AN IMPROVED CONSTRUCTION OR ARRANGEMENT OF SEWING MACHINE
Year: 1883

page_text: LETTERS PATENT to Thomas James Denne of Templeton Villa Selhurst in
the county of Surrey for an Invention of AN IMPROVED CONSTRUCTION OR
ARRANGEMENT OF SEWING MACHINE
PROVISIONAL SPECIFICATION left by the said Thomas James Denne at the
Office of the Commissioners of Patents on the 15th November 1883.
THOMAS JAMES DENNE of Templeton Villa Selhurst in the county of Surrey
AN IMPROVED CONSTRUCTION OR ARRANGEMENT OF SEWING MACHINE
The object of this invention is a new or improved construction or arrangement
of sewing machine by which much heavier material such as leather can be sewn as
well as those of a light character such as calico, muslins etc
According to my invention I form the base plate with an upright pillar from
which an arm carrying the head is cast as part of same, said pillar has shields
for the pinions by which the upper and lower shafts are driven through the
intermediate wheel to which the hand fly or band wheel is attached.
The lower shaft whose fore end passes through a lump or projection of the base
plate has on its extreme end a cam disc for a lip of the feed appliance to bear
against under the control of an adjusting screw pin to determine the length of
stitch. This lip is pivotted loosely to the outside of the shuttle box and its
opposite end is connected by a link to a rock lever having jaws which grip a rim
of the feed wheel for its onward motion and to slip from said rim under the action
of springs provided for the purpose the feed wheel being otherwise held securely
by a segmental spring plate whose bite can be regulated by a screw pin which
passes through a leg attached to the front plate. The shuttle box is affixed to the
front plate and its back has a slot in which the pin of a lever can travel to and
fro to actuate the shuttle the pin being connected by a link to the feed cam disc
behind the front plate.
The upper shaft carries at its front end the heart or other shaped needle bar
actuater, the back of which has a cam for operating upon a vibrating arm bung
from the upper part of the pillar, said vibrating arm being- provided with an
adjustable leg within a socket in which it can be nipped by a screw pin and be so

page_text: set that the presser foot (preferably a wheel) can be lifted automatically from
contact with the fabric at the completion of each stitch and when the feed has to
push the work forward.
The needle bar has a projection on which the leg can rest and the leg can be
raised or lowered to suit the solidity or spongyness and also the thickness or
number of plys of the fabric being sewn.
The shuttle carrier is supported by a rail one end of which is attached to an
angled bracket projecting from the shuttle box.
The usual appliances are employed for producing the necessary tension on the
upper thread and also for releasing the presser such as when the fabric has to be
released or fresh fabric put on the work plate

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas James Denne in the Patent Office on the 15th May 1884.
THOMAS JAMES DENNE of Templeton Villa Selhurst in the county of Surrey
AN IMPROVED CONSTRUCTION OR ARRANGEMENT OF SEWING MACHINE
The object of this invention is a new or improved construction or arrangement
of sewing machine by which much heavier material such as leather can be sewn
as well as those of a light character such as calico muslins etc.
According to my invention I form the base plate A with an upright pillar B
from which an arm C carrying the head D is cast as part of same, said pillar B has
shields E E for the pinions by which the upper and lower shafts F. G. are driven
through the intermediate wheel to which the hand, fly or band wheel A is
attached.
The lower shaft G whose fore end passes through a lump or projection I of the
base plate A has on its extreme end a cam disc J for a lip J¹ of the feed appliance
lever K to bear against under the control of an adjusting screw pin K¹ to determine
the length of the stitch. This lip J¹ is pivotted loosely to the outside of the
shuttle box L and its opposite end is connected by a link M to a rock lever N
having jaws P P which grip a rim of the feed wheel P¹ for its outward motion and
to slip from said rim under the action of springs QQ provided for the purpose
the feed wheel P¹ being otherwise held securely by a segmental spring plate R
whose bite can be regulated by a screw pin S which passes through a leg attached
to the front plate L. The shuttle box L is affixed to the front plate L¹ and its
back has a slot in which the pin of a lever U can travel to and fro to actuate the
shuttle the pin being connected by a link U¹ to the cam disc J behind the front
plate.
The upper shaft F carries at its front end the heart or other shaped needle bar
actuater V the back of which has a cam W for operating upon a vibrating arm X
hung from the upper part of the pillar B said vibrating arm being provided with
an adjustable leg Y within a socket in which it can be nipped by a screw pin Z
and be so set that the presser foot (preferably a wheel Z¹) can be lifted automatically
from contact with the fabric at the completion of each stitch and when the feed
has to push the work forward.
The needle bar has a projection a on which the leg b can rest and the leg can
be raised or lowered to suit the solidity or spongyness and also the thickness or
number of plys of the fabric being sewn.
The shuttle carrier is supported by a rail one end of which is attached to an
angled bracket projecting from the shuttle box.
The usual appliances are employed for producing the necessary tension on the
upper thread and also for releasing the presser such as when the fabric has to be
released or fresh fabric put on the work plate.
Having now described the nature of my said invention and in what manner the
same is to be performed I declare that I claim
The particular arrangement of parts or mechanism constituting a sewing
machine, the whole constructed as hereinbefore described and as shown in the
annexed drawings.
In witness whereof I the said Thomas James Denne have hereunto set my hand
and seal this fourteenth day of May in the year of our Lord One thousand eight
hundred and eighty four