AN IMPROVED COMBINATION OF MECHANISM FOR OPERAM AMENTO MORATE DADOS OF SEWING MACHINES " FOR OPERATING GERMAIN DAD DARS OF SWING MACHINES " PROAL SPFIC
Year: 1867

page_text: LETTERS PATENT to Joseph Stuart, of Ludgate Hill, in the City of London,
and James Henry Smith, of East Road, Hoxton, in the County of
Middlesex, for the Invention of "AN IMPROVED COMBINATION OF MECHANISM
FOR OPERAM
AMENTO MORATE DADOS OF SEWING MACHINES
"
FOR OPERATING GERMAIN DAD
DARS OF SWING MACHINES
"
PROVISIONAL SPECIFICATION left by the said Joseph Stuart and James
Henry Smith at the Office of the Commissioners of Patents, with their
Petition, on the 2nd May 1867.
We, JOSEPH STUART, of Ludgate Hill, in the City of London, and JAMES
HENRY SMITH, of East Road, Hoxton, in the County of Middlesex, do hereby
declare the nature of the said Invention for "AN IMPROVED COMBINATION OF
MECHANISM FOR OPERATING CERTAIN PARTS OF SEWING MACHINES," to be as
follows:-
This Invention relates to chain stitch or single thread machines, and consists
in the combination hereafter described for operating the hook or looper and
the feed foot from the same shaft. A longitudinal shaft carried under the
bed of the machine and driven by toothed wheels or otherwise is formed at
its front end with a crank pin or excentric in connection with the feed; the
shaft is also formed at a short distance from its end with a second excentric
in connection with the hook. The crank pin or first-named excentric is
connected to the lower end of a vertical slotted bar; the upper end of which
carries the feed foot; a screw which is adjustable to regulate the length of

page_text: feed is passed through the frame of the machine and enters the slot, thus as
the shaft revolves the crank and this screw cause the feed foot to have an up-
and-down and a to-and-fro motion, and a four-motion feed is thus produced.
The second named excentric is connected to the lower end of another slotted
bar, the upper end of which carries the hook, and a screw or pin enters the
slot of this bar, whereby the bar, and therefore the hook, receive four motions
similar to those of the feed foot.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Stuart and James Henry Smith in the Great Seal
Patent Office on the 2nd November 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOSEPH
STUART, of Ludgate Hill, in the City of London, and JAMES HENRY SMITH,
of East Road, Hoxton, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of May, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Joseph Stuart and James Henry Smith, Her special licence that
we, the said Joseph Stuart and James Henry Smith, our executors, adminis
trators, and assigns, or such others as we, the said Joseph Stuart and
James Henry Smith, our executors, administrators, 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 "AN
IMPROVED COMBINATION OF MECHANISM FOR OPERATING CERTAIN PARTS OF SEWING
MACHINES," upon the condition (amongst others) that we, the said Joseph
Stuart and James Henry Smith, or one of us, our executors or adminis-
trators, by an instrument in writing under our, or one of our, 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 immediately after the date of the
said Letters Patent.
.
NOW KNOW YE, that we, the said Joseph Stuart and James Henry Smith,
do hereby declare the nature of our said Invention, and in what manner the

page_text: same is to be performed, to be particularly described and ascertained in and
by the following: statement thereof, reference being had to the Drawings
hereunto annexed; that is to say:
.
Our Invention relates to chain stitch or single thread machines, and consists
in the combination herein-after described for operating the hook or looper and
the feed foot: from the same shaft. A longitudinal shaft carried under
the bed of the machine and driven by. toothed wheels or otherwise is formed
at its front end with a crank pin or excentric in connection with the feed; the
shaft is also formed at a short distance from its end with a second excentric
in connection with the hook. The crank pin or first-named excentric is
connected to the lower end of a vertical slotted bar, the upper end of which
carries the feed foot; a screw which is adjustable to regulate the length of
feed is passed through the frame of the machine, and enters or passes through
the slot, thus, as the shaft revolves the crank and this screw cause the feed
foot to have an up-and-down and a to-and-fro motion, and a four-motion
feed is thus produced. The second named excentric is connected to the
lower end of another slotted bar, the upper end of which carries the hook,
and a screw or pin passes through this bar, whereby this bar, and therefore
the hook, receive the necessary motions.
Our Invention will be fully understood by the accompanying Drawings.
Figure 1 is a side elevation of the front part of the machine with the box A
which encloses the working parts in section; Figures 2 and 3 are views of parts
detached.
a is the longitudinal shaft carried under the bed of the machine and driven
by toothed wheels or otherwise; 6 is a crank pin at the front end of the
shaft a; c is a slotted bar, to the lower end of which the crank pin b is connected
while its upper end carries the feed foot; d is a screw adjustable to regulate
the length of feed by means of a levere to near one end of which it is con-
nected; this lever is pivotted to a plate f fixed to the under side of the frame
by screws g, and the front end of the lever projects through the front of the
box A; the screw d passes through the slot of the bar c, and according as it
is moved by the levere so is the feed regulated. As the shaft a is caused
to revolve the crank pin 6 and screw d cause the bar c and consequently the
feed foot to have an up-and-down and a to-and-fro motion, consequently a
four-motion feed is produced. h is a second crank or excentric on the shaft a
connected to the lower end of another slotted bar i, the upper end of which carries
the hook or looper k; a screw / passes through the bar i into the portion m of
the frame, whereby the bar i and consequently the hook k receive the necessary
niotions.

page_text: And having now described the nature of our said Invention, and in what
manner the same is to be performed, we declare that we claim, the combination
of mechanism substantially as herein-before described and represented in the
annexed Drawings for operating the hook or looper and the feed foot in sewing
machines from the same shaft.
In witness whereof, I, the said Joseph Stuart for myself and on behalf
of the said James Henry Smith, have hereunto set my hand and seal,
this Thirtieth day of October, in the year of our Lord One thousand
eight hundred and sixty-seven.