Improvements in Machines employed in the Manufacture of Knitted Loop or Pile Fabrics.
Year: 1890

page_text: Date of Application, 4th Feb., 1890
Complete Specification Left, 1st Nov., 1890-Accepted, 6th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Machines employed in the Manufacture of Knitted
Loop or Pile Fabrics.
I, JAMES BOOTH of Lee Mills, Halifax in the County of York Manufacturer do
hereby declare the nature of this invention to be as follows:-
--
This invention relates to machines (of above class known as straight bar knitting
machines) employed in the manufacture of knitted looped or pile fabrics and
consists in the application to, and combining therewith of devices for varying the
length of loop or pile also to apparatus for operating the longitudinal bar carrying
the "guides" and to an improved construction of "guide or appliance connected
therewith, for separating and guiding the several threads or yarns on their passage
to the guide eyes, thereby preventing breakage and entanglement of such yarn.
23
According to this invention I employ apparatus for sliding the longitudinal bar,
or guide carrier, backwards and forwards in slide beds, or bearings, carrying the
same the amount of movement of or length of stroke, of the longitudinal bar, being
adjustable by changing the operating cam or tappet, thus the length of loop formed
by the guides can be varied.
On a cross rail at one end of the machine is bolted a bracket, a similar bracket
being at the opposite end of the frame or machine, these brackets carry pins, or
studs, forming fulcrums for uprights or vertical levers, the opposite ends of such
levers being drawn, by a spring or pressed by a cam towards the front of the
machine. About midway the length of the vertical levers are mounted horizontal
and curved arms, or levers, which are connected to each end of the longitudinal bar
carrying the guides. The longitudinal bar is formed as ordinary, but in lieu of
being carried in a fixed bearing and the motion given thereto being radial, or
describing the arc of a circle, the bar is mounted, and carried in horizontal slide beds,
or bearings, which are attached to the end frames of the machine. Below the
horizontal curved arms, and on the vertical levers, are antifriction runners, acted upon
by a cam, or tappet mounted on the main driving shafts of the machine.
At each revolution of the tappet or cam, the vertical levers are forced backwards,
and as the cam revolves, are again drawn forwards by the spiral spring, or cam, thus
a rocking, or to and fro motion is imparted to the vertical levers, and also to the
horizontal curved arms, which being connected to the longitudinal bar carrying the
guides, gives a backward and forward or to and fro inotion to the latter in
the horizontal slide bed or bearings, and this motion being a true horizontal one to
the machine can be adjusted to a great nicety and by changing and varying the
"throw" of the operating can or tappet loops or pile of one determined length can be
woven in the fabric.
The improvements in the guides consist in inserting between each of the guide
needles a small curved finger, which serves to separate the several yarns, or threads
each one of which is passed between two of the said fingers and the threads are thus
separated before arriving at the "eyes" in the guides and breakage and entanglement
(especially in the case of mohair and other clinging yarns) is prevented.
When manufacturing: knitted pile fabrics the above described appliances are
employed in combination with the apparatus described in Specification of Letters
Patent numbered 2872 granted to me and dated the 19th of February 1889.

page_text: COMPLETE SPECIFICATION.
Improvements in Machines employed in the Manufacture of Knitted
Loop or Pile Fabrics.
:-
I, JAMES BOOTH, of Lee Mills, Halifax in the County of York, Manufacturer, do
hereby declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following statement:-
This invention relates to machines (of above class known as straight bar knitting
machines) employed in the manufacture of knitted looped or pile fabrics and consists
in the application to, and combining therewith of devices for varying the length of
loop or pile also to apparatus for operating the longitudinal bar carrying the "guides"
and to an improved construction of "guide" or appliance connected therewith, for
separating and guiding the several threads or yarns on their passage to the guide eyes
thereby preventing breakage and entanglement of such yarn.
According to this invention I employ apparatus for sliding the longitudinal bar, or
guide carrier backwards and forwards in slide beds, or bearings, carrying the same the
amount of movement of or length of stroke of the longitudinal bar, being adjustable
by changing the operating cam or tappet, thus the length of loop formed by the guides
can be varied.
On a cross rail at one end of the machine is bolted a bracket, a similar bracket
being at the opposite end of the frame or machine, these brackets carry pins, or studs
forming fulcrums for uprights or vertical levers, the opposite ends of such levers being
drawn, by a spring or pressed by a cam towards the front of the machine. About
midway the length of the vertical levers are mounted horizontal and curved arms or
levers which are connected to each end of the longitudinal bar carrying the guides.
The longitudinal bar is formed as ordinary, but in lieu of being carried in a fixed
bearing and the motion given thereto being radial or describing the are of a circle the
bar is mounted, and carried in horizontal slide beds or bearings, which are attached to
.the end frames of the machine. Below the horizontal curved arms and on the vertical
levers, are antifriction runners, acted upon by a cám, or tappet mounted on the main
driving shafts of the machine."
At each revolution of the tappet or cam, the vertical levers are forced backwards
and as the cam revolves, are again drawn forwards by the spiral spring, or cam, thus
a rocking, or to and fro motion is imparted to the vertical levers, and also to the
horizontal curved arms, which being connected to the longitudinal bar carrying the
guides, gives, a backward and forward or to and fro motion to the latter in the hori-
zontal slide bed or bearings, and this motion being a true horizontal one to the machine
can be adjusted to a great nicety and by changing and varying the "throw" of the
operating cam or tappet loops or pile of any predetermined length can be woven in
the fabric.
The improvements in the guides consist in inserting between each of the guide
needles a small curved finger which serves to separate the several yarns or threads
each one of which is passed between the said fingers and the threads are thus separated
before arriving at the "eyes" in the guides and breakage and entanglement (especially
in the case of mohair and other clinging yarns) is prevented.
When manufacturing knitted pile fabrics the above described appliances are
employed in combination with the apparatus described in Specification of Letters
Patent numbered 2872 granted to me and dated the 19th of February 1889.
Such being the nature and object of my said invention, the following is a complete
description of same reference being had to the accompanying drawings in which :-
Fig. 1 is a side elevation of my improved appliances for operating the longitudinal
bar carrying the guides and varying the length of the loop or pile.
Fig. 2 is a front elevation of same shewing so much of a straight bar knitting
machine as is necessary to illustrate my invention.
Fig. 3 is an enlarged end view of a portion of the guide bar and guide shewing the
device for guiding and separating the threads or yarn and
Fig. 4 is a front view of same

