Improved Apparatus Applicable to Straight Bar Knitting Machines.
Year: 1890

page_text: Date of Application 2nd Jan., 1890
Complete Specification Left, 24th May, 1890-Accepted, 5th July, 1890
PROVISIONAL SPECIFICATION.
Improved Apparatus Applicable to Straight Bar Knitting Machines.
I JOHN ALFRED WILSON, the Park, Nottingham, Hosiery Manufacturer, do hereby
declare the nature of this invention to be as follows
″
In addition to each straight bar knitting machine employed in making welted:
ribbed looped fabrics I employ an additional bit on the studded pattern wheel usually
employed to traverse two thread carriers. Two additional shafts to move the slide.
and presser trucks out of action. I enlarge a cam to lift the driver clear of the.
carriers, I employ an extra shaft to traverse the sinking trucks onto a smaller cam,
and the requisite number of cam bits on the side of the pattern wheel to traverse the:
trucks for operating the frame needle bar, sinker bar, machine presser bar, and
knocking over slides.
The whole arranged to work in combination with a straight bar knitting machine
for inserting a draw thread to separate each welt from the next adjacent piece of
fabric.
Instead of employing a splicing thread and cutting through the fabric at each
welt.
1000
H. W. GOUGH, C.E.,
Agent.
COMPLETE SPECIFICATION.
Improved Apparatus Applicable to Straight Bar Knitting Machines
I JOHN ALFRED WILSON, the Park, Nottingham, Hosiery 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:
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a side view of portion of the standard at the right end of a straight
bar knitting machine with my improved apparatus applied thereto, for selecting two
or more thread carrier bars.
Figures 14, 18, and 1° show right side views of certain cams, truck traversing
levers, and the back ends of truck bearing levers severally referred to hereafter.
Figure 2 a front view of three thread carrier bars, a pattern wheel and two cam
bits.
Figures 2A, 2B, and 2 show right end views of three thread carrier bars, and
portions of a studded pattern wheel, with the driver in three different positions.
Figure 3 shows in plan the relative positions of a cam shaft, and two shafts C and D
provided with levers for traversing the trucks operated by the cams.
Figures 4 and 44 show respectively enlarged views of the left edge and outer side
of a cam E attached to the pattern wheel for traversing the shaft (nearest the cam
shaft, and the trucks K and K¹.
Figures 5 and 54 show like views of the cam bit attached to the pattern wheel for
traversing the front shaft D and truck K².
Figure 6 is an enlarged right side view of a portion of a studded patteru
wheel A.
The drawing show the improved apparatus as applied to a straight bar knitting
machine provided with a pattern wheel and a chain carrying studs of varying heights
described in the Specification of a Patent granted to Thomas Wigfield for Improve-
2

page_text: ments in machinery and apparatus applicable to rotary machines employed in the
manufacture of ribbed or plain looped fabrics, dated November 21st 1877, and
numbered 4358.
To facilitate the separation of each piece of welted ribbed looped fabric made on a
straight bar knitting machine from the next adjacent piece employ apparatus
arranged as follows: On the pattern wheel A usually employed see Figures 1, 2
and 6, the stud A' places the driver B in the position shown at Figure 24 to engage
with the fork on the back carrier lar 1.
Three carrier bars are shown in the Drawings each being provided with as many
tbread carriers as there are widths of fabric made on the machine.
The bar 1 being provided with thread carriers 1* for inserting threads to connect
adjacent pieces of fabric. The central carrier bar 2 being provided with thread
carriers 2 which carry the threads for making the ground or body of the ribbed top
while the driver B is held in the position shown at Figure 2B by either of the
studs A².
When the studs A³ hold the driver B in the position shown at Figure 1 it engages
with the fork on the carrier bar 1, and the fork on the carrier bar 2 the carriers 1*
and 2 laying their threads across the needles from right to left.
The driver B is lifted clear of the forks on the whole of the carrier bars during
one course by studs A* as shown at Figure 2º.
The front carrier bar 3 provided with thread carriers 3* is only employed when
making a coloured top to the top of the welt or when making striped work of two
colours, the driver B being placed so as to engage with the fork on the bar 3 by
studs A indicated by dotted lines on Figure 6. Or if more than two colours are
required a separate carrier bar and thread carriers are employed for each colour being
selected in turn by studs on a linked chain in the usual way. The draw threads for
connecting adjacent pieces of fabric are described as being traversed by the thread
carriers 1* on the bar 1, and the ordinary threads by the carriers 2* on the bar 2,
instead of which such threads may be placed respectively in the carriers on the
bars 2 and 3, or if four thread carrier bars are employed the threads may be placed
in the carriers on the bars 3 and 4 or any other suitable arrangement may be
employed, care being taken that the two bars are traversed together in one course.
The cams shown in side views at Figures 1, 1A, 1B, 1° and in plan at Figure 3 are
portion of those usually employed arranged as follows:-Number 1 cam operates the
machine needle bar, 2 is the usual welting cam, 3 the cam to work the ordinary
course on the frame needles, 3^ the ordinary slack course cam, 4 the usual machine
needle presser cam, the truck is traversed off this cam to misspress after the thread
carriers 1 and 2* have laid in their threads to prevent the loops from running
down, 5 the usual machine needle slide cam, the track of this cam is traversed off the
cam at the same time as the truck of four cam.
The trucks to be traversed are grooved to receive the forked ends of levers carried
by two shafts C and D in the usual way, these shafts slide in bearings E secured to
the standards. Each shaft is provided with a spring helically coiled round it near
the left end, a spring C on the shaft C being placed between the bearing and the
boss of the forked lever nearest it, the spring pressing the shaft towards the right end
of the machine while the ordinary courses of the fabric are being made. And a
spring D₁ on the shaft D being placed between the bearing and a boss secured on the
shaft, the spring pressing the shaft towards the right end of the machine while the
ordinary courses of the fabric are being made.
The sliding of the shaft C and D to the left for traversing the trucks is effected as
follows-The shaft C is provided with a boss from which an axle pin C² projects con-
nected by a link to an horizontal lever (the front end of which rocks on an axle
projecting from the underside of a bracket G secured to a front rail G₁ of the
machine shown in plan at Figure 3, the lever (³ being pressed by the spring C¹ onto
the inner end of a bolt C sliding in a bearing F secured to the right end standard.
The bolt C is moved to the left during the making of the welt and insertion of
the draw thread to connect adjacent pieces of fabric, by one or other of the cam bits

