Improvements in Sewing Machines.
Year: 1894

page_text: Date of Application, 28th July, 1894
Complete Specification Left, 27th Aug., 1894-Accepted, 3rd Nov.,
1894
Improvements in Sewing Machines.
We, ISIDOR NASCH, and WILLIAM NASCH, both of 251 Whitechapel Road,
London, E. Engineers, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in sewing machines, and has for object to
adapt the present ordinary type of sewing machine, whether chain stitch or lock
stitch, to the purpose of sewing or stitching pamphlets and the like.
In accordance with this invention we are enabled to produce a stitching not
hitherto attainable by machines employed for sewing pamphlets; that is to say, by
and through these our improvements, we obtain a set of four stitches, the first and
For
last of which are preferably much shorter than the two intermediate ones.
convenience in operation, and as preferred in pamphlet stitching, the said first and
last stitches are from inch to inch long, and the second and third stitches from
1 inch to 1 inches in length. Said stitching may be produced from either a
single or double thread machine, and be consequently either chain stitch or lock
stitch according to the type of machine with which the sewing is effected. For
the purpose of cutting off the thread at the completion of the fourth stitch we have
a knife or cutting device so arranged as to act automatically as required.
Now, according to this invention, we provide a sliding clamp with a hinged jaw
which we place upon the bed plate of the machine, in which clamp is inserted the
pamphlet or the like to be stitched. The sliding clamp is caused to travel across
the machine (and so feed the pamphlet) by means of a crank and levers actuated
from a cam fixed upon the gear wheel shaft or stud. Said cam is so constructed
as to give a properly timed and spaced travel or motion to the sliding clamp to
allow of the needle descending and forming the stitches at the stated intervals
mentioned above. Instead of using an ordinary stitch plate we form the clamp
with a slot of the required length of the series of stitches so as to answer the
purpose.
Upon the underside of the bed plate of the machine we place the knife or
cutting device for dividing the thread at the end of each series of four stitches.
Said knife or blade for severing the thread we preferably affix to the end of a lever
or arm provided (suitably fulcrummed and worked from a cam) which knife or
blade is forced against the thread near the looper or shuttle, as the case may be,
and severs same, when the sliding clamp arrives at the end of its stroke.
We may also employ a nipping finger or pincer for the purpose of gripping the
thread near the eye of the needle at the completion of the last stitch of the series
and holding same whilst the thread is cut and until the second stitch of the next
series is formed when the thread is released and the nipping finger or pincer awaits
the completion of the last stitch of that series when it again comes into operation,
and so on.
Said nipping finger or pincer may conveniently be attached to the arm
or face of the machine and be worked or operated by any suitable means, say by a
lever or arm actuated by a cam, or otherwise, as may be found desirable or
convenient.
Or, in lieu of the nipping finger or pincer aforesaid we may make use of a presser
foot actuated by a suitably fulcrummed lever from a cam provided, all so arranged
that said presser foot is raised as the feed takes place, and presses upon the work
at each stitch.
We have also a special thread controlling device consisting of a lever fulcrummed
to the arm of the machine and actuated from a peculiarly constructed cam by which

page_text: different strokes are given to said thread controlling arm or lever in such manner as
to regulate the supply of the thread according to the different sizes of stitch being
made (whether short or long). In combination with this fulcrummed lever and
cam we have an automatically acting thread tightening device which comes
into operation at the end of the series of stitches so as to tighten the thread when
the cutting knife comes into operation and allow of a clean cutting of the thread.
This thread tightening device may conveniently consist of a vertical arm pivotted
to the head of the machine the lower end of which arm may be in connection with
a tension through which the thread passes after passing through an eye or loop
formed at the front end of the thread controlling lever aforesaid. From said
tension the thread passes upwards through a loop formed on the top of the needle
bar and thence through suitable guides to the eye of the needle. A stud is carried
upon the thread controlling lever or arm which as said lever or arm is raised at the
end of each series of stitches presses against the upper end of the vertical arm of
the thread tightening device, and, this arm as aforesaid being suitably pivotted, its
lower end is forced outwards, and thereby puts a tension upon the thread allowing
it to be held tightly whilst the knife is performing the cutting operation.
