Improvements in or relating to Knitting Machines.
Year: 1895

page_text: Date of Application, 15th July, 1895
Complete Specification Left, 15th Apr., 1896-Accepted, 13th June, 1896
Date of Application, fomu
Complete Specification Left, 15th Apr., 1896-Accepted, 13th June, 1896
PROVISIONAL SPECIFICATION.
Improvements in or relating to Knitting Machines.
We, WILLIAM HARRISON, of 242 Plymouth Grove, Chorlton-upon-Medlock,
Managing Director of the Harrison Patent Machine Company, Limited, and
CHARLES WALLACE HARRISON, of Gilcrux Villas, Osborne Road, Levenshulme,
Secretary of the abovenamed Company, all in Manchester, in the County of
Lancaster, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the cams in the "Harrison" and
"Lamb" type of rectangular knitting machines.
The object of this invention is to enable circular or tubular webs to be produced
in said machines without the use of stops such as are employed to open and close
the ordinary construction of V or centre cams. We attain this object by the means
hereinafter described, reference being made to the accompanying sheet of drawings
illustrating our invention. In this invention for the purpose hereinbefore named,
we employ self acting cams which are hinged or constructed so as to turn up out
of the way and permit the needles to pass without altering their position when the
carriage is travelling in one direction, but which will come into contact with the
needles and change their position when said carriage is travelling in a reverse
direction.
We construct the aforesaid cams by placing a metal bar a within a groove formed
at an angle in the cam plate c. The bar a is connected to the cam plate in a manner
that said bar may be raised or lowered as required.
We attach to the underside of said bar by means of a hinge joint, a rectangular
cam bin a position that said cam will be at right angles to the cam plate c and will
fold or turn up against the bar a in one direction only, in the manner shown in
Fig. 2.
In applying our invention, the cams d and d' Fig. 1 are drawn up into the
cam plate so as to avoid contact with the needles when knitting tubular web.
When the carriage of the machine is moved in one direction, the heels of the
needles come into contact with the aforesaid cam 6 thereby causing said cam to be
turned up or folded against the bar a without affecting the position of the needles.
When the cam b is free from contact with the needles it will again fall into its
original position at right angles to the cam plate, and when the carriage is moved
in a reverse direction said cam will operate the needles, as the cam will remain
rigid, and the needles will be forced up the cam.
The aforesaid cams are placed one at each side of the needle bed, and are set to
close in reverse directions, the needles on one side being forced into action while
those on the opposite side of the machine are inactive.
By the alternate action of the cams herein before described tubular fabric is
produced.
Dated this 0th day of July 1895
THOMAS PRESCOTT,
53 Arcade Chambers, St. Mary's Gate, Manchester,
. Agent for Applicants.

