes herein-
before described and set forth.
In witness whereof, I, the said Joseph Robinson Mottram, have
hereunto set my hand and affixed my seal, this First day of
February, in the year of our Lord One thousand eight hundred
and seventy-one.
JOSEPH ROBINSON (L.s.) MOTTRAM.
Witness, .
WILLIAM WALKER,
Of 44, Castle Street,
Liverpool.