Improvements in Slide Rests and Tool Holders for Lathes.
Year: 1897

page_text: Date of Application, 1st June, 1897-Accepted, 10th July, 1897
COMPLETE SPECIFICATION.
Improvements in Slide Rests and Tool Holders for Lathes.
1, HEINRICH SANDMANN of 17 Taschenstrasse, Breslau in the German Empire,
Metal Founder, 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 relates to a new or improved tool holder which may be used in
combination with or as part of a slide rest, or with a carriage or slide, in lathes.
Its object is to enable a tool to be thereby adjusted readily and firmly, without the
aid of packings of any kind.
I will describe my said invention with reference to the accompanying drawings
which represent my improvements as applied to the top slide of an ordinary slide
rest, or to a carriage which may be adjusted directly upon the lathe bed.
Figure 1 shows a transverse section, the tool being required to be in a horizontal
position. Figure 2 shews a plan of the arrangement Figure 1. Figures 3 and 4 are
similar views of the apparatus when the tool is required to havo its point raised.
Figures 5 and 6 are again, similar views of a modified construction.
The upper surface of the slide a is formed to the shape of the segment of a
cylinder as shown by Figures 1 to 4 inclusive, or to the shape of the segment of a
sphere as shown by Figures 5 and 6. The tool plate o is constructed in either case,
to rest conformably and movably upon the plate a. It has therefore formed on its
under surface a recess corresponding with the segment of the cylinder or with the
segment of the sphere upon which it has to be fitted. In the contre of the slide
there is fixed the vertical screwed pillar b, upon which a suitable clamp such as e is
arranged. This clamp may be provided with the screws ff by which the tool is
held upon the plate c.
There is an opening through the centre of the tool plate for the passage of the
tool pillar b. In the forms illustrated by Figures 1 to 4 inclusive, this opening may
be formed by a slot having its axis at right angles with the axis of the cylindrical
part, as seen in Figure 2. This suffices because, independently of the adjustment
of the slide itself, the adjustment of the tool plate can be made in one direction
only. Where however the adjustment of the tool plate alone can be made in more
than one direction, as in the modification represented by Figures 5 and 6, the
opening may be circular, as in Figure 6.
In use, the clamp having been eased by loosening the nut above it, the tool is
inserted and the tool plate is adjusted until the point of the tool is in the desired
position. The clamp is then tightened down upon the tool whereupon both the
tool and the tool plate become fixed upon the slide a. Any convenient form of
clamp may be used.
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. An adjustable tool holder for lathes, constructed substantially as hereinbefore
described and as illustrated be the coromaning dumine.

page_text: 2. The combination and arrangement in a lathe tool holder, of a support having
a curved upper surface and a tool plate arranged above the support and having
its lower surface conformably shaped, together with means for clamping the tool
and tool plate; substantially as herein before described and as illustrated by the
accompanying drawinga.