Improvements in Sewing Machines
Year: 1898

page_text: Date of Application, 15th Nov., 1898-Accepted, 28th Jan., 1899
mmunicattų nom road by THE INDUSTRIAL MANUFACTURING COMPANY, a
company organised under the laws of the State of New Jersey, United States
of America, and having its place of business at 117, Federal Street, Camden,
New Jersey, United States of America.]
Improvements in Sewing Machines
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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:―
In
My invention relates to devices for feeding goods or fabrics under a stitching
needle, and more particularly to such devices, which are employed for feeding
knit or other elastic goods on a two-thread or over-seam sewing machine.
sewing knit goods on such machines I have found, that, when an ordinary feed,
comprising a common feed bar and presser foot, is used, the fabric was stretcheri
at the line of sewing, in such measure as to distort the shape or edges of the fabric
operated upon. This is entirely overcome if the goods directly in front of the
needle are gathered quicker and faster than immediately under and in rear of
the needle. To this end I provide two separate presser feet, one in front of the
stitching needle, and the other partly surrounding the needle and extending in
the rear thereof, the former pressing harder against the feed bar than the latter
by means of adjustable springs; and a feed bar with two sets of teeth, large or course
teeth in the front portion under the presser foot having the strong tension spring
and small teeth in a different plane from the large teeth, under the presser foot
in rear of the needle.
I
My invention will be more fully understood taken in connection with the
accompanying drawings, forming part hereof, in which my improved feeding
device is shown in connection with an over-scain sewing machine, for which I
hold the British Patent No. 9590 of April 26, 1898, and it will be apparent to
those skilled in the art to which my invention pertains, that the feeding device
may also be applied to other types of sewing machines. In the drawings:-
Fig. 1, is a plan of a cloth plate, shewing the two presser feet and their
accessory mechanism.
Fig. 2, is a front view of the same showing also the feed bar.
Fig. 3, is a sectional elevation showing the feed, the two presser feet and also
the stitching needle arm; and
Fig. 4, is a perspective view of the two presser feet and the feed bar.
Referring now to the drawings for a further description of my invention, A is
the cloth plate of a machine, a, the throat plate, B the main shaft, C the needle
arm and the stitching needle. On the cloth plate A are provided two lugs a',
in which a hollow shaft i is journalled; inside this hollow shaft is provided
another shaft e, which projects at each end from the hollow shaft i. On one
end of this shaft is secured a lever arm e', carrying on its free end the presser
foot es, and on the other end is attached an arm e; a stud is secured to a
..מ
077

page_text: The outer end of the stud
portion of the machine frame and a spring e surrounding the said stud is
interposed between said arm e¹ and said frame portion es to keep the said foot
is
normally pressed against the throatplate_a.
threaded and provided with a milled nut e to adjust the pressure with which the
foot is to bear upon the fabric.
The hollow shaft is provided with an arm ', having secured to its free end
the presser foot 3, and this arm has an extension, by which said foot 22
is brought to bear more or less on the fabric to he sewed. On the cloth plate A
and protruding through the extension, is attached a stem i, threaded at its upper
end for a nut a spring is placed between the extension and nut and
its tension may be increased or decreased by the said nut, to impart proper
pressure to the said presser foot 12.
A handle with a cam shaped end bearing on the cloth plate A, is pivoted to
the extension, to lift both the presser feet 2 and 3, so as to facilitate the
insertion of the fabric between the said feet and the feed bar f, as will be more 1
fully described.
The feed bar is operated in the usual or any preferred manner; in Fig. 3
the feed bar is shown fastened to an eccentric strap f, which has a longitudinal
motion from the oscillating plate p, and an up and down motion from the
eccentric on the main shaft B. The feed bar f is provided with two sets of
teeth and f, the former are small, and act in conjunction with the presser
foot e having a light pressure imparted by its tension spring e, and the set of
teeth are coarser, extend above the teeth f³, as shown in Figs. 3 and 4, and act
in conjunction with the presser foot having a strong tension spring .
In the vertical motion of the feed bar f and at its highest position, the small
teeth project only a little above the throat plate a, and disappear or recede
under the latter much quicker than the coarse teeth f*, so that the feeding of fabric
is continued under the presser foot, while that under the foot is discontinued,
which has the effect, that the fabric is gathered quicker in front of the stitching
needle than in the rear thereof, by which the elastic fabric is fed in such a
manner, that a distortion thereof or its edge is impossible.
The presser foot is provided with a bevelled edge on the lower face and in
rear of the foot, whereas the presser foot e³ has a corresponding bevelled edge es
with the edge on top and at the front of the foot e², and these bevelled edges
serve a twofold purpose, firstly, the fabric can easily pass from under the foot
to under the foot e, and secondly, when the foot is raised by means of the
handle, its bevelled edge engages the bevelled edge es of the foot and raises
the same so that the goods to be operated upon may be inserted between the feed
bar and the said presser feet 22 and es.
The presser foot e is provided with the usual tongue e necessary for the
formation of an over-seam double thread stitch and is extended sideways as at e10,
BO that a continuous chain of stitches may be formed if a piece of fabric has been
fed through the machine; the presser foot eserving to keep such chain of
stitches in order even when a new piece of fabric to be operated upon is inserted
under the presser foot 2, so that no entangling of threads at this point is possible.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondents I declare that what I claim is:-
1. In a sewing machine in combination with stitch forming mechanism, a
feeding device comprising a feed bar having one end thereof provided with a set
of coarse teeth and the other end with a set of finer teeth, the latter having their
apexes below the apexes of the coarser teeth, a presser foot operating in
conjunction with the set of coarse teeth, a spring for said presser foot, another
presser foot operating in conjunction with the set of finer teeth, and a spring of
lesser tension than the aforesaid spring for the last mentioned presser foot, sub-
stantially as and for the purposes set forth,
.
5

page_text: 2. In a sewing machine in combination with stitch forming mechanism a feeding
device comprising a feed bar f having two different sets of teeth f³ and f*, a
presser foot over one set of teeth, a presser foot over the other set of teeth,
bevelled edges 8 and 8 on the respective feet, and a handle 7, substantially as
and for the purposes set forth.
HASELTINE LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.