Improvements in or connected with Knitting Machines.
Year: 1898

page_text: Date of Application, 4th Feb., 1898-Accepted, 2nd Apr., 1898
COMPLETE SPECIFICATION.
Improvements in or connected with Knitting Machines.
We, ALBERT WEDERMANN, of Vienna VI Mariahilferstrasse, Knitting Machine
Manufacturer, and GUSTAV FRIEDRICH GROSSER, of Markersdorf, near Leipsic, in the
Kingdom of Saxony and Empire of 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 :-
This invention relates to improvements in knitting machines of the Lamb or
Foster type and has for its object to provide a yarn guide which shall be fixed or
firmly secured directly to the carriage instead of being movable to and fro thereon and
so enabling the dispensing with sliding mechanism stops and the like of the kind
heretofore employed.
In carrying out our invention we adopt a novel arrangement of lock mechanism
(hereinafter described) in combination with which we place a fixed yarn guide in a
line preferably directly central of the said lock mechanism.
The nature of our invention will be better understood by reference to the
accompanying drawings.
In the ordinary construction of the lock of flat knitting machines (shewn at Figs. 1
and 14) it is requisite that the yarn guide f should stand a certain distance behind
central cam of the locks in whichever direction the carriage is moving so as to be in
the right position relatively to one or other of the side cams y (Fig. 1) and y¹
(Fig. 1A) in order that the yarn may be seized by the descending needle heads at
the right time and securely held therein. To effect the moving of the yarn guide to
its altered position behind the wing cam at each reversal of the movement of the
carriage special mechanism known as "yarn guide bars" with "
bars have been employed.
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or friction
According to our invention we reverse the ordinary relative position of the lock
mechanism (as shown at Fig. 1) turning it over (as shewn at Fig. 2) the effect
being that the centre or wing cam y draws down and the two side cams y¹
and y raise up the needles instead of the wing cam raising and the side cams
drawing down the needles as heretofore. Although we have our improved fixed
yarn guide standing centrally over the lock as before stated we are enabled to
obtain the same desired effect of distance x between the eye of the yarn guide and
the point at which the yarn is seized and drawn down by the descending needles in
two ways firstly by adopting in the middle of the lock a "swinging" cam a (see
Figs. 3 and 34) moved or swung to and fro according to the direction of the carriage
by the pressure of the needle feet and to such an extent that the side of the swinging
cam for the time being drawing down the needles causes the said needles to seize the
yarn (whilst the carriage is moving in either direction) at a point exactly in the
middle of the lock and secondly by employing a fixed centre or wing cam a (see Figs. 4
and 44) of which the point n is in all cases a fixture and having movable or swinging
extension pieces a¹ and a². Thus at Fig. 3 the carriage being moved to the left the
needles z are raised by the side cam b¹ and drawn down on the left side of the wing
cam a. The carriage being moved to the right (see Fig. 34) the needles are raised by
the side cam 62 the needle heels then pushing the swinging wing cam a to the left

