Year: 1887

page_text: Date of Application, 5th Apr., 1887
Specification Accepted, 10th May, 1887.
[Communicated from abroad by JOSEPHINE BARBARA SCHROEDER, of Cleveland, in
the County of Cuyahoga and State of Ohio, United States of America,
Manufacturer.]
I PERCY HADDAN, of the firm of Herbert and Co., Patent Agents, of 67 Strand,
London, in the County of Middlesex, Civil 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 knitting machines in which are employed
two needle cylinders arranged concentric with each other together with the necessary
mechanism for operating two sets of needles and for guiding two threads respectively
to the different sets of needles to the end that two stockings or other garments that are
necessarily facsimiles of each other are simultaneously wrought at one operation of the
machine.
In the accompanying drawings Fig. 1 is a view in perspective of my improved
knitting machine, the needles being omitted to save complication in the drawing.
Fig. 2 is a vertical section through the centre of the machine.
Figs. 3 and 4 are enlarged views in perspective illustrating respectively the outside
and inside of the cam ring c.
Figs. 5 and 6 are enlarged views in perspective respectively showing the outside
& inside of the cam ring H.
Fig. 7 is a view in perspective of one of the inclines F.
Fig. 8 is a view in perspective of the arm J and attachments.
Fig. 9 is.a view in perspective of the spool rack and attachment.
Fig. 10 is a view in perspective of the rod a.
Fig. 11 is a view in perspective of the sleeve I.
A represents the base of the machine to which is rigidly attached the needle cylinder B
the latter having the ordinary needle grooves facing outward. The base A has an
annular chamber depression or groove in which operates the lateral beveled gear
ring D that is engaged by an upright gear D¹ the latter having a crank d for operating

page_text: the machine, the axle of the gear D₁ being journalled in suitable boxes depending
from the base A. The base has an opening not shown at the bottom of chamber a
that admits of the engagement of the two gears aforesaid.
The gear ring D has lugs that engage the lug e¹ of the cam ring, causing the
latter to turn with the movement of the gear. The cam ring is journalled in the lower
part of the cylinder B and has operating vertically on its inner face a cain c that
engages the outwardly projecting toes e of the needles E and operates the same the
needles having hook ends e above and being of the ordinary variety in common use.
The came has a hub c¹ that extends through a slot c² of the cam ring. This hub
outside the ring, has a threaded hole that engages the screw thread of the vertical
spindle c. This spindle is journaled in suitable lugs or boxes connected with the
ring c, and the spindle above the ring has a thumb piece c³ for rotating the spindle by
operating the cam e may be elevated or depressed to reduce or increase the depression
or throw of the needle. When the needles are at rest the toes e rest on a ledge c³ of
the ring c.
The cam ring on either side of the came has inclines F pivoted to the
ring c and presenting respectively from the cam the points or free ends of the inclines
resting on the ledge c³. When the cam ring is revolved one of the inclines F according
to which way the cam is moved engages successively the toes e¹ that by this means are
first elevated as the toes pass up over the incline after which the toes engage the came
and are depressed below the line of the ledge c³ as the toes pass successively under
The toes pass out under the opposite incline F the latter being tilted by
each outgoing toe.. The inclines F are rigidly secured respectively on pins that pass
through holes in the ring c and on the opposite side are bent at an angle forming
arms F that have slight springs attached, the tension of the spring acting in the-
direction to close the cams F upon the ledge c³. The inclines being so slight it is not
safe to depend on their gravity for closing them..
the cam.
By pivoting the inclines-instead of allowing them to work up and down in grooves
as heretofore, the friction at this point is reduced to a minimum. The parts, thus far
described with the exception of pivoting the inclines, are of the ordinary construction,
and are operated the same as heretofore.
It is therefore not considered necessary further to describe the operation of this
part of the machine. G is a needle cylinder, having needle grooves g that face
inwards. This cylinder carries the same number and kind of needles as the outside
cylinder B the needle grooves being of the same thickness, but the ribs between the
needle grooves being narrower than those of the outside cylinder. The manner of
supporting the cylinder G is as follows: An arm A¹ is rigidly attached to the
base A. This arm, as shown, extends laterally over the centre of the machine, and
has rigidly attached thereto the depending rod a, the latter being concentric with
the cylinders B and G. To the bottom of the rod a is attached the plate or
head a¹, to which latter is rigidly secured the cylinder G. Owing to the difference
in the diameters of the cylinders B and G an annular space is left between the two
cylinders that is unobstructed below and through which annular space the two
stockings or other garments wrought are made to pass, the one, garment being inside
of the other. A cam ring H operates inside of the cylinder G. This ring has a
cam and inclines that operate the same as those just described on the outside
cam ring. The cam ring rests on the plate a¹ and has a lug h³ that is engaged
by lugs of the sleeve I, the latter being mounted on the rod a. The upper end
of the sleeve I is flattened as shown in Fig. 11, and this flatted portion is embraced
by the forked end of the arm J, this latter arm being rigidly secured to the cam
ring C. When the latter is rotated the sleeve I and ring H are also rotated, the two
cam rings of course moving in unison. The ring H and its cam and inclines operate
the needles of the cylinder G in the same manner that the ring Coperates the
needles of the cylinder B. A standard K is rigidly attached to the ring C, and is
usually located opposite the arm J. Spindles are attached on which spools are.
mounted. In place of these spindles, cages or holders for balls of yarn or thread may
be substituted.

