An Improved Shaping or Turning Tool.
Year: 1897

page_text: Date of Application, 14th Oct., 1897-Accepted, 4th Dec., 1897.
An Improved Shaping or Turning Tool.
A communication by WIEGAND & SEIFERT, MASCHINENBAUANSTALT, GESELLSCHAFT
MIT BESCHRANKTER HAFTUNG of Braustrasse, Leipzig-Plagwitz in the Empire of
Germany, Machine Makers.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E. of the Agency for Foreign
Patent Solicitors 6 Lord Street, Liverpool and 6 Bank Street, Manchester, both in
the County of Lancaster, 118 New Street, Birmingham in the County of Warwick
and 322 High Holborn in the County of Middlesex, Civil 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 relates to a profiled shaped or turning tool for shaped articles,
the profile of which tool remains unchanged when ground. For this object the
tool is profiled and' channelled on its front longitudinal surface which in use is turned
towards the article to be operated on, in a manner to correspond with the article
to be produced, and is not held as usual horizontally but approximating more
to a vertical direction directed downwards against the axis of rotation, so that
cutting grooves and edges result which produce the desired profile.
Such a tool is shown in the accompanying drawings and serves for instance
for making balls. In these -
Figure 1 is a side view of the tool;
Figure 2 a front view, and
Figure 3 a plan view.
The tool shown as an example is intended to simultaneously shape or operate
on several, (in the present instance on two), balls simultaneously in such a way
that one ball is preliminarily operated on while simultaneously the previously
preliminarily operated on ball is finished and cut off. For this object the tool
has as many longitudinal grooves shaped to correspond with the radius of the
ball as it is desired to make balls simultaneously. There results, between the
channels, cutting edges which penetrate into the article to be operated ou.
The tool or chisel a has two longitudinal grooves or channels b and c of which
the channel c is intended for the preliminary shaping of the ball, whilst the
channel b serves for finishing the previously cut out ball. By these channels there
are formed cutting edges e and f, which first penetrate into the article to be
operated on and gradually bring the grooves or channels b and c into action.
An oblique or bevelled side surface d also serves for forming the cutting edge f.
If the cutting edges of the tool become blunt only the upper surface g is ground
so that the profile remains constantly the same. The tool can be worn away almost
to the end, in fact as far as its clamping in the tool holder of the support will allow.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, as communicated to me by my
foreign correspondents, I declare that what I claim is :-
A profiled or shaped turning tool, characterised by the longitudinal surface, which

page_text: in use is turned towards the article to be operated on and directed downwards, being
profiled longitudinally to correspond to the form of the article which is to be made,
so that its edges form the cutting surface, the profile of which is always maintained
intact when the tool is subsequently ground, substantially as hereinbefore
described.