Improvements in Sewing Machines!
Year: 1895

page_text: Date of Application, 8th June, 1895-Accepted, 20th July, 1895
COMPLETE SPECIFICATION:
Improvements in Sewing Machines!:
I,.GENOWEFA ADAMOWNA NIKOLAJCZUK née Jwanska, of No. 9ª Albrecht-
strasse, Berlin, in the German Empire, 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 :-
This invention relates to sewing machines, and consists of an improved type of
machine, the distinguishing feature of which lies in the means whereby motion
is imparted to the various arrangements and devices constituting the complete
sewing machine; while its superiority over machines of other constructions resides
in the fact that it enables a number of stitches to be made whilst the hand wheel is
completing one-revolution, without the assistance of any transmitting gearing, such
as gear wheels, straps and pulley or the like.
The invention will be best understood by reference to the accompanying drawings
in which;
Figure 1. is a longitudinal section of the improved machine.
Figure 2. is an elevation of the hand wheel;
Figure 3. is a plan of the devices or parts operating the shuttle; and
Figure 4. shows the cloth feeder and the parts connected therewith, as they
appear when viewed from the front.
The hand-wheel a is provided with a groove b on the side facing the machine;
such groove being arranged to describe a number of uniform curves (of which
three are shown in the drawings by way of example), but always to return into
the same circle. In this groove there engages a ball shaped projection or stud c
raised upon the double-armed lever d pivotted at e. By turning the hand wheel a
mounted upon the pivot or spindle m projecting from the rear wall of the
frame G, the lever d is set in oscillatory motion and thereby caused to reciprocate
the needle-guide rod by means of its other end which engages in a groove with
which that rod is provided. In addition to this, the stud g raised upon the bell-
crank lever pivotted at n, also engages in the groove b, while the other, rounded
off extremity h of the said lever fis in gear with the fork i of the double-armed
lever k, pivotted at 1, so that, when the hand wheel is turned, the said lever-end
imparts a lateral swinging motion to the said lever k, the opposite end of which
lever supports the shuttle s. The number of movements performed by the shuttle
and needle, at each revolution of the hand-wheel, depends upon the number of
curves described by the above-mentioned groove b, returning into the circle.
A lever p, pivotted at o, has one end of it, carrying a sliding or guide roller r,
constantly pressed by a spiral spring v against the fork i of the lever k, and receives
motion from such fork i, which, through the medium of the fork t, it transmits to
the cloth-feeder w.
The cloth-feeder, in performing its movement, by means of a spring-controlled
nose or tappet w¹ slides over a projection y rising from a plate y, capable of
adjustment by means of a screw y¹. Next to the plate y, another similar plate is
arranged, which, however, is not adjustable; and the nose w' is made sufficiently
wide to cover over both plates; by displacing the said plate y, the extent of motion
to which the nose w² is subjected, while in a raised position, may be varied, whereby
the cloth-feeder, too, is adjusted.
By giving to the hand-wheel a the form of a strap-pulley this machine may also
be made serviceable in conjunction with pedal or other motion-transmitting
gearing.

page_text: 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. A sewing machine characterised by a driving wheel a provided with an
endless groove b, consisting of a number of uniform grooves, all of which invariably
turn back to the same circle; whereby, at each revolution of the wheel a, the
needle-bar and the shuttle s, are caused to perform a corresponding number of
movements in succession..
2. In the sewing machine characterised in the first claim a cloth-feeder, carrying
a spring controlled nose w' which, as it reciprocates, slides over an adjustable
projection y, whereby it is caused to perform the feeding motion.
ليم
1
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.