Year: 1896

page_text: I, WILLIAM CLARK of the Firm of A. M. & Wm. Clark, 53 Chancery Lane in
the County of Middlesex, Fellow of the Institute of Patent Agents do hereby
declare the nature of this invention which has been communicated to me from
abroad by The Deutsche Nähmaschinenfabrik von Joseph Wertheim of Frankfort-
on-Main, Germany to be as follows:-
This invention relates to boot sole-sewing machines for turned over work, in
which the use of a straight needle is rendered possible, this result being attained
by reason of the work table being undercut obliquely at its front end, and a feed
for the material of a known kind consisting of a pair of pitch chains having teeth
on their outer surface which carry the material forward whilst their inner surface
is smooth, the said chains being actuated by means of a driving pulley or star wheel
on an inclined shaft. This arrangement however is open to objection as the chain is
too slight and consequently of insufficient strength for the work it has to perform and
moreover the driving is uncertain.
The object of the present invention is to obviate these objections and it consists
in substituting for the said chain feed device a toothed ring mounted to rotate in a
corresponding groove in the work-table, and be driven by a toothed wheel meshing
with the feed teeth and mounted on an axis which may be horizontal notwithstanding
that the plane of the feed ring is inclined to the perpendicular.
The accompanying drawings illustrate the invention. Figs. 1 and 2 are side and
front elevations of the entire machine provided with the improvement and Figs. 3
and 4 are sectional views of two different forms of the improved feed device on an
enlarged scale.
a is the frame of the machine in which are arranged as usual the needle, the needle
bar driving shaft c, the shuttle driving shaft d and the feed actuating shaft / which
latter may be driven either by toothed gear or by ratchet and pawl mechanism as
shewn in Figs. 1 and 5 and in any case prevented from backward rotation, during
intermission of the feed.
J, Fig. 4 is the new feed ring which is mounted in the work table T and held
against lateral movement. Upon the shaft there is mounted a toothed wheel K
having bevel teeth meshing with the teeth of the feed ring, the ring may however be
driven in any other suitable way. In Fig. 3 two feed rings are shown.
Dated this 10th day of September 1896
A. M. & WM. CLARK,
53 Chancery Lane, London, Chartered Patent Agents.

page_text: A Boot Sole Sewing Machine.
I, WILLIAM CLARK of the Firm of A. M. & Wm. Clark of 53, Chancery Lane
in the County of Middlesex, Fellow of the Chartered Institute of Patent Agents,
do hereby declare the nature of this invention (a communication to me by The
Deutsche Nähmaschinen-Fabrik von Joseph Wertheim of Frankfort-on-Main,
Germany,) 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 boot sole-sewing machine for turned over work, in
which the use of a straight needle is rendered possible by the form of the work
support and the arrangement of the feed, and the object of the present invention
is to obviate the objections to the chain feed device heretofore used and it consists
in substituting for the said chain feed device a toothed ring mounted obliquely to
rotate in a corresponding groove in the work-support and driven by a toothed
wheel which meshes with the feed teeth themselves and which is mounted on a shaft
which is horizontal notwithstanding that the plane of the feed ring is inclined to the
perpendicular.
Reference is to be had to the drawings accompanying my Provisional Specification
wherein Figures 1 and 2 are side and front elevations of the machine and
Figures 3 and 4 are sectional views of two slightly different forms of the improved
feed device drawn on an enlarged scale. Figure 5 shews a detail.
a is the machine frame, c the needle bar driving shaft, d the shuttle driving shaft,
and the feed actuating shaft which latter may be driven either by toothed
gear or by ratchet and pawl mechanism m, as shewn in Figures 1 and 5, an I
is in any case prevented from backward rotation during intermission of the feed.
J, Figure 4, is the feed ring mounted to rotate in a groove in the work support
and held against lateral movement. Upon the shaft there is mounted a bevel
toothed wheel K in gear with the teeth of the feed ring.
In Figure 3 two feed rings are shewn similarly mounted and actuated, the needle
passing between them. The ring or rings may however be otherwise driven.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In a boot sole sewing machine the herein described feed device consisting of
a toothed ring or rings mounted to rotate upon the work support about an
oblique axis as described, the ring or rings being actuated substantially in the
manner specified.
Do this 2ond da.. of Anvil 1907
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.