Improvements in Stone Dressing Tools.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 29th day of October 1897.
Date of Application, 30th July, 1896
5th Luna 1907
PROVISIONAL SPECIFICATION.
Improvements in Stone Dressing Tools.
I, GEORGE CLARK of Penistone Road, in the City of Sheffield, Manufacturer,*
do hereby declare the nature of my invention to be as follows:-
My invention relates to improvements in hand tools or chisels for working in
stone, marble and the like, having detachable points or cutters, and refers more
particularly to the means by which such points may be held securely in the handle
portion of the tool.
I propose to use double tapered points or cutters having either a central ridge,
or a central portion left flat as may be preferred, and the edges either plain or
serrated.
The handle is prepared at one end with a slot to receive the point or cutter, and
whether the ridges on the cutter are in the centre or not, the slot is made so that
the extreme ends of the two sides of the slotted handle extend beyond such ridge,
and are there contracted so as to clasp upon the narrower tapering end of the point
or cutter which projects from the handle, and this is the chief part of my
invention.
The inner end or bottom of the slot may be extended beyond the reach of the
edge of the point or cutter, and such end may be constructed to hold and be filled
with lead or other soft metal to protect the edge of the cutter.
Dated the 20th day of July 1896.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
Improvements in Stone Dressing Tools.
I, GEORGE CLARK, of Penistone Road, in the City of Sheffield, Manufacturer,
do hereby declare the nature of this invention and in what manner the same has
to be performed, to be particularly described and ascertained in and by the
following statement:-
My invention relates to improvements in hand tools or chisels for working in
stone, marble and the like, having detachable points or cutters, and refers more
particularly to the means by which such points or cutters may be secured in the
handle ortion of the tool.

page_text: The annexed sheet of drawings clearly illustrates the way in which I carry out
my invention:
Fig. 1, is an elevation of a chisel with removable cutter.
Fig. 2, edge view of same.
Fig. 2, the same without cutter.
Fig. 3, two views of a detached cutter with ridge.
Fig. 4, two views of a cutter with a centre flat."
Similar letters of reference indicate similar parts in any of the figures.
The cutters I propose to use are made of thin steel, see Figs. 3 & 4 having either
a central edge Ds and each side tapering to the cutting edges, or they may have a
narrow flat across the centre and taper from the edges of the flat 13, to the cutting
edges, which may be plain or serrated as preferred, but I lay no claim to the
formation of the cutters.
The handle A, is prepared at the lower end B, with a traverse slot C, to receive
and hold the removable cutters D, to which the slot corresponds in form,
being so constructed that the extreme ends of the part B. extend beyond the ridge D
(or flat D3 as the case may be) of the centre, and are there contracted or closed
so that they grip the tapering part of the cutter beyond the ridge (or flat) as shown
in Fig. 2, and thus prevent its escape.
The cutters are driven into the handle from either side.
The upper end of the slot C may extend beyond the edge of the cutter and may
be enlarged or otherwise formed as indicated by a dotted circle E in Fig. 2^, to
hold an abutment of lead or other soft material to protect the edge of the cutter
from damage.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I wish it to be under-
stood that I am aware of the Specification of Faulds' Patent No. 814 of 1892 and
that I do not claim anything described and claimed therein, but I declare that
what I claim, is:-
A stonemasons dressing tool for holding removable cutters, having a cutter
slot C. contracted at the mouth for the purpose specified, as hereinbefore described
and shown.
Dated the 29th day of April 1897
ROBT. F. DRURY,
Bank Buildings, George Street, Sheffield, Agent for Applicant.