Improvements in Lathes for Manufacturing Buttons and other similar articles out of Horn, Bone, Mother-of-Pearl and the like
Year: 1891

page_text: Date of Application, 22nd Dec., 1891-Accepted, 6th Feb., 1892
COMPLETE SPECIFICATION.
Improvements in Lathes for Manufacturing Buttons and other
similar articles out of Horn, Bone, Mother-of-Pearl and the like.
1, JOHANN FRANZ HOKLAS of Altona in the Empire of Germany, 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 for improvements in lathes for manufacturing buttons and other
similar articles out of horn, bone, mother-of-pearl and the like, relates to an
arrangement of a lathe for turning and piercing horn, bone, mother-of-pearl and
the like by which the article is worked on both sides at a single fixing of the
article. Lathes of this kind, in which the turning and piercing tools held in head-
stocks work upon the object which is firmly fixed, have long been in use especially
in the manufacture of buttons, but a complicated arrangement of the spindles has been
used causing a more rapid wear of the same, besides other numerous disadvantages
in the process of manufacture. In a lathe constructed according to this invention,
the object which is fixed by means of a clamp is moved against both the piercer
and the cutter which both have a rotary motion only. In this way the con-
struction of the turning lathe is simplified, the wear is lessened, and a greater
facility in the working is attained in consequence of the greater handiness of the
process.
In the accompanying sheet of drawings
Fig. 1 is a side elevation of a turning lathe constructed according to this
invention.
Fig. 2 is a vertical section on the dotted lines A B.
Fig. 3 is a plan to a slightly larger scale.
Fig. 4 an elevation and Fig. 5 a section of the same.
Figs. 6 & 7 show a part of the clamp for holding the articles.
Between the two headstocks O, O' fixed on the bed of the lathe is a saddle /
which can be fixed in any desired position and in which slides a rod a which can be
operated backwards and forwards in a horizontal direction. On the upper portion
of this rod is a guide f in which a slide i can be fixed by means of the screws r.
The clamps are carried by the slide and can be slid towards either headstock. The
motion of the rod a in a straight line and parallel to the clamp is effected by means
of the hand-lever H mounted in the body of the saddle h and operates, through the
levers 2,2, which are linked together, the bar a in such a way that by moving
the hand lever H to the right, the rod a together with the clamp which is mounted
on it, approaches the piercer on the right, whilst by moving the lever to the left, the
clamp is moved towards the left.
The clamp consists of two halves, of which the one can be adjusted in the
guide whereas the other can be moved on the pivot p which oscillates in the
links adjustably fixed to the lower portion of the half by means of the side
nuts m. In consequence of this arrangement both halves can be adjusted to each
other according to the thickness of the object to be manufactured, whilst the half
can be turned down out of the way, for instance in inserting the pieces b, b' between
which the button K is fixed prior to the cutting.
The process of working the new contrivance is as follows:-A sheet of horn,
bone, mother-of-pearl or such like, is placed between the halves l, which are
pressed together by gripping the handles at the top of the clamps in one hand or
in the case of harder substances, such as mother-of-pearl being used the two halves
After this, with the other hand,
can be firmly fixed together by means of a screw.
the lever His operated first in one and then in the opposite direction, until the

page_text: button is completely cut out, and falls into a bowl. By means of-the arrangement
of lathe thus described a great increase of rapidity in the work takes place, and
the saddle, with the parts carried by it, can be set to any lathe with double
headstocks at little cost.
my said
Having now particularly described and ascertained the nature of
invention and in what manner the same is to be performed I declare that what
I claim is :-
1. In a lathe with double headstocks for the manufacture of buttons and the
like, the arrangement of the parts for the reciprocal motion of the object during
its manufacture, consisting of the saddle h, of the rod a sliding in the saddle so
that the same can be shifted to and fro by means of a hand lever H and
links, 2, 1, and of a clamp fixed to the rod in the guide f for the object to be
manufactured, the clamp consisting of parts of which the one oscillates from a
pivot pin the links adjustably fixed to the other half, whilst the latter is
immovably fixed on a slide in the guide fat right angles to the bed, the whole
substantially as described.
2. The improvements in lathes for manufacturing buttons and other similar
articles out of horn bone mother-of-pearl and the like, substantially as described
with reference to the drawings.
Dated this 22nd day of December 1891.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, Agents.