Improvements in Hand Implements for "Tooling" Stone Surfaces.
Year: 1892

page_text: Date of Application, 25th July, 1892-Accepted, 27th Aug., 1892
Improvements in Hand Implements for "Tooling" Stone Surfaces.
I, WILLIAM FREDRICK NICHOLSON, of 71 Shrewsbury Street, Worcester, in
the County of Worcester, and State of Massachusetts, United States of America,
Stone-cutter, do hereby declare the nature of my invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement reference being had to the accompanying sheet of
drawings and to the letters and figures marked thereon, that is to say:-
Figure represents a block of stone in plan view with a gage-plate and my
improved tooling implement applied thereto in position for operating upon the
surface thereof, a portion of said surface being shown already "tooled
hereinafter described.
as will be
Figure 2 is a side view of said tooling implement, shown upon an enlarged
scale.
Figure 3 is a plan thereof.
Fig. 4 is a transverse section through the blades of the implement, taken on
lines a a, Figs. 2 and 3, looking in the direction indicated by the arrows in said
figures; and
Figs. 5 and 6 are similar views to Fig. 4 upon a smaller scale, showing modifications
which will be hereinafter described.
The object of my invention is to provide an implement or device whereby what
is commonly known in the stone-cutting trade as "tooling" may be done by hand
in a more expeditious and perfect manner than heretofore; and it consists of a
series of metal toothed plates or blades arranged side by side and adjustably fastened
in a suitable operating handle, the teeth of the blades being curved transversely to
produce similarly-shaped cutting edges, and arranged in a series of transverse lines
across the bottom of the device, so as to cut longitudinal grooves in the stone when
said device is drawn and pushed backward and forward with a downward pressure
over the surface thereof, as will be hereinafter more fully set forth.
•
To enable others skilled in the art to which my invention appertains to better
understand the nature and purpose thereof, I will now proceed to describe it more
in detail.
In the drawings,
The parts marked A represent the series of toothed blades before alluded to,
and B the handle, to which they are secured.
Said blades, of which there are six shown in this instance, are placed side by side
and are fastened to the handle by means of bolts C C and nuts C' C¹, said bolts
being passed transversely through suitable openings in the flanges Bi B₁ of the
handle, between which the blades are arranged, and through vertical slots D D,
extending transversely through all the blades, while the nuts are turned up against
one side, as shown in the drawings.
The outer ends of the blades are similarly fastened by a bolt E and nut E', a
slot D being formed in the blades to receive said bolt.
The purpose of the slots D D' is to admit of the vertical adjustment of the different
blades to suit the work upon which they are to be applied-as, for instance, if a
concave surface is to be "tooled," the blades would be adjusted to produce a convex
curve transversely across the bottom of the implement, as is shown in Fig. 5, while
for a convex surface the blades would be reversed or arranged in concave form on
the bottom, as is shown in Fig. 6. Each blade A is notched transversely on its
bottom edge in the form of saw teeth, as is shown at 6 in Fig. 2, and the teeth of
each blade are arranged in line transversely across the whole width of the bottoin

page_text: of the implement or device, thus forming a series of transverse cutting edges
throughout the length of said bottom face.
In addition to cutting the teeth 6 transversely on the bottom edge of each blade
as aforesaid, the edge of each tooth is curved in a transverse direction to the blades,
so that when the blades are fastened together in the handle the lines of transverse
cutting edges are in the form of a series of convex curves or rib-shaped in outline,
as is shown at c in Figs. 4, 5, and 6.
C
Said cutters being thus formed, it is obvious that by drawing and pushing the
implement or device backward and forward with a downward pressure over the
surface of the stone to be operated upon, a series of grooves d will be gradually cut
therein, corresponding in number and shape to the blades and the cutting edges
thereof.
It will, of course, be understood that I do not limit myself to the special shape
of said cutting-edges or to the number, thickness, and shape of the blades upon
which they are formed, different shapes and sizes being required for different
work.
In practice it is preferable to use a gage-plate Fat one side of the tooling
implement, as is shown in Fig. 1, to guide the same in a straight line, said gage-
plate being fastened to the block of stone by means of set-screws e, or otherwise
held, as desired.
It will at once be apparent to those skilled in the art of stone-cutting that by the
use of my improved hand implement, "tooling" may be done not only very
expeditiously, but also in a perfect manner, each groove being of uniform size,
shape and smoothness.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :
A hand implement for "tooling" stone surfaces, comprising the series of blades A,
placed side by side, and having curved teeth or cutting-edges on the bottom coming
in line transversely, as described, and also having vertical slots extending trans-
versely through all the blades, in combination with a suitable handle B, adapted
to receive one end of the blades when bunched together, and suitable bolts and
nuts for fastening the parts after adjustment, substantially as shown and specified.
Dated this Fourteenth day of July 1892.
WILLIAM FREDRICK NICHOLSON.
W. H. Beck,
115, Cannon Street, London, E.C., Consulting Engineer and Patent Agent.