page_text: In the
the needles being drawn down therefore on the right side of the said cam.
arrangement shewn at Figs. 4 and 4^ the needles raised by the side pieces b¹ and b²
are drawn down alternately by the wing cam a and the extension pieces a² and a¹.
The parts a¹ and a² may then-either the one or the other of thein-be put out of
action by being pushed or drawn into the cam plate. If the part a¹ is arranged to
swing (as shewn at Fig. 3) the part a² is not required.
To adapt the improved construction of lock to the various kinds of loops in knitted
goods such as cardigan, one side plain, rib, and various other kinds the swinging wing
cam might be constructed in the following ways:-
At Figs. 5 and 6 the wing cam composed of the parts a and a¹ is mounted on a
plate a swinging in a groove c¹ in the cam plate c. To adjust the cam to work the
knitted web looser or tighter the position of the underneath part a of the wing cam
may be changed by means of the screw a². The part a is by means of a spring kept
constantly pushed against the part a¹ so that the two parts are kept in contact with
each other. The guard pieces a³ and as are for guiding the needle heels through the
grooves or passages a² and a³ so as to prevent them falling or dropping before they
have received the yarn. As soon as all the needles have passed through the lock the
swinging wing cam a a¹ gravitates into a vertical position as shewn at Fig. 5. At the
next course the needle feet push against the part a and press the wing cam over to
the far end of the groove in the cam-plate c the said cam being then in position for
working. On each side of the swinging cam a a¹ are the raising cams (see Fig. 7)
d¹ d² d³ d¹.
At
At Figs. 7 and 7 the lock is arranged as shown for circular work.
Fig. 7
the needle feet are raisedi
as the carriage is moved to the left
by the side cams d¹ and d and retain their raised position until they
push against the left side of the wing cam a a¹ and press it to the right
after which they are drawn down within the groove or passage a² and still further
down by the part a until at length the loops slip over the needle heads. When the
carriage is moved in the other direction that is from left to right (see Fig. 7A) the
working or swing movement of the wing cain is reversed the said cam a a¹ swinging
to the left the needles however not being raised the side cam ³ having been lifted
out of the way so as to be clear of the needles. When making the heel part of hose
of which one side is in plain work-the side cam d¹ is to be raised so as to miss the
needles so that in both courses the needles will be inoperative.
For producing cardigan work the upper part of the wing cam is made in two
parts a¹ and as (see Figs. 8 and 8) which are movable in the direction of their length
and can be pushed away a little from the lower part a so that the needle feet may
pass through the opening a³. This opening is arranged as in Fig. 8 and the sliding
part as is pulled by a spring towards and against the lower part a. As shewn at Fig. 8
the needle feet after having been raised to their highest position are passed into the
groove or channel a² along which they pass and enter the opening a and pressing
against the sloped off lower extremity of the sliding part as push it upwardly and
having passed through between the two side cams d³ and d remain at half height as
required for producing cardigan work. In the other direction of the carriage
(see Fig. 8) the sliding part as is pulled by its spring against the lower part a so
that the passage a is closed and the needle feet are consequently obliged to be drawn
down to their lowest position. By arranging the side cam d² to assume the position
shown at Fig. 9 the needle feet pass over the side cam d' that is to say between it and
the side cam d² the needles being thus only raised sufficiently high to take a second
ear of yarn when they are again brought down by the wing cam a a¹. When
the carriage is moved from left to right (see Fig. 9A) the loops slip over the
needle heads. In producing this class of cardigan work the guard wing a must
be in a lowered position as shewn at Figs. and 9A.
At Figs. 10 and 10ª the improved lock mechanism is shown as arranged for
producing ordinary ribbed work.
If a fixed wing cam a (see Figs. 11 to 16 inclusive) be used the construction of the
lock mechanism may be as follows:-d¹ d² d³ d' are lifting or raising cams the

page_text: parts a a¹ a forming the wing cam. a¹ and a² are bevelled or chamfered off on their outer
sides so that the needle heels instead of striking and passing or travelling along the
outer sides of the cams in the usual way press the parts a¹ a² back into the cam plate
so that at operates the needles only when the carriage moves to the right and a² only
when it moves to the left. The part a is a triangle having three equal sides and the
point n is exactly in the middle of the lock. For altering the tension of the yarn
from looser to tighter the parts a a¹ a² are arranged upon or within an extra plate k
(see Figs. 15 & 16) so as at will to be capable of being raised higher or lowered.
Figs. 11 and 11 show the locks arranged for producing circular and one side plain
work. Figs. 12 and 13 show the locks in position for cardigan work and Figs. 14
and 14 for one and one rib work.
It will be observed that in all the arrangements of lock mechanism hereinabove
described and illustrated in the drawings (with the exception of the ordinary
arrangement heretofore employed and shewn at Figs. 1 and 1A) we are enabled to
employ as herein before mentioned a yarn guide fixed or firmly fastened to the
carriage and thereby obviate the necessity of employing the usual stop mechanism and
attendant parts and are moreover enabled to limit the run or traverse of the carriage
to the distance covered by the needles actually required for the particular work being
done at the time being inasmuch as (with the exception of Figs. 2 and 2^) the wing
cam has its position automatically changed by the pressure of the needle feet at each
return movement of the carriage.
I can arrange the part y (Figs. 2 and 2) so that it is not moved by a "slight" but
automatically by the needle feet. The two parts y¹ and y² must then be arranged
swinging as shown in Fig. 7.
Although the same effect-that is to say a fixed yarn guide might be available-
by mounting the ordinary lock mechanism on an additional sliding plate so as to be
capable of being moved backward and forward the required distance at each return
movement of the carriage this would obviously be an inconvenient and undesirable
method.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what we
claim is
In flat knitting machines of the Lamb or Foster type the construction of lock
mechanism in which the wing cam in one or more parts is so arranged that the yarn
is delivered to the needle heads centrally of the said lock mechanism thus enabling a
yarn guide fixed or firmly secured to the carriage to be employed and the ordinary
stop mechanism to be dispensed with.
Dated this 4th 2
1000
Dated this 4th day of February 1898.
For the Applicants,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.