An Improved Cutter and Cutter Holder.
Year: 1892

page_text: Date of Application, 23rd Feb., 1892-Accepted, 14th May,
1892
COMPLETE SPECIFICATION.
An Improved Cutter and Cutter Holder.
I, ERNEST WILLIAM COOKE, Gentleman, of 1872 North Halstead Street in the
City of Chicago, County of Cooke, State of Illinois and United States of
America, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
My invention relates to cutter and cutter holders, and my object is to provide
such a cutter that it may from its general configuration and shape retain its
position in said holder firmly against displacement while in use or while being
sharpened, and a holder adapted for securely retaining said cutter.
In the accompanying drawings,
Figure 1 is a perspective view of my improved cutter.
Figure 2, is a side elevation thereof.
Figure 3, is a sectional view showing the cutter in position in the holder.
Figure 4, is an underside view of the holder.
Figure 5, is a section on line a-x of Figure 3.
Figure 6, is a view showing the head of the holder without the cutting tool in
place.
The numeral 1 indicates the head or cutting portion of the tool, the sides 2, of
which cutting portion 1, are of greater width than the neck of the tool 3, and
project beyond the side of the neck 3, as shown, and the front portion of said
cutting head has a vertical rearward inclination as at 9.
Below the cutting portion the metal is extended downwardly and is then given
a rearward inclination, which may be either rounded or straight. Extending
rearwardly from the neck portion is a shank 4, which may either be cylindrical or
of other suitable shape.
A space 5, is left between the rear portion of the head and the front portion 6,
of the neck, said portion 6, of the neck being made to incline so as to be flush with
the incline of the front portion of my holder when secured in position.
The upper portion of the neck at 7, is flattened so as to obtain a firm seat in
the holder.
This tool is secured in the holder by the rearwardly inclined portion 8, of the
neck resting against a correspondingly inclined portion of the holder and said
flattened portion 7, bears against the upper inside portion of the holder.
A screw
is passed through the holder so as to bear upon the shank 4, thereby securing the
tool more firmly in its position.
It will be seen from the manner in which the tool projects from the cutter
holder that said tool may be used for a great variety of work, and that it may be
sharpened while in the holder.
In order to retain the cutter securely in position while at work in a machine and
while it is being sharpened I have devised a holder particularly adapted to said
tool, which I will now proceed to describe.
As shown my holder is rectangular in general outline with the front end
bevelled as at 11, to conform with the outline of the front portion 6, of the neck
of the cutter when the latter is secured in the holder. A recess 12, to receive
the tool is formed in the forward portion of the holder, said recess extending
longitudinally a distance corresponding with the length of the cutting tool. The
walls of this recess are especially adapted as already stated, to receive the cutting
tool. The upper wall 13, is downwardly inclined. The lower wall 14, has an
upward inclination either curved or straight to conform to the under side of the
neck of the cutter; and the lower wall has an extension 15, at an obtuse angle
LP 17

page_text: thereto downwardly. The numeral 16, indicates a screw bearing in the shank o
the cutter to aid in retaining it in position.
I preferably cut a slit 17, through the holder from the under side, said sli
extending the entire length of the tool-recess 12. A. screw 18, is passed through
one side of the holder, and extends into a threaded recess in the other side of the
holder. While this slit is not absolutely necessary and I construct holders without
it, it will be seen that by its use a better hold is obtained on the tool, and that any
irregularities in the tool shank may be compensated for.
When the tool is placed in position it will be absolutely secure in said holder, as
the resistance of the work will tend to hold it in place by forcing the shank thereof
against the wall of the recess.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what J
claim is:
1. A cutting tool having a head of greater width than its neck, and provided
with a space between the rear portion of the head and the front portion of the
neck.
2. A cutting tool having the front and back portion of its head rearwardly
inclined and provided with a space between the head and front portion of the
neck.
3. A. cutting tool having a rearwardly inclined head provided with a curved
space between the rear portion thereof and the front portion of the neck, said neck
having at its underside an upward inclination terminating in a shank.
4. A cutting tool having a rearwardly inclined head, a neck having a flattened
upper portion and an under portion with an upward inclination terminating in a
shank, and a curved space between the rear portion of the head and the front
portion of the neck.
5. A tool holder having a recess in one end to receive the tool, a slit extending
through one wall of said recess and means for causing said divided walls to bind
against the tool.
6. A tool holder having a tool receiving recess with a downwardly inclined wall
and an upwardly inclined wall for the neck and shank of the tool and means to bear
against said shank to aid in wedging it in position.
7. A tool holder having a tool receiving recess in its end provided with a down-
wardly inclined wall, an upwardly inclined wall and an obtuse angled extension of
the latter, in combination with a tool adapted to be seated in said recess and means
for binding the tool therein.
8. A tool holder having a tool receiving recess provided with a downwardly
inclined wall, an upwardly inclined wall an obtuse angled extension of the latter,
and a slit in said recess in combination with a tool having a neck and shank corre-
sponding in shape with said recess, and means for locking the tool in position.
9. A tool holder having an angular recess to receive the neck and shank of a
tool, a slit extending through one wall of said recess, means for drawing the sides of
the holder together against a tool, and a screw to bear against the shank of the
tool.
10. A tool holder having an angular recess to receive the neck and shank of a
tool, in combination with a tool adapted to fit in said recess, means for drawing the
sides of the holder against the tool, and means for pressing against the upper side
of the tool to bind it in position.
11. A cutting tool having a rearwardly inclined head provided with lateral
extensions and a curved space between the rear portion thereof and the front
portion of the neck, said neck having at its underside an upward inclination
terminating in a shank.
12. A tool holder having a recess in one end, said recess being an upwardly and
a downwardly inclined wall to receive the tool, a slit extending through one wall
of said recess, and means for causing said divided walls to bind against the tool.

page_text: 13. A tool holder having a tool receiving recess with a downwardly inclined wall
and a separate upwardly inclined wall for the neck and shank of the tool, and
means to bear against said shank to aid in wedging it in position.
14. A tool holder having a double inclined angular recess to receive the neck
and shank of a tool, a slit extending through one wall of said recess, means for
drawing the sides of the holder together against a tool and a screw to bear against
the shank of the tool.
15. A. tool holder having an angular recess to receive the neck and shank of a
tool, in combination with a tool having a long shank with a flattened portion on
its upper side adapted to fit in said recess, ineans for drawing the sides of the
holder against the tool, and means for pressing against the upper side of the tool
to bind it in position.
Dated this 23rd day of February 1892.
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Agent for Applicant.