Improvements in Cutting Tools and Holders for same for use in Lathes, Planing, or Shaping Machines.
Year: 1891

page_text: Date of Application, 13th May, 1891
Complete Specification Left, 12th Feb., 1892-Accepted, 7th May, 1892
PROVISIONAL SPECIFICATION.
Improvements in Cutting Tools and Holders for same for use in
Lathes, Planing, or Shaping Machines.
GEORGE ERNEST SHERWIN Central Works, Alma Street, Aston, Birmingham,
in the County of Warwick, Engineer do hereby declare the nature of this invention
to be as follows:-
The cutter consists of a piece of steel formed to an oblong or similar section at
either end, the central part being round for purpose of holding in the tool-holders
described below.
The tool-holders are made in two forms. One form consists of a shank bored
at one end to receive cutter, this being held securely in position by a setscrew; at
opposite end of the shank a screw is provided by which back of shank may be
raised or lowered, thus adjusting edge of cutter to surface upon which it operates.
The other form of tool-holder consists of a shank, in the front end of which a
stud is fitted, the end of this stud passing through the shank is screwed, and stud
may be raised or lowered by nuts fitting on this screwed part, the head of stud is
provided with a hole into which cutter fits, and is held securely therein by set-
Screw. This form of holder permits of cutter being used at either side or in front
of same.
Dated this 12th day of May 1891.
COMPLETE SPECIFICATION.
Improvements in Cutting Tools and Holders for same for use in
Lathes, Planing, or Shaping Machines.
GEORGE ERNEST SHERWIN, Central Works, Alma Street, Aston, Birmingham
in the County of Warwick, Engineer 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 :-
The cutter consists of a piece of steel formed to an oblong or similar section at
either end, the central part being round for purpose of holding in the toolholders
described below.
The toolholders are made in two forms. One form consists of a shank bored at
one end to receive cutter, this being held securely in position by a set screw, at
opposite end a screw is provided by which back of shank may be raised or lowered,
thus adjusting edge of cutter to surface upon which it operates. The other form
of toolholder consists of a shank in the front end of which a stud is fitted, the
end of this stud passing through the shank is screwed, and stud may be raised or
lowered by nuts fitting on this screwed part; the head of stud is provided with a
hole into which cutter fits, and is held securely therein by set screw. This form
of holder permits of cutter being used at either side or in front of same.
Such being the nature of my invention I will now proceed to more fully describe
same in detail, with the aid of the one sheet of drawings attached hereto.
Fig. 1 represents one form of toolholder. One end of the shank A is bored and
screwed, the stud B being screwed to fit therein, both ends of hole in shank are
recessed to receive coned nuts C, these nuts are cut through in one place in such
manner that when tightened by a spanner into recess of shank, the nuts firmly
grasp the stud B on which these nuts fit, and prevent this stud from turning round
when the tool is at work; for light work the cones on nuts may be dispensed with

page_text: and ordinary lock-nuts used. In the head of stud B a hole is formed for reception
of cutter which is held in position by a set screw D.
Fig. 2 shows another form in which cones may be constructed; in this the cones
are formed on shank A. and the muts Crecessed to fit over cones, these cones being
split that they may be more firmly tightened on stud B.
Fig. 3 shows another variation; in this a coned sleeve D fits into recessed hole
in shank A, the stud B fits into sleeve D which is screwed to receive it, and nut C
fitting on end of sleeve which is split, tightens same on to the stud B and holds
in position. The stud B may be raised or lowered in shank to suit the height of
centre of lathe; the cutter may be used on either side or in front of toolholder,
and cutter may be swivelled in stud to give clearance to the cut.
Fig. shows an enlarged view of the cutter; the centre part of this cutter is
round and this part fits into a suitable toolholder, both ends of cutter are formed
into an oblong section as shown in Fig. 5, this section may, however, be square,
triangular, or other shape suitable to the required purpose; and this cutter may
be used in holders of different forms or shapes as may be found the most suitable
and convenient.
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 :-
1. A toolholder comprising a shank and stud, the latter fitting in the former in
such manner that the stud containing cutter may be raised or lowered, and may be
turned round, that cutter may be used on either side or in front of shank, as
described and shown in Figs. 1, 2, and 3.
2. The use in a toolholder of a cone either split or not split, as described and
shown in Figs. 1, 2, and 3.
3. The cutter as described and shown in Figs. 4 and 5.
Dated his Wouth la..
1000
GEORGE ERNEST SHERWIN.