Improvements in Sewing Machines.
Year: 1891

page_text: Date of Application, 14th Feb., 1891
Complete Specification Left, 18th July, 1891-Accepted, 12th Sept., 1891
PROVISIONAL SPECIFICATION.
Improvements in Sewing Machines.
I MORRIS VARCHAVKI of 43 Great Garden Street, Whitechapel in the County
of London, Engineer do hereby declare the nature of this invention to be as
follows:
My invention relates to improvements in various parts of sewing machines more
particularly with a view to adapting the machine for various kinds of work.
For this purpose I make the cloth plate capable of taking a circular form or of
being fixed in a flat position according to the class of work to be sewn.
In order that the cloth plate may assume a circular form I make the same of
several parts hinged together so that the plate as a whole may follow the outline
of the underpart of the machine which receives it. In order that it may be changed
from the circular form to the flat form I provide two supporting pieces which may
be projected from the under part of the machine being provided with rack teeth to
engage two spur wheels geared together. One of the spur wheels is provided
with a winch handle at a convenient position beneath the cloth plate and a
check wheel engaging with a pawl is provided to maintain the folding cloth
plate in the flat position when by turning the winch handle of the spur wheel the
two rack supports are projected from beneath the machine. The cloth plate may
be made to resume its circular form instantly by releasing the pawl from the check
wheel and then bearing upon the cloth plate at one side both sides falling thereby
in consequence of the simultaneous movement of both the rack supports.
For avoiding entanglement of cotton taken from the reel I apply the tension in
two ways partly upon the cotton leaving the reel and partly upon the reel itself.
For this purpose
enclose in the spindle upon which the cotton reel is placed a
coiled spring to urge a washer in contact with the reel communication with the
spring and the washer being made by a slot in the reel spindle, the tension of this
spring is regulated by a screw which confines the spring in the spindle and the
reel is retained upon the spindle by a folding projection controlled by a spring so
as to remain in its opened or closed position.
Dated this 14th day of February 1891.
AYRTON & THOMAS,
Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Sewing Machines.
1, MORRIS VARCHAVKI of 43 Great Garden Street, Whitechapel in the County
of London Engineer 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 :-
My invention relates to improvements in various parts of sewing machines more
particularly with a view to adapting the machine for various kinds of work as
shown by the accompanying drawings in all the figures of which the same part is
indicated by like reference letters.
Figure 1 is a side elevation of the machine showing the cloth plate fixed in a
horizontal position.
Figure 2 is an end view of Figure 1.
Figure 3 is a side elevation of part of Figure 1 showing the cloth plate bent
down in circular form.

page_text: I make the cloth plate A capable of taking a circular form or of being fixed in
a flat position according to the class of work to be sewn.
In order that the cloth plate may assume a circular form I make the same of
several parts hinged together so that the plate as a whole may follow the outline
of the under part of the machine which receives it. In order that it may be
changed from the circular form to the flat form I provide two supporting pieces BB₁
which may be projected from the under part of the machine being provided with
rack teeth to engage two spur wheels C C' geared together. The spur wheel C¹
is provided with a winch handle D at a convenient position beneath the cloth plate A
and a check wheel E engaging with a pawl F is provided to maintain the folding
cloth plate A in the flat position when by turning the winch handle D of the spur
wheel C the two rack supports B B are projected from beneath the machine.
The cloth plate A may be made to resume its circular form instantly by releasing
the pawl F from the check wheel E and then bearing upon the cloth plate A at one
side, both sides falling thereby in consequence of the simultaneous movement of
both the rack supports.
To avoid entanglement of cotton taken from the reel I apply the tension in two
ways partly upon the cotton leaving the reel by means of ordinary tension discs and
partly upon the reel itself. For this latter purpose I enclose in the spindle G upon
which the cotton reel is placed, a coiled spring H to urge a washer J in contact with
the reel, communication with the spring H and the washer J being made by a slot in
the reel spindle G. The tension of the spring H is regulated by a screw K which
confines the spring in the spindle and the reel is retained upon the spindle by a
folding projection L controlled by a spring so as to remain in its opened or closed
position.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a sewing machine the formation of the cloth plate in parts hinged together
for regulating the curvature of its surface substantially as described.
2. In a sewing machine mechanism for supporting a cloth plate at various degrees
of curvature consisting of two supporting bars operated by spur wheels and detained
by a ratchet wheel and pawl substantially as described.
3. In a sewing machine a spindle for carrying the cotton reel provided with a
latch for retaining the reel and a washer urged by a spring making frictional
contact with the reel to produce a tension upon the sewing cotton substantially as
described.
Dated this 18th day of July 1891.
AYRTON & THOMAS,
Agents for the Applicant.