Improvements in Straight Bar Knitting Machines.
Year: 1896

page_text: Date of Application, 10th Sept., 1896
Complete Specification Left, 5th June, 1897-Accepted, 7th Aug., 1897
PROVISIONAL SPECIFICATION.
Improvements in Straight Bar Knitting Machines.
I, HENRY WILKINSON, 115 Mansfield Road, Nottingham, Manufacturer of Surgical
Appliances, do hereby declare the nature of this invention to be as follows:-
My improvements applicable to straight bar knitting machines provided with
two rows of latch needles crossing each other, consist in providing each division of
the machine with a carrier supplied with an india rubber thread, or a thread of
rubber covered with a thread of cotton, silk, worsted, or other fibre.
The traverse of the carrier being effected by the usual cam carriage of the division.
The fashioning of the fabric being effected in the usual way as regards the narrowing
and widening. But to enable fabrics to be made deeper at one end than the other,
or deeper at the centre or elsewhere, the stems of the needles are hinged above the
cramped portion operated by the usual cams.
The under portions of the needle sleys being cut away to receive the cranked
portions of the needles. When the needles are operated by the usual cams they
are held in position by vertically sliding plates, one to each needle, in sleys beneath
each division operated by the attendant.
Dated this Ninth day of September 1906
H. W. GOUGH, C.E.,
Agent.
Improvements in Straight Bar Knitting Machines.
I, HENRY WILKINSON, 115 Mansfield Road, Nottingham, Manufacturer of Surgical
Appliances, 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 left end view of the needle bed of a straight bar knitting
machine provided with two rows of latch needles 1 in their lowest position while an
indiarubber thread is laid below and between the needle heads.
Figure 2 shows a front view of the left end of the needle bed with the indiarubber
thread carrier 2 and the usual thread carrier 3 in the relative positions they occupy
at the completion of a course traversed from the right to the left. The corresponding
parts in each figure are indicated by the same numbers where necessary.
An additional carrier thread 2 is provided to each division of the machine and
supplied with a thread of indiarubber 4 covered with either cotton, silk, worsted,
[Price 8d.1

page_text: or other fibre. The traverse of the carrier being effected by the cam carriage 5,
the cains are not shown in the drawings being those of the usual shape, the cam
carriage is carried by two bars 6 connected at their left end by a bracket 7 sliding
on a short arm 8 projecting from the left end of the neodle bed, the bracket is
shown only by dotted lines at Figure 1, from the front of the bracket an arm
projects and engages with the left end of a connecting rod 9 operated by a crank
at the right end of the machine. The lower edges of the cam carriages slide in
grooves in the sides of two bars 10, secured at each end to the bed of the machine.
On the top of each bar, a stop boss 11 slides being adjusted to the width of fabric
made by a spring bolt 12. Each stop boss is provided with an upper incline 13
which lifts up the usual spring bolt on the cam carriage, and a lower additional
incline 14 which operates to take up the slack of the covered rubber thread 4 at
the termination of the right to left traverse, as the traverse from left to right is
commenced. There being a similar stop boss and inclines near the right end of the
bed to take up the slack of the thread 4 as it is traversed from right to left.
The slack of the thread 4 is taken up as each traverse is commenced by a stud 15
being lowered as it passes over the cain 14, the stud projects fom the lower end of
a plate 16 sliding on the carrier 2 provided on its lower side with a bracket and axle
pin 18 on which a take up lever 19 rocks, and carries a loop 20 at its upper end
through which the covered rubber thread is passed. The plate 16 is held in its
normal position as shown at Figure 1 by a spring 17 which gives away as the
stud 15 is lowered by the cam 14 and places the lever 19 into the position shown
by dotted lines at Figure 1, taking up the slack and then releasing it at the com-
inencement of the traverse either way. The thread 4 below the loop 20, is passed
through the upper end of a bracket 21 at the back of the carrier 2, through a
tube 22 and through the lower end of the carrier 2 by which it is laid between the
heads of the needles 1, being held down by one of the usual brushes 23, carried by
a rocking three armed bracket 24, the rocking being effected by a link 25 swivelled
to the central arm and engaging with a pin carried by a friction boss 27 sliding on
a rod 28 supported by an arm at each end of the bed. The rocking of the bracket 24
is adjusted by two set screws 26 in the ends of an arın secured to the carrier 2, the
right brush being raised, and the left brush being lowered at the commencement of
each left to right traverse. At the commencement of the left to right traverse the
carrier 2 slides over the usual thread carrier 3, both carriers being inclined from
the centre to the edges on their inner sides to enable them to slightly spring
outwards as they pass each other, the carrier 2 laying the covered rubber between
the heads of the needles 1 which are then raised by their cams to cross each other
while the usual thread carrier 3 lays its thread on the needles to knit in the rubber
thread.
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 :-
The employment of a carrier 2 to insert a covered india rubber thread 4, below
the heads of two rows of latch needles for producing an elastic ribbed looped fabric
on straight bar knitting machines, substantially as described and illustrated in the
Drawings annexed.