For throwing the machine out of gear at the end of the stitching and during the
return of the sliding clamp to its first position we make use of suitable connecting
and disconnecting gearing, and whilst said return motion is being performed the
jaw of the clamp is opened by means of suitable arms and levers worked from a
cam upon the gear wheel shaft or stud, and held so opened sufficiently long to allow
of the stitched pamphlet therein being removed, and another pamphlet being
inserted, when it is closed, the machine again thrown into gear, and the sewing
renewed. With machines provided with reciprocating needle heads, such as button
hole sewing machines, we are enabled to obtain an overcast stitching, which gives a
stronger stitch and a firmer sewing, and we then form the stitch slot in the clamp
(used as aforesaid instead of the stitch plate) with suitable extensions at right angles
therewith to allow of the passage therethrough of the needle as required, and so
construct the cam actuating the sliding clamp (or pamphlet feeder) that said
pamphlet is held stationary whilst the needle is "overcasting," hence the overcast
stitch may be formed at absolutely right angles to the line of ordinary stitching.
The two end overcast stitches may then be utilized as the first and last short
stitches previously alluded to.
Dated this 26th day of July 1894.
ISIDOR NASCH.
WILLIAM NASCH.
COMPLETE SPECIFICATION.
Improvements in Sewing Machines.
We, ISIDOR NASCH, and WILLIAM NASCH, both of 251 Whitechapel Road,
London, E., Engineers, 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 improvements in sewing machines, and has for object to
adapt the present ordinary type of sewing machine, whether chain stitch or lock
stitch, to the purpose of sewing or stitching pamphlets and the like.
For
In accordance with this invention we are enabled to produce a stitching not
hitherto attainable by machines employed for sewing pamphlets; that is to say, by
and through these our improvements we obtain sets of four stitches, the first and
last of which are preferably much shorter than the two intermediate ones.
convenience in operation, and as preferred in pamphlet stitching the said first and
last stitches are from in. to in. long, and the second and third stitches from
1 inch to 1 inches in length. Said stitching may be produced from either a single

page_text: or double thread machine, and be consequently either chain stitch or lock stitch,
according to the type of machine with which the sewing is effected. For the
purpose of cutting off the thread at the completion of the fourth stitch we have a
knife or cutting device so arranged as to act automatically as required.
Now, according to this invention, we provide a sliding clamp with a hinged jaw
which we place upon the bed plate of the machine, in which clamp is inserted the
pamphlet or the like to be stitched. The sliding clamp is caused to travel across
the machine (and so feed the pamphlet) by means of a crank and levers actuated
from a cam fixed upon the gear wheel shaft or stud. Said cam is so constructed as
to give a properly timed and spaced travel or motion to the sliding clamp to allow
of the needle descending and forming the stitches at the stated intervals above
mentioned. Instead of using an ordinary stitch plate we form the clamp with a
slot of the required length of the series of stitches, so as to answer the purpose.
Upon the underside of the bed plate of the machine we place the knife or cutting
device for dividing the thread at the end of each series of four stitches. Said knife
or blade for severing the thread we preferably affix to the end of a lever or arm
provided (suitably fulcrummed and worked from a cam) which knife or blade is
forced against the thread near the looper or shuttle (as the case may be) and
severs same, when the sliding clamp arrives at the end of its stroke. We may also
employ a pincer or gripping device for the purpose of gripping the thread near the
eye of the needle at the completion of the last stitch of the series and holding same
whilst the thread is cut and until the second stitch of the next series is formed,
when the thread is released and the pincer awaits the completion of the last stitch
of that series, when it again comes into operation, and so on. Said pincer or
gripping device may conveniently be attached to the arm or face of the machine
and be worked or operated by any suitable means, say by a lever or arm actuated
by a cam, or otherwise, as may be found desirable or convenient. For throwing
the machine out of gear at the end of the stitching and during the return of
the sliding clamp to its first position we make use of suitable connecting and
disconnecting gearing, and whilst said return motion is being performed the jaw
of the clamp is opened by means of suitable arms and levers worked from a cam
upon the gear wheel shaft or stud, and held so opened sufficiently long to allow
of the stitched pamphlet therein being removed, and another pamphlet. being
inserted, it is then closed, the machine again thrown into gear, and the sewing
renewed.
With machines provided with reciprocating needle heads, such as button hole
sewing machines, we are enabled to obtain an overcast stitching, and we then
form the stitch slot in the clamp with suitable extensions at right angles therewith
to allow of the passage therethrough of the needle as required, and so construct
the cam actuating the sliding clamp (or pamphlet feeder) that said pamphlet is
held stationary whilst the needle is "overcasting," hence the overcast stitch may
be formed at absolutely right angles to the line of ordinary stitching.
The two
end overcast stitches may then be utilized as the first and last short stitches
previously alluded to.
In lieu of the pincer or gripping device above mentioned we may make use
of a presser foot actuated by a suitably fulcrummed lever from a cam provided,
all so arranged that said presser foot is raised as the feed takes place, and
presses upon the work at each stitch.
