IMPROVEMENTS IN SEWING MACHINES FOR WORKING THE SAME WITH ONE OR TWO NEEDLES INDEPENDENTLY OF EACH OTHER, AND USING AS AN UNDER COTTON ANY SIZE OF REEL OF COTTON OR ANY OTHER MATERIAL WITHOUT WINDING THE COTTON ON SMALL BOBBINS, AND TO PRODUCE A LOCK STITCH
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by Louis Silverman and Joseph Richard
Cumming at the Office of the Commissioners of Patents on the 26th November
1880.
LOUIS SILVERMAN, of 63, Regency Street, in the County of Middlesex, and
JOSEPH RICHARD CUMMING, of No. 1, Clara Villas, Manor Park, Little Ilford,.
Essex. "IMPROVEMENTS IN SEWING MACHINES FOR WORKING THE SAME WITH
ONE OR TWO NEEDLES INDEPENDENTLY OF EACH OTHER, AND USING AS AN
UNDER COTTON ANY SIZE OF REEL OF COTTON OR ANY OTHER MATERIAL
WITHOUT WINDING THE COTTON ON SMALL BOBBINS, AND TO PRODUCE A LOCK
STITCH."
On each side of the front part of the machine we propose to fix two parallel iron
bars; a plate having four holes corresponing with the bars should slide on it.
In the front of the arm, and also in the plate sliding on the bars, to be a horizontal
slide for holding the needle moving up and down. The needle holder is to be
worked by a shaft running parallel with the arm by means of a crankplate of such
a shape as only to press the needleholder down and compress a spring attached to
it, which will rise the needleholder so as to allow the crankplate after having made
a revolution to press the needleholder again down, and so on. To make the plate
on the iron bars move to and fro we propose to have the shaft which runs parallel
with the arm hollow, and insert another solid shaft in it. The crankplates for
working the needleholders is to be fixed for the sliding plate on the solid shaft,
and for the one fixed on the front part on the arm on the hollow shaft. To make
both shafts revolve the same time from one wheel on the hollow shaft we propose
to make a narrow long slit in the hollow shaft and insert a pin through the solid
shaft, so as by revolving the hollow shaft will take with it through the agency of
the pin the solid shaft, the same time allowing the solid shaft to move to and fro.
The solid shaft is revolving in the sliding plate and fastened thereto. By sliding
the solid shaft the plate is made to slide also. Further, we propose to have under
the body of the machine on which the arm of the machine rests another shaft, of
the same construction as for the working of the two needles. Underneath the
body of the machine, and just under the needle points, we propose to have a
similar cage for holding a reel of cotton, silk, or any material and any size, such as
usually sold for working sewing machines. This cage to be laid in a holder made
so as to allow the cage being taken out of the holder, and which is fixed to the
shaft under the body of the machine, one cage and a holder each for the hollow

page_text: and solid shafts, and consequently for each needle. The hollow shaft under the
machine will be worked by an eccentrick from the hollow shaft on top of the
machine, and should not revolve but describe a half circle. Both solid shafts
which are to project of the hollow shaft on the back of machine are to be
concealed by means of rings fastened to them, and having a deep groove running
round them, a long piece of iron holding a fork on each side fitted in the groove of
the rings on the shafts have a hole in its centre in which a screw is inserted and
fixed to the back part of the arm. By turning of the screw both solid shafts will
move alike to and fro. The working of the machine is as follows:-When the
needle is down and has formed a loop under the machine the cage, which has a pointed
front, moves forward and puts its point through the loop, and will then be in a
slanted position with its point downwards. The needle by making its way up
will pull the loop over the cage, and the projecting cotton from the reel in the cage
with it and form a stitch. The crankplate for working the needle on the sliding
plate we propose to detach it by some arrangement similar to a clutch from the
solid shaft, so as to allow the machine to be worked by single needle or by both.