page_text: Improvements in or relating to Knitting Machines.
We, WILLIAM HARRISON, of 242 Plymouth Grove, Managing Director of the
Harrison Patent Knitting Machine Company, Limited, and CHARLES WALLACE
HARRISON, of Gilcrux Villas, Osborne Road, Levenshulme, Secretary of the above-
named Company, all in Manchester, in the County of Lancaster, 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 the cams in the "Harrison" and the
"Lamb" type of rectilinear knitting machines.
The object of this invention is to enable circular or tubular webs to be produced
in said machines without the use of stops such as are employed to open and close
the ordinary construction of V or centre cams.
We attain this object by the means hereinafter described, reference being made.
to the accompanying sheet of drawings illustrating our invention in which
Fig. 1 is plan of a cam carriage, Fig. 2 is an end view of the same with our self-
acting cams applied.
Fig. 3 is an inverted view of the cam carriage showing cam plate and cams.
Fig. 4 is an inverted plan view of the cam plate with cams according to our
invention drawn to an enlarged scale.
Figs. 5 and 8 are side views of the aforesaid cams, the section of the cam plate c
and the cam carriage e being taken through line A. A. Figs. 3 and 4 and Figs. 6
and 7 are end views of the same on line B. B. in Figs. 5 and 8.
In these views similar letters refer to similar parts.
In this invention for the purpose herein before named, we employ selfacting cams
as 6 which are hinged, or constructed so as to turn up out of the way as represented
in Fig. 7 and permit the needles to pass without altering their position when the
carriage is travelling in one direction, but which will come into contact with the
needles and change their position when said carriage is travelling in a reverse
direction: We construct the aforesaid cams by placing a metallic plate a within a
groove or recess c¹ formed at an angle in the cam plate c.
We attach to the under-
side of said plate by means of a hinge joint such as da rectangular cam b that is
retained in position at a right angle to the cam plate c by means of a spring as f,
but is capable of being folded or turned up against the bar a in one direction only,
in the manner shown in Fig. 7. The aforesaid hinged cam 6 may either extend the
full length of the plate a or may be of a reduced length and supplemented by a
cam as that is fitted permanently to the plate a in a position at right angles
thereto as shown. The plate a is connected to the cam plate c in a manner that
said plate with the cams 6 and b¹ may be raised in order that they may pass over
the needles and leave them inactive when the cam carriage is required to be moved
along the machine for any purpose. The cams and gare raised in like
manner.
In the drawing the plate a with the cams 6 and 6' attached thereto is represented
as connected to the cam plate by means of the stud u and to the cam carriage e by
the stud to which a lever 9' is fitted which when the end of said lever is raised
withdraws the cams 6 and 6 into the cam plate c as shown in Fig. 8, the cam plate c
being attached to the cam carriage e in the ordinary manner. In applying our
invention, the cams and gare drawn up into the cam plate so as to avoid
contact with the needles when knitting tubular web. When the carriage of the
machine is moved in the direction indicated by arrow in Fig. 7, the heels of the
needles come into contact with the aforesaid cam b, thereby causing said cam to be
turned up or folded against the bar a without affecting the position of the
needles.

page_text: When the cam b is free from contact with the needles, it will by the action of
the spring or an equivalent again fall into its original position at right angles to
the cam plate c as in Figs. 5 and 6, and when the carriage is moved in a reverse
direction, said cam will operate the needles, as the cam will remain rigid, and the
needles will be forced up the cam.
The aforesaid cams are placed one on each side of the needle bed and are set to
close in reverse directions, the needles on one side being forced into action while
those on the opposite side of the machine are inactive.
By the alternate action of the cams as herein before described tubular fabric is.
produced. When both sets of needles are required to work simultaneously for the
production of such work as for the heel of a stocking, the cams g and g' are placed
in action in addition to the aforesaid cams b and b'.
Having now particularly described and ascertained the nature of this our said
invention and in what manner the same is to be performed, we declare that.
what we claim is :-
1st. In rectilinear knitting machines of the "Harrison" and the "Lamb" type
with the object of producing tubular fabric, the use of cams as 6 that are binged
or constructed so as to be capable of being folded or turned up into the cam plate
by passing over the heels of the needles without operating said needles when the
cam carriage is travelling towards one end of the machine, and when the traverse of
the cam carriage is reversed, the return of said cams to their original position and
to become rigid or fixed so as to operate the needles and force them up the cam
substantially in the manner and for the purpose hereinbefore described.
2nd. The use of a plate as a to which a hinged cam as bis connected, placed
within a groove or recess in the cam plate, in combination with mechanism as q
and q' or an equivalent by which said bar and cam may be withdrawn into the
cam plate out of the way of the needles, substantially as herein before described.
"
3rd. In rectilinear knitting machines of the "Harrison" and the "Lamb type
the combination of a plate as a, a hinged cam as b, and a fixed cam as 61 with
mechanism for withdrawing the same into the cam plate, substantially as herein-.
before described.
of Anvil 1906
THOMAS PRESCOTT,
53 Arcade Chambers, St. Mary's Gate, Manchester,
Agent for Applicants.
THOMAS PRESCOTT,
53 Arcade Chambers, St. Mary's Gate, Manchester,
Agent for Applicants.