Year: 1888

page_text: We CARL WALDECKER of Köln, Merchant, and MAX SANDT of Bielefeld, Germany,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
Our invention of improvements in sewing machines relates to the manner of
driving the needle arm, and the shuttle arm, and also to the thread feed motion; and
consists of the frame a to which the driving wheel b is fastened, and the two arms c
&d; to the arm c is fastened the link e for the thread feeder; under the plate w.is
placed the shuttle carrier p which is operated by the rod m.
Reference being had to the accompanying drawings which form part of this
specification; similar letters denote similar parts throughout the different figures.
Fig. 1 is a side view of this improved sewing machine, showing the shuttle and
feed motion.
Fig. 2 is an end view of the same.
Fig. 3 is an upper sectional view of the machine through the line A B, Fig. I with
the plate w away, to permit of the working parts being seen.
Fig. 4 shows a side view of the lower half of the machine, showing how the shuttle
is removed fig. 5 is a view of the face of the driving cam b.
Fig. 6 & 7 show the arrangement of moving the cloth feeder.
Fig. 8 shows a view of the shuttle holder plate.
The construction and working of the machine is as follows:
On the arm a of the machine is the stud fastened, on which the driving cam b
revolves; and the two levers c & d which are connected together by the shaft z.
The needle bar h, which slids up and down in the arm a is connected to the end of
the lever c by the small link e which also serves as thread feeder.
S,
Under the plate w is placed the mechanism for working the shuttle and
the cloth feeder, or transporter n, which is worked by the lever m from the lever d.
The shuttles is held in the shuttle holder q which is fastened to the oscillating
plate p (which oscillates round the point ) the plate p is provided with a peculiar
shaped slot p¹ (see fig. 8) in which the stud p³ (which is on the end of the lever m)
works.

page_text: The lever m has a sliding motion imparted to it from the lever d and slides on the
pin m' which is fastened to the lever t.
When it is required to withdraw the shuttle for rewinding or other cause, the
lever tis pressed back and with it the pin m' which holds the lever m up, and
the lever m having no support at the middle, falls down and the plate p falls into the
position as shown in fig. 4 when the shuttle can be easily removed.
The levers & d are moved by means of the cam wheel b which as seen from
fig. I has the shape of a wedge; the driving half 61 fig. 5 first shoves the arm c
forwards, and as soon as the largest part of the cam 6 has passed the arm c, and
the arm c in its extreme position, then the cam acts on the arm d, and shoves it
forward, but as the two arms c & d are connected together at x, so in one rovolu-
tion the arms c & d are each shoved once forward and backward.
On account of the link e, (connecting the arm c with the needle rod h), being so
formed, by every stroke of the needle rod the hole e' (through which the thread is
passed), makes a larger movement than the rod h and so draws thread from the
spool k.
The oscillating of the plate p serves at the same time to work the feed motion or
transporter n as shown in fig. 2-3, 6-7; on the plate p is fitted the spring y which
when the plate p is moved from right to left catches on the projection n' of the feed
bar n, and so moves it, but on the return stroke the spring y allows of the projection n¹
passing without imparting any motion to it. The amount of the feed bar's movement
can be regulated by means of the screw o, the bar n is drawn back by the spring u²,
after being released from the spring y.
1
1 1000

