Improvements in Knitting Machines and the Fabrics Produced thereon.
Year: 1892

page_text: Date of Application, 19th Dec., 1892
Complete Specification Left, 19th Oct., 1893-Accepted, 25th Nov., 1893
Complete Specification Left, 19th Oct., 1898-Accepted, at wor
PROVISIONAL SPECIFICATION.
Improvements in Knitting Machines and the Fabrics Produced
thereon.
I JOSHUA MARRIOTT, Goldsmith Street Works, Nottingham, Hosiery
Machinist, do hereby declare the nature of this invention to be as follows:-
In each circular knitting machine for making ribbed looped fabrics I employ a
series of graduated nebbed jacks carrying machine needles, operated by a
horizontally sliding clearing cam, connected to a rocking lever actuated by a cam or
cams carried by the usual welting wheel, or by studs on a pattern chain.
Or in each circular knitting machine for making plain looped fabrics I employ a
series of graduated nebbed jacks carrying frame needles operated by a sliding
clearing cam connected to a lever actuated as before described.
By the circular ribbed knitting machine a graduated tucked patterned ribbed
looped fabric may be made. Or by the circular plain knitting machine a graduated
tucked patterned plain looped fabric.
The pattern in either case depending upon the cam or cams or studded pattern
chain employed.
COMPLETE SPECIFICATION.
Improvements in Knitting Machines and the Fabrics Produced
thereon.
I, JOSHUA MARRIOTT, of Goldsmith Street Works, in the Borough of
Nottingham, Hosiery Machinist, 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 the improvements applicable to circular rib or plain
knitting machines for the purpose of adapting such machines for producing tucked
patterned rib, or tucked patterned plain fabric, or patterns in colors.
It will be best understood by reference to the accompanying drawings in which-
Fig. 1, is a vertical section, and
Fig. 2, a plan of a circular rib frame to which my invention is applied.
Fig. 3, is a full size view showing the construction of the jacks, and
Fig. 4, is a view of the jacks shown in Fig. 3, reversed.
Like letters indicate like parts throughout the drawings.
In a circular rib frame the jacks a which carry and operate the machine needles a¹
are formed with outwardly projecting nebs or tails b, at their upper ends of varying
lengths, the clearing cam c, which raises these nebs or tails 6 as the jacks rotate
with the frame, is carried by a horizontal and preferably radial slide d working in
a bracket & secured to the framing.
The slide d is operated by a bell-crank lever e, pivotted at e' to the upper end of
the axle of the pattern wheel g. The upper end of the lever e is provided with
a slot or fork which engages with a pin d³, secured to the slide d, and its lower
end is provided with a stud e which follows the surface of the pattern wheel g.
The pattern wheel g is provided with a ratchet wheel g¹ which is operated by a
pawl (Fig. 2) pivotted to an arm secured to the shaft. The shaft is
reciprocated by a cam (not shown) on the underside of the frame, in peripheral
contact with an anti-friction roller on an arm secured to the shaft, or other
convenient arrangement may be employed.

page_text: If preferred a pattern chain may be employed instead of the wheel
9.
By this arrangement the distance of the clearing cam c from the centre of the
frame may be decreased so as to successively bring into action the jacks with the
shorter tails or nebs b, and increased so that the said shorter tails will again miss
the clearing cam and the jacks pertaining to them remain inactive.
Only those machine needles which are carried by the jacks in action will take
the thread from the feeder h of the clearing cam c and in order that all the inactive
needles may make at least one loop, a second duplicate clearing cam c¹ may be
employed and adjusted in the position shown so as to operate the whole of the
jacks a and machine needles, which latter will, at this point, take the thread from
the feeder of the clearing cam c.
With this arrangement the machine needles operated by the clearing cam c will
make two loops, (those operated by the cam c' making only one) and will thus make
tucked patterned rib fabric, the pattern of which is governed by the disposition of
the jacks a with different lengths of tails or nebs b, and the movement imparted to
the cam c by the pattern wheel g.
By using different colored threads in the feeders' patterns may be produced
in colors but for this purpose I preferably impart a radial sliding movement to
the duplicate clearing cam c¹ and employ jacks constructed as shown in Figs. 3
and 4.
The duplicate clearing cam c³ may be carried in the same manner as the cam c
and the former connected to the latter by a bracket k, so that as one moves
towards the centre of the machine, the other moves a corresponding distance away
from it.
In Fig. 3, six jacks a are shown placed one behind the other each of which is
provided with a tail or neb b of a different length, and Fig. 4 is a view of the same
jacks reversed. The jacks a are numbered one to six, the former having the longest
and the latter the shortest neb or tail b. Each of the tails or nebs b is provided
with a projection 6¹ and the length of these projections is in inverse order to that
of the tails or nebs b, that is, the jack with the longest tail is provided with the
shortest projection 61, number one having the shortest, and number six the longest
projection as shown.
The duplicate clearing cam c¹ is adjusted so as to act on the underside of the
projection 6 of the jacks a and as this cam moves in the reverse direction to the
clearing cam c it will only operate those jacks which are not operated by the cam c
and those needles which do not take the thread from the feeder h will take it from
the feeder h¹.
With this arrangement a more distinct pattern is obtained in colors.
The number of jacks a employed with nebs or tails of a different length and
their disposition may be modified to suit different requirements, the number of
clearing cams c c¹ and feeders h h¹ may also be increased if desired.
In a circular knitting machine for making plain looped fabric the jacks 1 (see
Fig. 1, which carry and operate the frame needles m may be formed with their
nebs of different lengths, and be operated by a sliding and a fixed clearing cam
of similar construction to, and operated in the manner herein described in reference
to the jacks a so as to produce a tucked patterned plain fabric.
The jacks may also be formed with nebs of the same construction as shown in
Figs. 3 and 4, and be operated in the same manner as described in reference to the
rib frame, by two sliding, clearing camis, so as to produce a plain, patterned fabric
in colors.
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 a circular knitting frame the employment of needle operating jacks with
nebs or tails of different lengths substantially as described and illustrated in the
1

page_text: 2. In a circular knitting frame the combination with needle operating jacks such
as a or having nebs or tails of different lengths of a sliding clearing cam, such
as c, substantially as described and illustrated in the accompanying drawings.
3. The combination with a circular, knitting frame of jacks having nebs or tails
and projections such as 6 b¹ of various lengths those with the longest nebs having
the shortest projections and vice versa, the others graduating between these extremes,
substantially as described and illustrated in the accompanying drawings.
4. In a circular knitting frame the combination with needle operating jacks such
as a or having nebs or tails b and projections of different inverse lengths of
sliding clearing cams, such as c, c', substantially as described and illustrated in the
accompanying drawings.
5. In a circular knitting frame the combination with a clearing cam c of a slide
such as d lever e, and pattern wheel g substantially as described and illustrated in
the accompanying drawings.
6. A knitted ribbed circular fabric composed of one or more pairs of threads in
which the loops made by the machine needles in a course are part formed by one of
the threads and the remainder by the other thread of each pair substantially as
herein described.
7. A knitted plain circular fabric composed of one or more pairs of threads in
which the loops in a course are part formed by one of the threads and the remainder
by the other thread of each pair, substantially as herein described.
Dated this 18th day of October 1893
W. P. THOMPSON & BOULT,
'Agents for the Applicant.