Year: 1886

page_text: Date of Application, 9th Oct., 1886.
Complete Left, 13th May, 1887.
Complete Accepted, 21st June, 1887.
I, WALTER BEECROFT of Swinegate, Leeds in the County of York, Mechanical
Engineer do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in various parts of sewing machines, such
improvements being applicable to "chain stitch" and other types of machines.
My improvements have reference to means employed for imparting the required
tension to the thread. The required motion is obtained for this purpose by preference
from the needle lever. On this lever I provide a lip or projection having therein a
set or regulating screw, and on the head of the machine I mount a bell crank lever
in suitable bearings. An adjustable radial reciprocating movement is imparted to
such bell crank lever from the lip or projection on the needle lever, such movement
being varied at pleasure by the set or regulating screw.
The upper end of the bell crank lever engages with a horizontal rod mounted so as
to slide freely in bearings provided on the head of the machine.
At the outer end of this rod is attached a disc and between it and a fixed disc
concentric therewith is passed the thread.
By moving the herein before mentioned rod horizontally the disc thereon is moved to
or from the fixed disc. When the discs are brought together the thread is firmly
held between them, and when separated such thread is free to pass.
With reference to the take-up arrangement for taking up the slack thread as the
needle bar descends. The motion required for this movement is imparted thereto from
the bottom rotating or driving shaft. In suitable bearings on the head of the machine
I mount a vertical shaft, the lower end thereof having a projecting arm which engages
in a cam on the aforesaid driving shaft, and by such means an intermittent radial
reciprocating movement is imparted to such shaft. At the upper end of this vertical
shaft is provided a light arm, hooked or otherwise prepared at its outer end for the
passage through of the thread, operating in such a manner that as the light arm moves
in one direction it draws the thread with it, and when moving in the opposite direction,
slackens the thread.

page_text: In reference to pulling off or drawing thread from the bobbin, for this purpose I
employ a light projecting hook or eye attached to the needle lever. The thread is
passed round or through the hook or eye and as the needle lever descends the hook or
eye also descends pulling the required quantity of thread from the reel. During this
movement the tension discs are closed on the thread thus preventing the pull off taking
other thread than that from the reel.
The connecting joint between the needle lever and needle bar is formed by providing
an adjustable collar on the needle bar on which is formed a projecting ball which con-
nects the needle lever by being inserted into a bearing at end of such lever. Through
this ball and collar is passed a set screw whereby the collar can be fixed in any suitable
position on the needle bar, at the same time the ball allows of a free radial movement of
the needle lever.
My improvements have further reference to a positive feed motion, the movement
for this purpose is obtained from the driving shaft.
In suitable bearings on the base of the machine I mount a rocking shaft at one end
of which projecting arm or arms are provided for receiving the feed bar on which is
mounted the feeder.
The feed bar has an upward movement imparted thereto by means of an eccentric
at the end of the driving shaft, through suitable connecting rod.
At the point where the connecting rod is coupled to the feed bar I provide a slot
hole through which the screw passes which connects them together so that the feed bar
can be raised or lowered when required.
The forward movement of the feed is obtained by an eccentric on the driving shaft,
such eccentric actuating a rocking shaft by means of a connecting rod coupled to a
lever or projecting arm on rocking shaft.
The position of the connecting rod where it is coupled to the arm may be varied
by means of a slot hole in such arm. This adjustment being for the purpose of
regulating the stroke of the feed.
Dated thi: 0th dor of Natalin 1906
J. W. HARDING,
Agent.

