An Improved Cutting-tool or Holder for Turning-lathes, Drilling and other like Machines.
Year: 1890

page_text: Date of Application, 6th Feb., 1890-Accepted, 8th Mar., 1890
COMPLETE
SPECIFICATION.
An Improved Cutting-tool or Holder for Turning-lathes, Drilling
and other like Machines.
I, RICHARD GÄBEL of 10 Pirnaische-Strasse. Dresden, Kingdom of Saxony and
German Empire, manufacturer, 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 an improved cutting tool or holder into which every
kind and size of cutter can be inserted, and which can be used equally well as a
mandrel head on the turning lathe and drilling or other like machine, or as a hand
cutter for cutting or shaping the material when under rotation in the turning lathe or
drilling or other like machine.
The accompanying drawing serves to explain the invention.
Fig. 1 shows the cutting tool or holder in side elevation.
Fig. 2 is a longitudinal section of the tool or holder.
Fig. 3 is a front view, and
Fig. 4 a back view of the tool or holder.
Fig. 5 is a front view of the tool or holder with the covering or centre plate D
left out.
The body of the drill-head or holder A can be made of tempered iron or other
metal, and when meant for use as a spindle head is provided with an inner screw
thread at the hollow back part to enable it to be screwed on to the mandrel or drilling
spindle. The hollow part of the drill-head is furnished with longitudinal openings f
for emptying out shavings. At the front side of the drill-head or holder which is
closed, with the exception of a central flat opening, the cutting plate C is caught with
a spring into a groove and is held by the studs e so that it cannot turn. The cutting
blades themselves can be of any form desired.
Over the cutting plate C is placed a covering plate D, bulged in the middle and
which has a central opening of the diameter of the round metal operated on, for
guiding it whilst it is being cut or shaped. This covering plate D is however not
absolutely necessary, as the metal to be operated can be pointed to a cone shape by
entering it into the cutting opening, and here no special guiding is required.
The cutting plate and the covering plate D are held in position by the rim or
cover B which is screwed over the body A of the head and so secures the plates.
By means of the handle E the tool or holder can be used in such manner that when
the material to be cut or shaped revolves in the turning lathe or drilling machine, the
tool can be held against it.
The bandle E is arranged to screw in and out, so that the tool or holder can be
used either, as a mandrel head or as a hand cutter as may he desired.
It is clear that by changing the cutting plates C and the covering plates D, articles
of different diameters can be cut or shaped.
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 cutting tool or holder consisting of the metal body A (which may be provided
with an inner screw thread so that it can be used screwed on to a spindle head or may
have a handle E which can be screwed in and out for controlling it by hand), the
interchangeable cutting plate C held by the studs e; the covering plate D bulged in
TD JA

page_text: the middle and provided with a central guiding opening d; and the cover B with
screw thread for screwing on to the body A in order to hold the plates C and D fast;
substantially as hereinbefore described and shown on the drawing annexed.
Dated this 5th day of February 1800
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.