We have also a "take up" or thread controlling device consisting of a lever
fulcrummed to the arm of the machine and actuated from a peculiarly constructed
cam by which different strokes are given to the thread controlling arm or lever in
such manner as to regulate the supply of the thread according to the different sizes
of the stitch being made (whether the shorter or the longer). In combination with
this fulcrummed lever and cam we have an automatically acting thread tightening
device which comes into operation at the end of the series of stitches so as to
tighten the thread when the cutting knife comes into operation, and allow of a
clean cutting of the thread. This thread tightening device may conveniently

page_text: consist of a vertical arm pivotted to the head of the machine, the lower end of
which arm may be in connection with a tension through which the thread passes
after passing through an eye or loop formed at the front end of the thread
controlling lever aforesaid. From this tension the thread passes upwards through
a loop formed on the top of the needle bar and thence through suitable guides to
the eye of the needle.
A stud is formed upon the thread controlling lever or arm which, as said lever
or arm is raised at the end of each series of stitches, presses against the upper end
of the vertical arm of the thread tightening device, and this arm, as aforesaid,
being suitably pivotted its lower end is forced outwards and thereby puts a tension
upon the thread, allowing it to be held tightly whilst the knife is performing the
cutting operation.
And in order that this our invention may be fully understood we have appended
hereto four sheets of drawings illustrative of our improvements, the following
being a description thereof :-
Fig. 1 is a side elevation, partly in section, of a single thread sewing machine,
constructed in accordance with this invention.
Fig. 2 is a front elevational view of the sliding hinged clamp and its opening, or
raising, mechanism; and Fig. 3 is a similar view of the clamp but in which the cam,
crank, and lever, by which is obtained its travel across the machine, are particularly
illustrated.
Figs. 4 and 5 are respectively front elevational and plan views of the thread
cutting knife and its actuating mechanism (shewn also in side elevation in Fig. 1).
Fig. 6 is a front elevational view of the thread gripping device applied to the
sewing machine; Fig. 7 is a side elevational view of its actuating mechanism;
Fig. 8 a plan of its actuating cam and portion of the pivotted arin or lever for
bringing the thread gripping device in, and out of, action; and Fig. 9 shews the
gripping device separately in elevational view.
с
Referring particularly to Figs. 1. 2. and 3, a is the sliding clamp which has a
travel across the machine and in which the pamphlet to be sewn is inserted. This
clamp a has its upper jaw hinged to the lower one at a¹ to permit of its being
opened for the reception of the pamphlet, and to permit of said pamphlet being
withdrawn when sewn. This opening of the clamp a is effected automatically by
means of the arm or lever pivotted at b₁ to the machine, and provided with an
extension c taking under the projection d formed on the upper jaw of the clamp a.
The raising and lowering of the end c is effected by means of the lever e acting
upon a pin or extension c¹ on the opposite end of the lever . The lever e is
fulcrummed at f to a suitable bracket or framing g (Fig. 1.) provided on the
machine, and has a roller or pin (e' and e) at each end. The one e' acting upon
the extension c¹ on lever b and the other resting upon the rim cam carried
wheel stud i.
gear
As the cam h revolves and takes the position shewn
upon the
in dotted lines Fig. 2 it raises the end e² of the lever e and causes the end c' of the
lever b to be depressed, which raises the end c of lever and consequently lifts
the upper jaw of the clamp a all as shewn in dotted lines Fig. 2.
To obtain the horizontal travel of the clamp a we have the cam k, see Fig. 3,
fitted upon the gear wheel stud i, which acts upon a roller attached to end of
lever which latter is fulcrummed at 12. The lower end of the lever works in a
loop m formed upon one end of the lever m, see also Fig. 1. This lever m is
fulcrummed at m² to the underside of bed of machine, and at end m³ is connected
to the crank n, which latter is attached at n' to the underside of clamp a, and as
the cam k is revolved the clamp a is taken into the position shewn in dotted lines
Fig. 3 and hack again to its first position, the needle descending and stitching the
pamphlet as aforesaid. Referring now to the cutting device and its mechanism
illustrated particularly in Figs. 4 and 5, o is the knife or cutter affixed to one end
of the lever p (see also Fig. 1). Lever p is fulcrummed at. pl to the underside of
machine and is formed with a loop at its end p into which takes the end q' of the
lever which latter is fulcrummed at 9' to a suitable bracket provided upon the

page_text: machine, and at its upper end carries the roller q which is acted upon by the rim
cam r. As cam revolves it acts upon lever g and, through it, lever >> in such
manner as to cause the knife o to advance and retire as exemplified particularly
in Fig. 5 in which the two positions of the knife o are shewn. A springs attached
at one end to the lever p and at the other to a suitable position under the bed of
the machine acts against the cam and ensures the proper action of the cutting
blade o.