page_text: I, WALTER BEECROFT of Swinegate, Leeds in the County of York, Mechanical
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, such
improvements being applicable to "Chain Stitch" and other types of machines.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a front elevation. Fig. 2 is an end elevation, and Fig. 3 is a plan looking
on the top, shewing my improvements in sewing machines.
My improvements have reference to means employed for imparting the required
tension to the thread. The required motion is obtained for this purpose by preference
from the needle lever A. On this lever A I provide a lip or projection B having
therein a set screw C, and on the head of the machine I mount a bell crank lever D
in suitable bearings E. An adjustable radial reciprocating movement is imparted to
such bell crank lever D from the lip or projection B on the needle lever A, such
movement being varied at pleasure by the set or regulating screw C.
The upper end of the bell crank lever D engages with a horizontal rod F provided
with the spring G, mounted so as to slide freely in bearings H provided on the head
of the machine.
At the outer end of this rod F is attached a disc I and between it and a fixed disc K
concentric therewith is passed the thread.
By moving the hereinbefore mentioned rod F horizontally the dise I thereon is
moved to or from the fixed disc K. When the discs are brought together the thread
is firmly held between them, and when separated such thread is free to pass.
With reference to the take up arrangement for taking up the slack thread as the
needle bar L ascends. The motion required for this movement is imparted thereto
from the bottom rotating or driving shaft M. In suitable bearings N on the head of
the machine I mount a vertical shaft O, the lower end thereof having a projecting
arm P which engages in a cam R on the aforesaid driving shaft M, and by such means
an intermittent radial reciprocating movement is imparted to such shaft O. At the
upper end of this vertical shaft O is provided a light arm S, hooked or otherwise pre-
pared at its outer end for the passage through of the thread, operating in such a manner
that as the light arm moves in one direction it draws the thread with it, and when
moving in the opposite direction slackens the thread.
In reference to pulling off or drawing thread from the bobbin. For this purpose I
employ a light projecting hook or eye T attached to the needle lever A. The thread is
passed round or through the hook or eye T, and as the needle lever A descends the hook.
or eye
T also descends pulling the required quantity of thread from the reel. During

page_text: this movement the tension discs 1 and K are closed on the thread, thus preventing the
pull off taking other thread than from the reel.
The connecting joint between the needle lever A and the needle bar L is formed by
providing an adjustable collar V on the needle bar L on which is formed a projecting
ball W which connects the needle lever by being inserted into a bearing X at end of
such lever. Through this ball W and collar V is passed a set screw Z whereby the
collar can be fixed in any suitable position on the needle bar L, at the same time the
ball W allows of a free radial movement of the needle lever A.
My improvements have reference also to a positive feed motion, the movement for
this is obtained from the driving shaft M.
In suitable bearings 1 on the base of the machine I mount a rocking shaft 2, at one
end of which projecting arın or arms 3 are provided for receiving the feed bar 4 on
which is mounted the feeder 5 of ordinary form. The feed bar 4 has an upward move-
ment imparted thereto by means of an eccentric 6 at the end of the driving shaft M
through suitable connecting rod 7.
At the point where the connecting rod 7 is coupled to the feed bar I provide a slot
hole 8 through which the screw 9 passes which connects them together, so that the
feed bar 4 can be raised or lowered when required. The forward movement of the
feed is obtained by an eccentric 10 on the driving shaft M, such eccentric 10 actuating
the rocking shaft 2. The position of the connecting rod 11 where it is coupled to the
arm 12 may be varied by means of the slot hole 13 and bolt 14. The adjustment being
for the purpose of regulating the stroke of the feed.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is
1st. The combination of needle lever A, lip or projection B with its set screw C, bell
crank lever D in bearings E, horizontal rod F provided with spring G and bearings H,
also discs I and K, for imparting the required tension to the thread, all arranged and
operating substantially as herein set forth.
2nd. The combination of the rotating or driving shaft M in suitable bearings also
shaft O in bearings N with its projecting arm P engaging into a cam R on the driving
shaft M, also the light arm S, for taking up the slack thread as the needle bar L
ascends, all arranged and operating substantially as herein set forth.
3rd. The application of projecting hook or eye T attached to the needle lever A, for
pulling off or drawing the thread from the bobbin, arranged and operating substantially
as herein set forth.
4th. The application of set screw Z through ball W and collar V, for securing the
same to the needle bar L, substantially as and for purposes herein set forth.
5. The combination of bearings 1, rocking shaft 2, projecting arm or arms 3, feed
bar 4, feeder 5, eccentric 6, connecting rod 7 with its slot hole 8 and screw 9,
eccentric 10 on driving shaft M, connecting rod 11, arm 12, slot hole 13 and bolt 14,
for imparting a positive feed motion, all arranged and operating substantially as herein
set forth.
Tath 12th dor of M. 1987