Improvements in Sewing Machines.
Year: 1891

page_text: Date of Application, 30th July, 1891
Complete Specification Left, 29th Apr., 1892-Accepted, 4th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Sewing Machines.
I, DAVID RUSSELL DAWSON, of Baltic Chambers, Dundee, North Britain,
Merchant, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to permit the use of a continuous feed of the
work in sewing machines without having a helical needle.
The object in view is to make the needle accommodate itself to the traverse
of the cloth, and I attain this object by allowing the head freedom to oscillate
so that the needle may move along with the cloth while it is engaged therein,
and then spring back ready for another stitch. This may be done by the cloth
carrying the needle and head along with it, and a spring may be provided
which causes the head to spring back after the needle has passed through the cloth,
or the oscillation of the head may be effected by a cam actuated by the moving
parts of the feed chain or otherwise.
Dated this 28th day of July 1891.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.
COMPLETE SPECIFICATION.
Improvements in Sewing Machines.
I, DAVID RUSSELL DAWSON, of Baltic Chambers, Dundee, North Britain,
Merchant, 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 :-
The object of this invention is to permit the use of a continuous feed of the
work in sewing machines without having a helical needle.
The object in view is to make the needle accommodate itself to the traverse
of the cloth, and I attain this object by allowing the head freedom to oscillate
so that the needle may move along with the cloth while it is engaged therein,
and then spring back ready for another stitch. This may be done by the cloth
carrying the needle and head along with it, and a spring may be provided which
causes the head to spring back after the needle has passed through the cloth, or the
oscillation of the head may be effected by a cam actuated by the moving parts of
the feed chain or otherwise.
In order that my invention may be properly understood and readily carried
into effect I have hereunto appended an explanatory sheet of drawings which I will
now proceed to describe.
Figure 1 is an end elevation, and Figure 2 a plan of that part of the sewing
machine to which my invention is applicable.
The machine to which this invention is applicable is of the kind described in
Hunt's Specification No. 2856 of 1878, with the improvements described in my
Specification No. 3,999, of 1890, and the general arrangement is similar, but
instead of having the needle revolving in a fixed head or needle race I give
the needle race an oscillating motion so that the needle may move along with
the cloth while it is passing through and spring back ready for another stitch after
it has passed through.
In the drawing, A is the first motion-shaft, which by means of the toothed wheels
drives the shaft B attached to the needle-driver. a a is the head or race in which
the needle bruns, fitting into the framework and pivoted at c c.
The needle race a a

page_text: carrying the needle, oscillates about the axis ec, so that the needle while passing
through the cloth moves along with it, and while the needle is not engaging in
the cloth the needle head is brought back. The oscillating motion may be
given to the head in various ways; as for instance, the cloth itself may carry the
needle and head along with it, and a spring may be provided so that when the
needle is free from the cloth the spring will pull the head back. The motion may
be given from some moving part of the machine. I prefer to give the motion
according to the method illustrated by the accompanying drawings. Attached to
the shaft B and revolving with it I provide a ring C in which a groove D is cut
all round the circumference forming a cam. A rod dd, free to move backwards
and forwards in the bearings e e, has a notch cut in it, in which the head a a fits.
An arm, f, is bolted at right angles to the rod d d, and carries a friction pulley g
which works in the cam groove D formed on the rings C. By this arrangement as
the shaft B revolves, the bar d d is made to move backwards and forwards during
each revolution of the shaft, and thus the required oscillating motion is given to the
head or needle race.
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 sewing machines of the kind hereinbefore indicated, an arrangement by
which the needle moves along with the cloth while engaged therein and is
brought back after passing through the cloth, substantially as described and
illustrated on the accompanying sheet of drawings.
Dated this 28th day of April 1892.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.