Improvement in an Automatic Pushing or Feeding Apparatus for Sewing-machines, Working in a Frame and Acting on the Upper Lay of Fabrics to be Sewn Simultaneously.
Year: 1886

page_text: Improvement in an Automatic Pushing or Feeding Apparatus
for Sewing-machines, Working in a Frame and Acting on
the Upper Lay of Fabrics to be Sewn Simultaneously.
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I, HUGO BERNHARD, Agent, of 69 Railton Road, Herne Hill, London S.E., in
the County of Surrey, 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 employing Sewing Machines there has until now,been the great disadvantage,
that, in passing two or more lays of fabric under the needle, the upper-lay does
not move with the lower one in equal measure, as the stitches proceed, but always
stays a little behind; the reason of this being, that the pushing or feeding only is
effected from below. Experiments have been made in providing a rolling-presser
or to arrange in such a manner, to perform the same movement as the little teeth
on the needle plate; but all these contrivances have proved unsuccessful, because
in its returning movement the "foot" is lifted off the fabric, and therefore cannot
keep it tightly, by which proceedings it is very difficult to execute a fine stitching
in an accurate and straight way.
The present Invention remedies this disadvantage, and it can be used with any
machine. With this new contrivance the foot remains lying on the fabric, but it
receives the form of a frame, in the interior space of which an automatic pushing-
or feeding-contrivance is working, by which the length of the stitches can be
regulated, and which can be entirely removed, when not needed.
Fig. 1 of the accompanying drawings represents the head part of a Singer-
Sewing-Machine, shewn from the back.
Fig. 2 represents the front of the same.
a" shews the well known "foot-bar," to which at its lower part the "foot" is
fastened, the form of which-in side-elevation and plans-is separately illustrated
in Fig. 3, 4 and 5.
To the principal axis an eccentric "6" is fastened, just behind the well known
disc, which latter is provided with the guiding roller for the heart; this eccentric

page_text: "
is to press the bolt, together with the head of the lever "c," outward. This
lever "c" is reposing in a case "d," which latter is fastened to the head of the
machine by the two screws d"; a slit "e" passes through the sides of the
case "d" and the lever "c"; in this slit the bolt "f" provided with screw, is
contrived, and forms the turning point for the lever "c"; the spiral spring "g
presses the head of the machine against the lower arm of the lever "c."
"
By turning the eccentric "b," the lever "c" receives a movement like a
pendulum, which will at its lower arm be the greater, the higher the bolt "f" is
fastened in the slit "e." In this manner every desired length of stitches is
arranged; by means of the connecting piece "h" the movement is communicated
to the lever "," which latter has its link in the foot "k," and the under-surface of
the lever "i" acts directly within the frame of the foot "k," so that the sewing-
material or fabric is always held firm, and the upper-lay of the fabric is equally
pushed forward without lifting the foot.
The lifting of the foot-bar "a" is not interfered with, and the apparatus can be
taken off by unfastening the two screws "d¹."
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is:
An automatic pushing-or feeding-contrivance for Sewing-Machines, working
in a frame and acting on the upper lay of fabrics, to be sewn simultaneously;
this contrivance mainly consisting of a frame-like "foot," a lever in connection with
several links, a case with moveable bolt, a further link of the lever, provided with
a pin or peg and an eccentric, as above described and illustrated.