An Improved Tool Holder to be Employed in Screw Cutting and other Lathes.
Year: 1894

page_text: Date of Application, 17th Mar., 1894
Complete Specification Left, 20th Oct., 1894-Accepted, 24th Nov., 1894
PROVISIONAL SPECIFICATION.
An Improved Tool Holder to be Employed in Screw Cutting and
other Lathes.
We, WILLIAM COPLEY, of 44, Parkinson Lane, Halifax, in the County of
York, Engineer, and ARTHUR RAMSDEN COPLEY, of Thomas Street South,
Parkinson Lane, Halifax, aforesaid, Mechanic, do hereby declare the nature of
this invention to be as follows:-
This invention has reference to the tool holders employed in holding cutters in
lathes when forming screw threads or other like purposes.
In constructing a tool holder according to our invention we employ a metal tube
formed with two internal diameters. We also employ within this tube two steel
circular dies shaped to suit the different kinds of cutters employed. These circular
dies, together with the cutter, can be twisted in the tool holder to suit any angle
for cutting purposes, after which the tool holder, which is severed at the upper
part, can be tightened and drawn together by bolt or other means, whereby the
cutter is firmly held in position at any required angle. This method of holding
the cutter in the cutting tool, permits of its being easily removed for grinding
purposes, and of being replaced again, and as we propose to make the cutters to a
standard size, very little grinding will be required and the use of a blacksmith
usually required for shaping the cutter will be unnecessary.
Dated this 16th day of March 1894.
TASKER & CROSSLEY,
Halifax, Agents.
COMPLETE SPECIFICATION.
An Improved Tool Holder to be Employed in Screw Outting and
other Lathes.
I, WILLIAM COPLEY, of 44, Parkinson Lane, Halifax, in the County of
York, Engineer, and ARTHUR RAMSDEN COPLEY, of Thomas Street South,
Parkinson Lane, Halifax, aforesaid, 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 :-
This invention has reference to the tool holders employed in holding cutters in
lathes when cutting or forming screw threads or other like purposes.
Such being the nature and object of our invention we will make reference to the
accompanying sheet of drawings in order to describe our improvements more fully.
Fig. 1 is front elevation of our improved tool holder, Fig. 2 is plan view of
same, Fig. 3 end elevation, and Fig. 4 section through line a, b, of Fig. 1.
A represents a barrel or tube formed with a circular hole in it. The upper
portion of the tube is split at B to permit that portion of the tube to be reduced
slightly in diameter by tightening the set screw C. The cutting tool is shewn
at D and it is placed within two steel circular dies E shewn more fully in Fig. 5.
The cutting tool together with the dies E are nserted into the tube A, after which
the set screw C is tightened up so as to fasten and make the two steel circular dies
secure. These dies together with the cutting tool can be twisted or turned partially
around within the tube A as shewn in Figs. 6 and 7 so as to suit any angle of
cutting.

page_text: This method of holding the cutter D in the cutting tool permits of its being
easily removed for grinding purposes and of being replaced again and as we
propose to make the cutters to a standard size a very little grinding will be required
and the use of a blacksmith usually required for shaping the cutter will be
unnecessary. When the cutter is new, it can be made of considerable length as
shewn in the drawings and to make it more handy, each end of the cutter can be
shaped ready for cutting.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
The improved tool holder comprising circular dies such as E tightened and
fastened in the tube such as A all constructed, arranged and operating in the
manner shewn in the drawings.
Dated this 19th day of October 1894
TASKER & CROSSLEY,
Halifax, Patent Agents.