page_text: The thread, yarn, or whatever material is used leads up on the outside of the cross
piece and thence forward through a hole A, thence into the eyes of the spindles L
and out at the end opening of the same. From thence the respective threads lead
through loops m of the tension wires M. From thence respectively through hole j in
the arm J, and from thence through holes n and n' in the springs N and N, the latter
being connected with the arm J, and located respectively in such position that the
hole will guide the thread to the needles of the outside cylinders B and the holes
will guide the thread to the needles of the inner cylinder G. The springs N and NI
pass along respectively in front of the respective series of needles, and prevent the
threads from a possible premature disengagement from the needle-hooks. A series
of loops or hooks P are attached to a band p, the latter being usually of tin.
These hooks are for attaching the loops of yarn or thread in starting the garment
that is to be wrought on the outside cylinder the same as in ordinary knitting
machines. To the band p is attached a weight to keep the garment taut. A smaller
inside ring p, with hooks p, is provided for the inside garment, and of course has
weights attached for keeping this garment taut. The two garments thus simul-
taneously wrought on the machine if made of the same material will be fac similes of
each other. The outer garment may be stretched a trifle during the knitting, or the
inner garment may be compressed a trifle, but when the two garments are removed
from the machine and separated, it is impossible to tell from their appearance which
was the inner and which was the outer garment in the process of knitting.
It of course takes double the time to start the two garments that it would take to
start the one garment on a single machine, but after the starting, the two garments
may be wrought in the same time that a single article would be wrought on a
single
machine, with the further advantage that the two articles designed for a pair, will be
absolutely alike, whereas with the single machine, the second article wrought may or
may not be like the first according as the operator has or has not measured correctly,
or has or has not manipulated the machine the same in knitting the heel and other
irregular parts of the two garments.
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 :-
1. In a knitting machine, the combination, with two needle cylinders, and needles
and two cam rings arranged substantially as described, of an arm and sleeve as shown
for connecting the two cam rings so that they move in unison, substantially as set
forth.
2. In a knitting machine the combination with the needle cylinders, and needles,
two cam rings arranged substantially as described, and an arm and sleeve connecting
the two cam rings whereby they move in unison, of the spindles for supporting the
material and guides, the said spindles and guides being supported by the outer cam
ring so as to revolve with the same substantially as set forth.
3. In a knitting machine the combination with two needle cylinders, and needles,
two cam rings, and the cams and pivoted inclines, of an arm and sleeve as shown for
connecting the two cam rings so that they move in unison, substantially as set forth.
Dated this 5th day of April 1887.
.
ERGY HADDAN.
By Herbert & Co.,
67, Strand, W.C.,
Agents to Applicant.