To throw the machine into, and out of, gear we have (see Fig. 1) the pivotted
levert (pivotted to cheeks t¹ formed on collar t² fixed upon driving shaft) taking
with one end into a notch or slot formed in the revolving disc u carried upon a
loose sleeve upon driving shaft and acted upon at other end by the lever u¹ operated
from cam fixed upon gear wheel stud. When the stitching is completed
lever acts upon levert and raises same out of the notch or slot in disc u and
the stitching mechanism is disconnected until levert again enters slot in disc u.
To hold the thread firmly at end of the stitching whilst the knife is cutting same,
and whilst the first two stitches of the series are being made we have the gripping
device and mechanism shewn particularly in Figs. 6, 7, 8, and 9. The gripping
device consists essentially of two limbs vv jointed at vi and hinged at v² to face of
machine. A spring placed between the limbs above the joint v¹ tends to keep
the gripping device closed. To open same the rod w is caused to descend between
the cheeks v formed upon the gripping device v. This operation is performed by
means of the lever and cam y. Cam y acts upon a roller al carried upon end of
lever and this latter being fulcrummed at 2 upon top of machine will, as end &¹
is raised and lowered, correspondingly depress or raise the end .e (Fig. 7) and with
it the rod to. The inside of the cheeks of of gripping device are so shaped that as
the rod w descends between them it opens them, and also forces the device back
from its normal vertical position, as seen in Fig. 6. When the rod w is raised free
of the cheeks of the gripping device the spring 2 at back of same returns it to its
normal position as shewn in dotted lines.
In lieu of the device for gripping the thread just described we may employ a
presser foot and affix same to lower end of rod w; and the fulcrummed lever a and
cam y will equally serve to operate said presser foot and raise it as the feed takes
place and lower it at each stitch.
We have further the "take up" or thread controlling device and thread tightener
before mentioned. These and the methods of operating same are illustrated
particularly in Fig. 1.
The thread controlling lever 1 is fulcrummed at 2 to the arm of the machine.
At the front end of this lever we have an eye 3 through which the thread is passed
on its passage from the bobbin to the needle. A lever 4 fulcrummed upon stud or
pin fon bracket g takes into a slot formed at rear end of lever 1. The other end
of fulcrummed lever 4 is provided with a roller 5 which is operated by the cam 6
which is so constructed that different strokes are imparted to the lever 1 in such
manner as to regulate the supply of thread according to the different lengths of
the stitches being made. The automatically acting thread tightening device
employed in combination with the thread controlling mechanism just described, and
which tightens the thread when the cutting knife comes into operation, consists
of the vertical arm 7 pivotted at 8 to the head of the machine. The lower end of
this arm 7 acts upon the tension spring 9. A stud 10 is formed upon the thread
controlling arm I which, as said arm is raised at the end of each series of stitches,
presses against the upper end of the vertical arm 7 and thereby forces outwards the
lower end of said arm compressing the tension spring 9 and holding the thread
tightly in the tension 11 whilst the knife is performing the cutting operation.
The presser foot or gripping device actuating lever x may be formed as shewn in
Figs. 6, 7, and 8, with a curved extension acted upon by the cam, or as shewn in
Fig. 1 the lever x may be operated by a separate lever 12 fulcummed upon stud
or pin and actuated by the cam y.

page_text: The driving wheel A, pinion C, and disc u, are carried upon a sleeve B fitted
loosely upon the main shaft of machine.
The needle and looper or shuttle as the case may be are operated in the usual
manner. The pinion C gears with the toothed wheel D fitted upon the gear
wheel stud i aforesaid and from this gearing the various cams receive their
motion.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed we declare that what we
claim is :-
1. The improvements in sewing machines, substantially as and for the purposes
herein before described and shewn.
2. In sewing machines the hinged clamp a and its actuating mechanism;
substantially as and for the purposes, herein before described and shewn particularly
in Figs. 1, 2, and 3, of the accompanying drawings.
3. In sewing machines the combination of thread cutting knife and its actuating
mechanism with the pamphlet feeding travelling hinged clamp; substantially as
herein before described and illustrated in the drawings.
4. In sewing machines the thread gripping device substantially as herein
described and shewn in Figs. 6, 7, 8, and 9, of the accompanying drawings.
5. In sewing machines the combination of pamphlet feeding travelling hinged
clamp and thread cutting knife with the thread controlling mechanism and thread
tightening device; substantially as herein before described and illustrated in the
accompanying drawings.
Dated this 23rd dar of Angust 1894
ISIDOR NASCH.
WILLIAM NASCH.