IMPROVE- MENTS IN SEWING MACHINES, PART OF WHICH IMPROVEMENTS IS APPLICABLE TO THE DRIVING OF OTHER MACHINERY
Year: 1874

page_text: LETTERS PATENT to Nahum Salamon, of Ludgate Hill, in the City of
London, Sewing Machine Factor, for the Invention of "IMPROVE-
MENTS IN SEWING MACHINES, PART OF WHICH IMPROVEMENTS IS APPLICABLE
TO THE DRIVING OF OTHER MACHINERY."-A communication from abroad
by Henry Lippman and William Lind, both of Hamburg, North
Germany.
Sealed the 21st July 1874, and dated the 4th March 1874.
PROVISIONAL SPECIFICATION left by the said Nahum Salamon at the
Office of the Commissioners of Patents, with his Petition, on the
4th March 1874.
I, NAHUM SALAMON, of Ludgate Hill, in the City of London, Sewing
5 Machine Factor, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN SEWING MACHINES, PART OF WHICH IMPROVEMENTS IS
APPLICABLE TO THE DRIVING OF OTHER MACHINERY," to be as follows:-
This Invention relates, firstly, to improvements on the sewing
machine Patented by William Taylor, August 20th 1866, No. 2136; and

page_text: secondly, to an improved friction gear applicable to sewing machines
generally, and also to other machinery.
The shuttle in the Taylor machine works in an elliptical path, and its
It is
carrier is forked so as to embrace it near the nose and the rear.
retained in the carrier by means of a small spring bolt which passes up
behind the back end of the shuttle, but when the shuttle is required to
be released this bolt is drawn down clear of the shuttle.
As an improvement upon this mode of retaining the shuttle the
carrier is formed with a fixed stop piece which stands in rear of the
shuttle, and the shuttle near its nose is recessed to receive the end of a
tipping piece or spring stop carried by a spindle which has its bearings
in lugs on the back of the carrier. This spring stop is held in the recess,
preferably by a coiled spring surrounding and connected to its spindle.
To release the shuttle it is only necessary to tip the spring stop, and the
shuttle may be instantly withdrawn.
Another improvement on this machine is to substitute for the sliding
fulcrum used for regulating the length of stitch a bowle carried in the
fork of a rock lever. The rocking of this lever on its pivot pin will
cause the bowle to act as a fulcrum against a higher or lower portion of
a lever which is pin-jointed to the slide that carries the serrated feed
plate, and is held up to and acted upon by one of the feed cams to give
the traverse motion to the feed plate and so to the work.
As an improvement in the driving gear a gripping elastic lateral
pressure is employed for transmitting rotary motion from the driving
wheel. One mode of applying this improvement is by forming an annular
groove in the periphery of the driving wheel to receive the square edge
of a compound disc which is carried by the shaft to be driven. This
compound disc will fit into the groove of the driving wheel and bear
against the side thereof.
The compound disc is made in two parts, which parts are dished to
receive between them a coiled spring; one of these parts is keyed to the
shaft to be driven, and the other fits loosely thereon and is capable of
being adjusted laterally (by means of a screw) to ensure the biting of
the compound disc against the sides of the groove in the driving pulley..

page_text: The action of the enclosed spring will be to force the two parts of the
compound disc from each other. As therefore the disc rolls in the
groove
of the driving wheel it will bite against the sides thereof, and the
liability so common to friction gear of the parts in contact to slip will
be avoided. This mode of applying clastic lateral gripping pressure may
be variously modified; for example, the compound disc may be grooved
to receive an annular projection formed on the driving wheel, and it
may be caused to nip this projection by the aid of a spring or springs
provided for the purpose. Or the driving wheel may itself be divided
and act the part of the compound disc, putting a lateral pressure
thereon in the manner explained.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Nahum Salamon in the Great Scal Patent Office
on the 4th September 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, NAHUM
SALAMON, of Ludgate Hill, in the City of London, Sewing Machine
Factor, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of March, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
cighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Nahum Salamon, Her special licence
that I, the said Nahum Salamon, my executors, administrators, and
assigns, or such others as I, the said Nahum Salamon, my executors, ad-
ministrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN SEWING
MACHINES, PART OF WHICH IMPROVEMENTS IS APPLICABLE TO THE DRIVING OF OTHER
MACHINERY," being a communication to me from abroad by Henry
Lippman and William Lind, both of Hamburgh, North Germany, upon

page_text: :
the condition (amongst others) that I, the said Nahum Salamon, my
executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the
Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Nahum Salamon, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement, reference being had to the Drawing hereunto
annexed and to the letters and figures marked thereon (that is to
say):-
This Invention relates, firstly, to improvements on the sewing machine
Patented by William Taylor, August Twentieth, One thousand eight 1
hundred and sixty-six, No. 2136; and secondly, to an improved friction
gear applicable to sewing machines generally and also to other
machinery.
+
.
The shuttle in the Taylor machine moves in an elliptical path, and its
carrier is forked so as to embrace it near the nose and the rear. It is 2
retained in the carrier by means of a small spring bolt which passes up
behind the back end of the shuttle, but when the shuttle is required to
be released this bolt is drawn down clear of the shuttle.
As an improvement upon this mode of retaining the shuttle the carrier
is formed with a fixed stop piece which stands in rear of the shuttle,
and the shuttle near its nose is recessed to receive the end of a tipping
piece or spring stop carried by a spindle which has its bearings in lugs
on the back of the carrier.
In the accompanying Drawing, Fig. 1 shews in side elevation so much
of a sewing machine as will serve to illustrate the first improvement;
Fig. 2 is a front elevation of the machine; and Fig. 3 is a partial plan
view of the same, the cloth table being removed.
A is the shuttle carrier having a fixed stop a which stands in rear of
the shuttle B; b is the tipping piece mounted on the spindle c which is

