Improvements in Cutting Tool Holders for Lathes and other Machines.
Year: 1891

page_text: Date of Application, 30th Dec., 1891
Complete Specification Left, 30th Sept., 1892-Accepted, 5th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in Cutting Tool Holders for Lathes and other
Machines.
I, WILLIAM PATMORE, of 157 Hartfield Road, Wimbledon, in the County
of Surrey, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in cutting tool holders for lathes and other
machines and has for its objects the attainment of greater facility in adjustment
and simplicity of construction than obtains in the case of other similar tool holders
as hitherto constructed.
In carrying my invention into effect I construct a circular tool box, provided
with an angular slot for holding the rectangular piece of steel that is to form the
cutter, and which is held in position by a set screw passing through the top of the
circular tool box aforesaid.
A hollow metal bar of suitable size and cross sectional shape to render it easy of
attachment within the clips or tool box of the lathe or the like, is formed with a
semicircular recess at one end, and a metal ring fits therein. Said ring is attached
to, or formed upon a spindle or pin, which passes through the hollow bar aforesaid,
and may be drawn tightly therein by means of a nut at one end, thus contracting
the circular orifice of the ring within the recess at the other end. When this
spindle or bolt is eased by slacking the nut at the end of the bar, the circular tool
box holding the cutter may be placed in the ring, and adjusted to any height or
angle, and is firmly held in such position by being jammed between the ring and
the edges of the recess. In order to prevent the ring from turning round when
slackened, the central spindle may be provided with a key, feather or pin, or may
be formed square.
Dated this 21st dow of December 1901
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Cutting Tool Holders for Lathes and other
Machines.
I WILLIAM PATMORE of 157 Hartfield Road Wimbledon in the County of
Surrey 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 relates to improvements in cutting-tool holders for lathes and other
machiues and has for its objects the attainment of greater facility in adjustment
and simplicity of construction than obtains in the case of other similar tool holders
as hitherto constructed.
And in order that my invention may be fully understood I will proceed to
explain the same with reference to the accompanying sheet of drawings in which
Figure 1 represents an elevation partly in section of a lathe tool holder con-
structed according to my invention.
Figure 2 is plan of same partly in section.
The same letters denote the same parts in both figures.
Now according to this invention I construct a circular tool-box a an form
therein an inclined slot 6 for holding the cutter c which may be of any desired
DO77

page_text: material or section and is held in position by the set-screw d which engages with a
screw thread in the tool box a. I provide also a hollow metal bar e of suitable size
and section to suit the clips or tool holder of the lathe and shape the same at one
end to fit the tool box a which is clamped to the bar e by means of the ring f
which is attached to or formed integral with the rod which
g
said bar and has a screw thread formed thereon at h.
passes through the
The tool-box a passes through the ring and is clamped in any desired position
by screwing up the nut i.
When the nut is unscrewed the tool-box a may be moved up and down in the
ring and rotated in either direction through any desired angle but when the said
nut is tightened the ring f presses the tool-box a against the shaped portion of the
bar e and clamps it firmly in the required position.
The ring f is preferably bored on the inside to fit the tool-box a.
Instead of the clamping screw shewn in the drawings I may tighten the ring by
means of a wedge or cotter.
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
First. In cutting-tool holders for lathes and other machines the use of a
rotating tool-box in combination with a clamping ring and screw wedge or cotter
substantially as described.
Second. In cutting-tool holders for lathes and other machines the combination
of an adjustable tool box having an inciined slot therein to receive the cutter and
rotating in a metal ring with a hollow bar and clamping screw substantially herein-
before described and shewn by the accompanying drawing.
Dated this 30th day of September 1892.
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for Applicant.