Improvements in Sole Sewing Machines.
Year: 1893

page_text: Date of Application, 30th Dec., 1893
Complete Specification Left, 1st Oct., 1894-Accepted, 10th Nov., 1894
Improvements in Sole Sewing Machines.
I WILLIAM HENRY DORMAN, of The Hawthorns, Newport Road, Stafford, in
the County of Stafford, Engineer do hereby declare the nature of this invention
to be as follows :--'
"
This invention consists in an improvement in sole sewing machines of the kind
used for stitching the soles to the welts of boots or shoes or to that part
which takes the place of the welt and is a further improvement of the "pearler
described in the Specification of former Letters Patent granted to me No. 5538
and dated A.D. 1889.
In order that such a "pearler" as therein described may remain in its forward
position for the longest possible time required to control the thread until the stitch
is quite completed I impart to it a movement in the direction of the feeding move-
ment of the work which movement removes the "pearler" out of the way of the
awl which is allowed to work past the "pearler" conveniently through a hole
pierced in the "pearler" stock. I am thus enabled to maintain the "pearler" in.
its forward position and so control the place of the thread at all times except when
the needle point is below the work.
This is especially advantageous when using a shuttle, bobbin or other appliance
for producing a lock stitch as any disturbance of the thread by the shuttle or
take-up during the formation of the stitch is liable to produce a cross, irregular or
other than "pearled" stitch.
A convenient method of giving the desired movement to the "pearler" is to
attach the same to the feed slide at a point near the awl stock pivot by means of a
large headed screw working in a slot formed in the lower part of the feed slide in
such a manner that while the backward and forward movement of the "pearler"
due to the cam which operates it and the up and down movement due to the
opening and closing of the work table are not interfered with the "pearler" is at
the same time obliged to partake of the feeding movement which the feed slide
imparts to the awl, carried in the awl stock upon the feed slide.
The slide-way in the table segment in which the "pearler" slides is so formed as
to permit of the new movement being given to the "pearler."
If desired the "pearler" instead of being attached to the feed slide may be
borne forward in contact therewith by means of a spring provided in the table
segment or otherwise conveniently arranged in such a manner that the movement
of the feed slide shall be imparted to the "pearler."
Dated the 29th day of December 1893.
WILLIAM HENRY DORMAN, of The Hawthorns, Newport Road, Stafford, in
the County of Stafford, 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 consists in an improvement in sole sewing machines of the kind
used for stitching the soles to the welts of boots or shoes or to that part which

page_text: takes the place of the welt and is a further improvement of the "pearler" described
in the Specification of former Letters Patent granted to me No. 5538 and dated
A.D. 1889, which Specification contains a full description of the construction and
operation of the pearler as I have hitherto used it. It will therefore only
be necessary in describing this my present invention to illustrate and describe the
parts immediately concerned in the improvements I now make.
"
In the accompanying drawings
―
Fig. 1. is a side elevation of a portion of a sole sewing machine.
Fig. 2. is a front view of the same.
Fig. 3. is a vertical section through the feed slide, the "pearler" slide and the
table segment on the line A. B,
Fig. 4. is a horizontal section of the same on the line C. D.
Fig. 5. is an alternative construction shewn in horizontal section on the same
line.
It is desirable in order that the "pearlerj" should control the thread as perfectly
as possible that it should remain the longest possible time in its forward position
against the lip until the stitch is quite completed.
In order to effect this I impart to the "pearlerj" a movement in the direction of
the feeding movement of the work which movement removes the "pearlerj" out of
the way of the awl a which is allowed to work past the "pearler" conveniently
through a hole or a notch formed in the "pearler" stock. I am thus enabled to
maintain the "pearler j in its forward position and so control the place of the
thread at all times except when the needle point e is below the work.
95
This is especially advantageous when using a shuttle ¹ bobbin or other appliance
for producing a lock stitch as for instance in the machine described in the
Specification of Letters Patent granted to me No. 23267 A.D. 1892, in which any
disturbance of the thread "m" by the shuttle "" or take up "o" (see above
Specification) during the formation of the stitch is liable to produce a cross,
irregular or other than "pearled "stitch.
For the purpose of giving the desired movement to the "pearler" I attach it
to the feed slide e by means of a large headed screw d working in a slot d formed
in the lower part of the feed slide so shaped as to allow the "pearler j" to be
moved backward and forward by the machine while at the same time the table H
can be opened and closed and is free to adapt itself to the thickness of the
work.
The slideway o in the table segment D' in which the slide n of the "pearlerj"
moves is made sufficiently deep to afford clearance o' for the movement of the
pearler in the direction of the feeding movement of the work to take place.
The "pearler may, instead of being attached to the feed slide c, be borne
forward in contact therewith by means of a spring (see Fig. 5) provided in the
table segment D' and in this manner the "pearler" may be made to partake of
the movement of the feed slide c.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
In a sewing machine of the kind used for stitching the soles to the welts of boots
and in which a +6
pearler" is used to bear forward the thread for the purpose of
producing a pearled stitch; imparting to such pearler a movement in the direction
of the work feeding movement of the machine in order that the thread may be
held forward for the longest possible time as described.
Dated this 29th day of September 1894.
W. H. DORMAN.