page_text: According to this my said invention for the purpose of varying the length of the
loops (or pile) I employ the arrangement shewn in Figs. 1 and 2 of the drawings by
which a backward and forward motion is given to the longitudinal bar 1 carrying
the guide eyes 2 by which the backward and forward movements of the guide
eyes 2 employed for laying the yarns or threads upon the needles and pile forming
hooks in the operation of knitting is effected.
The bar 1 is secured in a bar 3 as shown in Figs. 1 and 2 the said bar 1 being
attached to the part 4 (Figs. 1 and 2) which is attached to the arm 5 the end of which
is secured to tho shaft 6. This shaft is carried in a bearing 7 at each end and can
move to and fro in the slide bed 8, and a corresponding one at the other end of
the machine. The shaft 6 is moved from an arm 9 attached to same at one end and
adjustably secured at the other in an adjustment slot 10 of a rock lever 11 which is
pivotted on a stud 12 carried by the bracket 13 which is bolted to a cross rail 14 of
the framework of the machine. The rock lever 11 carries a roller 15 which bears
against a cam 16 secured to the main driving shaft 17 of the machine.
The upper end of the lever 11 is hooked and is attached to a spring 18 which
The other end of the said
serves to draw it back when forced out by the cam.
spring is secured to an arm 19 fixed to a cross rail 20 to which the slide bed 8 is
also attached. It will be seen that by changing the operating cam 16 and by
substituting a larger or smaller one according to the longer or shorter length of
loop or pile desired, the movement of the. rock lever 11 and arm 9 can be adjusted
and consequently the movement of the shaft 6 and the length of the loops formed by
the guide eyes 2 be controlled the guide eyes 2 passing the yarn over the hooks or
holders 4 which are adjusted as to accommodate themselves to the length of loop or
pile to be formed being moved further from the guide eyes 2 for a large loop, and
nearer to for a short loop or pile and operating as described in Specification of
Patent No. 2872 of the year 1889; this arrangement of parts enables the machine
to be adjusted to a great nicety so that an even loop or pile of the predetermined
length can be woven in the fabric.
The arm 5 carries the guide rods 21 for separating the yarns as they pass down
to the guide eyes 2 said rods being made of sufficient length to allow for the back-
ward and forward movement of the arm 5. For the purpose of further separating
the threads or yarns before reaching the guide eyes I provide however curved
fingers 22 which are attached to the bar 1 between each of the guide eyes 2. Each
of the threads or yarns passes between two of these fingers 22 so that they are well
separated and breakage and entanglement (especially in the case of mohair and other
clinging yarns) is avoided. When manufacturing knitted pile fabrics the above
described appliances are employed in combination with the apparatus described in
Specification of Letters Patent No. 2872 granted to me and dated the 19th of
February 1889.
Having now particularly described and ascertained the nature and object of my
said invention, and in what manner the same is to be performed, I declare that
what I claim is :-
1. In a straight bar knitting machine the guide eyes 2 arm 5 shaft 6 slide bed 8
arm 9 and rock lever 11 all in combination as and for the purpose herein described
and operated and operating substantially as herein described and as illustrated by the
drawings annexed.
2. In a straight bar knitting machine the guide eyes 2 and curved fingers 22 secured
to the bar 1 all in combination and as and for the purpose herein described and as
illustrated by drawings annexed.
onl
1
1800