page_text: Improvements in Sewing Machines.
..
We CARL WALDECKER of Cologne Germany merchant and MAX SANDT of Bielefeld
Germany manufacturer 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:-
Our invention of improvements in sewing machines relates to the manner of driving
the needle arm and the shuttle arm, and also to the thread feed motion, and consists
of a frame to which the driving wheel is fastened, and two arms, to the one arm is
fastened a link for the thread feeder; under the face plate is placed the shuttle carrier
which is operated by a rod.
Reference being had to the drawing which was left with the provisional specification
and also to sheet 1 of the complete drawing which form part of this specification;
similar letters denote similar parts throughout the different figures.
Fig. 1 is a side view of this improved sewing machine, showing the shuttle and
feed motion.
Fig. 2 is an end view of the same.
Fig. 3 is an upper sectional view of the machine through the line A B fig. 1, with
the plate w away, to permit of the working parts being seen.
Fig. 4 shows a side view of the lower half of the machine, showing how the shuttle
is removed; fig. 5 is a view of the face of the driving cam b.
Fig. 6 & 7 show the arrangement of moving the cloth feeder.
Fig. 8 shows a view of the shuttle holder plate.
Fig. 9 shows a modification of the shuttle carrying arm and feed motion.
Fig. 10 shows a top view of fig. 9.
The construction and working of the machine is as follows:
On the arm a of the machine is the stud fastened, on which the driving
cam 6 revolves, and the two levers c and d which are connected together by the
shaft z.
The needle bar which slides up and down in the arm a is connected to the end of
the lever c by the small link e which also serves as thread feeder.
Under the plate to is placed the mechanism for working the shuttle 8, and
the cloth feeder, or transporter n, which are worked by the lever m from the
lever d.
The shuttles is held in the shuttle holder q which is fastened to the oscillating
plate p (which oscillates round the point r) the plate p is provided with a peculiar
shaped slot p' (see fig. 8) in which the stud p' (which is on the end of the lever m
works.
The lever m has a sliding motion imparted to it from the lever d and slides on the
pin m' which is fastened to the lever t.
When it is required to withdraw the shuttle for rewinding or other cause, the lever t
is pressed back and with it the pin m³ which holds the lever m up, and the lever m

page_text: having no support at the middle, falls down and the plate p falls into the position as
shown in fig. 4 when the shuttle can be easely removed.
The levers c and d are moved by means of the cam wheel b which as seen from
fig. 1 has the shape of a wedge; the driving half 6' fig. 5 first shoves the arm o
forwards and as soon as the largest part of the cam has passed the arm c and the
arm c in its extreme position, then the cam acts on the arm d and shoves it forward,
but as the two arms c and d are connected together at x so in one revolution the
arms c and d are each shoved once forward and backward.
On account of the link e (connecting the arm c with the needle rod /) being so
formed, by every stroke of the needle rod the hole e¹ (through which the thread
is passed) makes a larger movement than the rod h and so draws thread from the
spool k.
The oscillating of the plate p serves at the same time to work the feed motion or
transporter n, as shown in fig. 2-3, 6-7 ; on the plate p is fitted the spring y which
when the plate p is moved from right to left catches on the projection n' of the feed
bar n and so moves it, but on the return stroke the spring y allows of the projection n'
passing without imparting any motion to it. The amount of the feed bars movement
can be regulated by means of the screw o, the bar n is drawn back by the spring n³,
after being released from the spring y.
In the modification as shown in figs. 9 and 10 the shuttle is removed by letting the
arm m³ fall; this is brought about by drawing back the spring t¹ to which the pin m³
is fastened; the arm m² slides on the pin m³ and when it is removed the arm m³
falls down and with it the shuttle holder q.
The feed motion is driven from the lever d working on the slanting surface d¹ of
the double lever and so moves the feeder n.
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 sewing machines the combination of the two lever arms c and d with the
driving cam b, for the purpose as described.
2) In sewing machines the combination of the rod m with the shuttle carrying!
plate p, for the purpose as described.
3) In sewing machines the combination of the shuttle carrying plate p with the
spring y, for the purpose as described.
с
4) In sewing machines the combination of the levers c and d, needle rod h with the
link e, for the purpose as described.
5) In sewing machines the driving cam b, the combined levers c and d in combi-
nation with the rod m, shuttle carrying plate p, spring y and levert, for the purpose.
as described.
6) In sewing machines the driving cam 6,-the combined levers c and d and the
link e, in combination with the rod m, shuttle carrying plate p, spring y and levert,
for the purpose as described.
7) In sewing machines the combination of the standard a with the driving levers d
and c and cam 6 with shuttle carrying arm m², spring t', pin m³, as shown in figs. 9
and 10, substantially as described.
8) In sewing machines the feeding mechanism as shown in figs. 9 and 10,
consisting of the double lever d having the slanting surface d¹ feeder n with regu-
lating screw o in combination with the arm d, substantially as described.
Dated Berlin, this 18th day of December 1888.
A. KUHNT & R. DEISSLER,
38, Alexanderstrasse, Berlin C, Germany,
Agents for Applicants.