Improvements in Machine Toolholders.
Year: 1899

page_text: Improvements in Machine Toolholders.
ROBERT WILLIAM MOYES, 20, Russell Street, Stepney, E., Engineer, do hereby
declare the nature of this invention to be as follows:-
My invention consists of a toolholder for use principally in engineers lathes,
but can be used generally in most machine tools. It consists of a straight,
square or flat shank to be held in slide rest on an ordinary lathe and on one
end I forge (or cast) an additional piece standing at right angles to the shank,
the object of this being to obtain greater rigidity and less spring" by its
coming into direct contact and bedding down on the vertical portion of the slide
rest.
In the front of this toolholder I cut a square or other shaped hole into
which is inserted the various tools which are held in position by a set screw
(or other means as may be found expedient) and can be changed for different
kinds of work. By this arrangement I set the tool at such an angle as to greatly
facilitate their cutting.
At other end of toolholder I insert another tool usually for boring purposes,
this end being quite parallel for this particular work.
On the end of holder that is made with a projection at right angles as
above described I arrange set screw going right through, thereby enabling the
same rigidity to be obtained off slide rest in the event of the tool being made too
long (or made long to allow for grinding) and thus standing through and prevent-
ing the toolholder bedding down on the side of slide rest, the said screw being
sufficiently long to admit of any necessary adjustment.
uט : נ.י.מ
T1000
Improvements in Machine Toolholders.
I, ROBERT WILLIAM MOYES, 20, Russell Street, Stepney, E., 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:
My invention consists of a toolholder for use principally in engineers lathes,
but can be used generally in most machine tools. It consists of a straight,
square or flat shank to be held in slide rest on an ordinary lathe, and on one
side I forge (or cast) an additional piece standing at right angles to the shank,
TD 077

page_text: the object of this being to obtain greater rigidity and less spring" by its
coming into direct contact and bedding down on the vertical portion of the slide
rest. In the front of this toolholder I cut a square or other shaped hole into
which is inserted the various tools, which are held in position by a set screw
(or other means as may be found expedient) and can be changed for different
kinds of work.
By this arrangement, I set the tool at such an angle as to greatly facilitate
their cutting. At other end of toolholder I insert another tool usually for boring
purposes, this end being quite parallel for this particular work.
On the end of the holder that is made with a projection at right angles as
above described, I arrange set screw going right through, thereby enabling the
same rigidity to be obtained off slide rest in the event of the tool being made too
long (or made long to allow for grinding) and thus standing through and prevent-
ing the toolholder bedding down on the side of slide rest, the said screw being
sufficiently long to admit of any necessary adjustment.
For purposes of illustration, I will now refer to the annexed drawings in
which
Figure 1, is a side elevation of my toolholder in position.
Figure 2, plan view of same.
a is a toolholder which is formed of any suitable material, and has the enlarge-
ment or projection 6 for the purpose of carrying the tool c which is secured in
the recess or channel therein, through the medium of the set screw d which grips
the tool. The set screw e is for the purpose of bearing upon the surface f of
the slide rest 9 so as to give the required rigidity when desired, or in the event
of the end of the tool c not projecting at h this screw may if desired be dispensed
with. The other end of this toolholder a is bored or recessed for the reception
of the tool which is secured therein through the medium of the set screw k
this end of the tool holder being adapted particularly for carrying tools for
boring purposes. The projecting portion b when bearing against the slide rest
directly or through the medium of the adjusting set screw e gives great rigidity
and minimises what is known as chattering."
"
Of course it will be seen that this form of toolholder may be employed for
various purposes although I have described it as applied to a turning lathe.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. The toolholder, substantially as described and illustrated herein and for
the purpose set forth.
2. In toolholders, the employment upon a shank of suitable material of a
projection or enlargement carrying the tool, which is secured therein through
the medium of a set screw, with or without an adjusting screw, an aperture at
the other end of said shank in which a tool may be secured through the medium
of a set screw, substantially as described and illustrated herein and for the
purpose set forth.
Dated this 30th day of October 1899.