page_text: free to rock in bearings at the back of the carrier, and is fitted with a
coiled spring d for keeping the nose of the tipping piece in a recess
formed in the nose of the shuttle for the purpose of retaining it in
position. The shuttle carrier is jointed to a lever C which rocks on a
crank pin secured to a disc D on the end of the cam shaft E. The
lower end of this rock lever C is jointed to a radius arm F which has for
its fulcrum a stud on the main framing. As therefore rotary motion is
imparted to the cam shaft the lever C will be caused to rock and give
the traverse motion to the shuttle
free to rock in bearings at the back of the carrier, and is fitted with a
coiled spring d for keeping the nose of the tipping piece in a recess
formed in the nose of the shuttle for the purpose of retaining it in
position. The shuttle carrier is jointed to a lever C which rocks on a
crank pin secured to a disc D on the end of the cam shaft E. The
lower end of this rock lever C is jointed to a radius arm F which has for
its fulcrum a stud on the main framing. As therefore rotary motion is
imparted to the cam shaft the lever C will be caused to rock and give
the traverse motion to the shuttle
To release the shuttle from its carrier it is only necessary to press on
the tail end of the tipping piece and lift its nose out of the notch in the
shuttle, the shuttle may then be instantly withdrawn.
Another improvement on the Taylor machine is to substitute for the
sliding fulcrum hitherto used for regulating the length of stitch a bowle
carried in the fork of a rock lever. This improvement is illustrated at
Fig. 1, which is a cross section taken at the line 1, 2, of Fig. 1. G is a
T shaped slide which carries the serrated feed plate H; this slide works in
guides as usual, pin-jointed to this slide is a pendent lever I against the
lower end of which bears a cam K on the cam shaft E for giving the
feed motion to the slide, while a coiled spring L serves to return the
slide to its back position. The feed plate H is raised by the cam M
acting on the lower end of the slide; N is a rock lever carried by a stud
on the framing of the machine. One end of this lever is formed as a
handle and the other end is forked to carry a bowle O which bears
against the back of the lever I. The rocking of this lever on its stud or
pivot pin will cause the bowle to act as a fulcrum against a higher or
lower portion of the lever I and thereby shorten or lengthen the traverse
motion which it will impart to the slide, and its serrated feed plate when
acted upon by the feed cam K to give the traverse motion to the feed
plate and so to the work.
As an improvement in the driving gear of sewing machines a gripping
clastic lateral pressure is employed for transmitting rotary motion from
the driving pulley. One mode of applying this improvement is by
forming an annular groove in the periphery of the driving pulley to
receive the squared edge of a compound disc which is carried by the

page_text: shaft to be driven; this compound disc will fit into the groove of the
driving pulley and bear against the sides thereof.
An illustration of this improvement is shewn at Fig. 1, and also at
Figures 5 and 6; Fig. 5 being a cross section of the compound disc fitted
to the shaft to be driven, and Fig. 6 a side view of the disc detached.
The compound disc is made in two parts P, P', which are dished to
receive between them a coiled spring Q. The part P is keyed to the
shaft to be driven, and the other part P¹ fits loosely thereon and is
capable of being adjusted laterally by means of a screw R which enters
a threaded hole in the end of the shaft and presses a washer against the
hub of the disc P¹. By turning this screw R the space for the coiled
spring Q is contracted or enlarged. The action of the enclosed spring Q
will be to force the two parts P, P¹, of the compound disc from each
other with more or less energy (according to the space afforded for its
action), and thereby to ensure the biting of the compound disc against
the sides of the groove in the driving pulley. As therefore the disc rolls
in the groove of the pulley it will if properly adjusted bite against the
sides thereof, and the liability so common to friction gear of the parts in
contact to slip will be avoided. This mode of applying clastic lateral
gripping pressure may be variously modified. For example, the compound
disc may be grooved to receive an annular projection formed on the driving
pulley, and it may be caused to nip this projection by the aid of a spring
or springs provided for the purpose. Or the driving pulley may itself
be divided and act the part of the compound disc, putting a lateral
pressure thereon in the manner explained.
Having now set forth the nature of the Invention of "Improvements
in Sewing Machines, Part of which Improvements is Applicable to the
Driving of other Machinery," and explained the manner of carrying the
same into effect, I wish it to be understood that under the above in
part recited Letters Patent I claim,-
First. The arrangement above described for facilitating the release of
the shuttle from its carrier.
The axment abozzo deseriked

page_text: Thirdly. The friction gear constructing and operating as above
described.
In witness whereof, I, the said Nahum Salamon, have hereunto
set my hand and seal, the Second day of September, in the year
of our Lord One thousand eight hundred and seventy-four.