Improvement in Tool-Holders for Grinding Page: 2 of 3
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UNITED STATES PATENT OFFICEo
CHARLES N. FISHER, OF WILLIS, TEXAS, ASSIGNOR OF ONE-HALF HIS
RIGHT TO JOSEPH FRAMPTON, OF SAME PLACE.
IMPROVEMENT IN TOOL-HOLDERS FOR GRINDING.
Specification forming part of Letters Patent No. 176,946, dated May 2, 1876 ; application filed
Janaary 9, 1875.To all whom it may concern:
Be it known that I, CHAIIRLES N. FSHER,
of Willis, in the county of Montgomery and
State of Texas, have invented a new and val-
nable Improvement in Tool-Holders; and I
do hereby declare that the following is a full,
clear, and exact description of the construe-
tion and operation of the same, reference be-
ilig had to the annexed drawings, making a
part of this specifications, and to the letters
and figures of reference marked thereon.
Figure 1 of the drawing is a representation
of a longitudinal vertical section of my tool-
holder. Fig. 2 is a plan view of the same, and
Fig; 3 is a sectional detail view.
This invention has relation to improvements
in holders, which are designed for holding
tools in contact with-the periphery of a grind-
stone; aild the nature of the invention con-
sists in a triangular frame transversely braced
at or near the middle 6f its length, which
brace is provided with a perforation adapted
to receive the end of a metallic hook, upon the
screw- threaded end of which is applied a
clamlping-nut, whereby a means is provided
for holding axes, chisels, and the like when
the same are rigidly clamped by the said hook
against the brace by setting up the thumb-
nut. It also consists in a detachable plate
applied upon the cross- bar, and clamped
against the same by means of thumb-screws,
whereby a means is provided whereby a flat
tool-as, for instance, a plane-bit-may be
rigidly set against the edge of the stone to
produce any desired bevel, when the same is
inserted between the cross and clamping-plate
and the set-screws set up, as will be hereinaf-
ter more fully explained.
In the annexed drawings, A designates a
triangular wooden frame, consisting of two
lateral bars, a, and a handle-bar, b, as shown
in Fig. 1. This frame is provided at the point
of convergence of bars a with a strong me-
tallic corner-piece, B, terminating in a tapering
point, e, for a purpose hereinafter made clear.
At or near the center of the length of the
triangular frame A a strong metallic plate C
is rigidly secured in an inclined position to
the plane of the frame and parallel to the
handle-bar b. This plate has cut through it,at suitable distance to one side of the center
of its length, a perforation, iuto which a book,
h, is designed to be inserted under circum-
stances and for a purpose hereinafter ex-
plained. D indicates a detachable metallic
clamp, preferably of the same dimensions as
plate C, and having a vertical perforation cut
tlirongh it registering with that of the said
plate. Clamp D is removably attached to,
and adjustably applied on frame A, under
plate C, by means of thumb-screws d, both
the plate and the clamp having their bodies
swaged downwardly in an equal incline from
the horizontal plane of the fiaine for the pur-
pose of allowing.a flat tool, such as a plane-
bit, to be held ill all inclined position upon
the 'edge of the stone, as shown in Fig. 1.
This tool or any similar fiat tool is held rig-
idly in place by setting up screws d, thereby
clamping it rigidly up against plate C by their
action upon clamp plate D. The tapering
point c, of corner piece B, is adapted to be
inserted into an upright, shown in Fig. 1, rig-
idly secured in proper position relative to the
grindstone upon its frame, the frame A of the
holder extending over and beyond the stone.
By this means a vertically vibratory notion
may be imparted to the tool for the purpose
of giving it the rounding edge common to
many varieties of tools.
With a view to adapting the holder above
described to be used for holding tools with
enlarged handles, as chisels, and other like
articles, I make use of a strong metallic hook,
A, having its screw-threaded end i passed into
the registering perforations above mentioned
in the clamp-plate D and cross-plate C, as
shown in Fig. 3. j designates a thumb-nut
applied upon the projecting screw-threaded
end i of hook hA, whereby it is rendered capa-
ble of being clamped over the handle of a
chisel for the purpose of holding it rigidly
against vibration. The handle of a chisel or
other like tool is inserted under the hooked
end of clamp h between it and plate C; thuimb-
nat j is then forcibly set up, and the tool se-
cured in position for grinding. Point a of
corner-piece B being inserted into a suitable
perforation in the upright above described,
and the stone having been set in motion, the
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Fisher, Charles N. Improvement in Tool-Holders for Grinding, patent, May 2, 1876; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth166543/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.