page_text: numbered 7 to 17 on a cam E secured to the left side of a pattern wheel A shown at
Figures 1 and 2. The cam bits numbered 7, 8, 9 and 10 of the cam E, shown at
Figare 44 are in addition to the bits numbered 11 to 17 usually employed when
making the welt.
The consecutive traversing of the trucks is as follows:-After the forming of the
usual slack course at the bottom of each ribbed top or length of fabric. the usual six
courses of fabric is made. At the seventh course, the cam bit 7 traverses the trucks K
further on the cams 1 towards the cams 2, and the trucks K' off the cams 4 and 5 to
misspress the machine needles. At the eighth course the cam bit 8 allows the trucks K
to be traversed on the cams 1 from the cams 2, and the trucks K onto the cams 4
and 5 to work an ordinary course. At the ninth course the cam bit 9 traverses the
tracks K further on the cams 1 towards the cams 2, and the trucks K' off the cams 4
and 5 to prevent the fabric from being pressed off the machine needles while the
remainder of the course is finished. At the tenth course the cam bit 10 allows the
trucks K to be traversed on the cams 1 from the cams 2, and the trucks K' onto
the cams 4 and 5 to work an ordinary course with the draw threads in the
carriers 1*.
At the eleventh course the cam bit 11 traverses the trucks K. further on the cams 1
towards the cams 2, and the trucks K' off the cams 4 and 5, while the first course
of the next welt is made. At the twelfth and five succeeding courses the cam E
holds the trucks in position to make the welt in the ordinary way.
The shaft D is provided with a boss from which an axle pin D² projects, connected
by a link to an horizontal lever D³, the front end of which rocks on the axle
projecting from the bracket G before named, the lever D³ being pressed by the
spring D onto the inner end of a bolt D' also sliding in the bearing F before named.
The bolt D is moved to the left by the usual cam bit H secured to the left side of the
pattern wheel A to slide the shaft D and traverse the truck K2 onto the cam 3ª when
making the ordinary slack course.
Having described the several movements resulting from the employment of the
additional studs A³, A1, A2 and the cam bits 7, 8, 9 and 10 on the usual pattern
wheel A of a straight bar knitting machine, employed in making welted ribbed looped
fabrics, I will describe the combined movements which occur in succession to insert a
draw thread, the removal of which will cause the welt of one piece to separate readily
from the next adjacent piece of fabric.
After the forming of the usual slack course at the bottom of each ribbed top or
length of fabric the usual six courses of fabric is made in the usual way.
At the seventh course the driver B takes 1* and 2* carriers across the needles from
right to left and misspress on the machine needles, the two threads preventing the
loops from running. At the eighth course the driver takes the carriers 2* back from
left to right making an ordinary course and leaving the draw thread carriers 1* at
the left. At the ninth course the driver is moved clear of the carrier bar forks, while
the work is pressed off the frame needles, the driver passing to the left. At the
tenth course the driver brings the carrier 1* back from left to right to insert the
draw thread by itself to be looped or interlocked with the loops of the next course.
At the eleventh course the driver takes 2* carriers from right to left to form the
first course of the next welt, then from left to right and right to left alternately to
make the length of fabric required, previous to the above movements beirg repeated
to again insert the draw threads.
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 straight bar knitting machine making welted ribbed looped fabrics, the
employment of the additional stud or studs A³ on the pattern wheel A for placing the
thread carrier bar driver B in the position shown at Figures 1 and 2, for taking
the draw thread carriers 1* and the ordinary thread carriers 2* across each width of
needles at the same time for one course, substantially as described.

page_text: 2. The employment of the additional stud or studs A* on the pattern wheel A to
hold the driver B clear of the whole of the carrier bars while the work is pressed off
the frame needles substantially as described.
3. The employment of cam bits 7, 8, 9 and 10 on the usual pattern wheel A in
addition to the usual welting cam E for traversing the trucks operated by the
cams 1, 2, 4 and 5 to enable draw threads to be inserted to connect adjacent
pieces of ribbed looped fabric, the pieces being afterwards readily separated by
simply pulling out the draw threads, instead of employing a splicing thread and
cutting through the fabric in the usual way.
Dated this Twenty-third day of May 1890
Witness,
H. W. GOUGH, C.E.,
Nottingham.
JOHN ALFRED WILSON.