Improvements in Apparatus for Cutting Out Cloth.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Cutting Out Cloth.
I, JACOB PHILIPPSOHN, of 41, Kaiserstrasse, Berlin, S.O., in the 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 relates to that class of apparatus for cutting out cloth in which
a mechanically moved rotary disc knife is employed.
In the said kind of apparatus it has been attempted to lift the cloth when cutting
corners or acute curves, so that the bottom layers will also come into contact with
the middle of the rotary disc knife.
For this purpose, amongst various arrangements, the foot of the apparatus has
been rendered vertically movable, a separate support remaining at the required
time on the table and thus supporting the apparatus whilst lifting the said foot.
The object of this invention is to enable to regulate the vertical movement of
the said support in order to accommodate the apparatus to the diameter of the
said rotary disc knife which in use and on being ground gets constantly smaller.
And in order that my invention may be more fully understood I have caused
to be appended hereunto one sheet of drawing marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a longitudinal section and Fig. 2 an elevation of the apparatus, the disc
knife being left out in the latter figure.
In carrying out this invention b is the foot of the apparatus, which ordinarily
supports the apparatus and is attached to the plate c. The latter carries also the
guard d, the front f of which is also shown removed in Fig. 2.
The drawing represents the foot b momentarily, not as holding but as having
lifted the cloth and thus raised. This is performed by exerting pressure on the
lever g the extension h of which engages in a slot in the plate c and raises the
same.
i
During this time the support i remains on the table and serves simultaneously as
a guide for the plate c. The support is connected to the nut n by means of the
screws k, k', holding between the same the slide m. The nut n engages the thread
of a set screw o, which in an axial direction is rigidly connected with the plate p.
The latter is rigidly fixed to the holder 7 of the apparatus. The slide m is
rendered movable in the slot r of the plate p, the slots of the plate e preventing
the latter contacting with the slide piece m on being raised.
By screwing down or up the set screw o the support i may be raised or lowered
respectively, according to the reduction in diameter of the disc knife a through
constant wear as previously mentioned.
The described device may also be applied to an apparatus in which the foot is
not rendered vertically movable, but it is of special advantage in such apparatus
where the foot is rendered vertically movable.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is-
1st. In apparatus for cutting out cloth having a rotary disc knife a, the employ-
ment of a support i which may be vertically adjusted more or less according to the
reduction of the diameter of the disc knife resulting from the grinding thereof,
substantially as set forth.
2nd. In apparatus for cutting out cloth having a rotary disc knife a, the employ-
ment of a support i which by means of a set screw o may be variably adjusted in

page_text: height according to the reduction of the diameter of the disc knife resulting from
the grinding thereof, the thread of which screw engages a nut n connected rigidly
with the support i, substantially as and for the purpose set forth.
Dated this 27th day of June 1893.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.