Improvements in or relating to Knitting Machines.
Year: 1890

page_text: Date of Application, 16th Aug., 1890
Comple'e Speci cation Left, 16th May, 1891-Accepted, 26th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Knitting Machines.
We, THOMAS GADD and JOHN MARRIOTT, trading under the style of
Gadd & Marriott of Erskine Street, Leicester, Hosiery Machine Builders, do
hereby declare the nature of our invention to be as follows:-
This invention has reference to knitting machines and embodies improvements
specially applicable to circular ribbed heads such as may be employed in the
production of sleeves for Cardigan jackets and for other purposes.
The object of the invention is to apply to such machines apparatus of an
improved kind to effect more certainly than heretofore the production of sound and
perfect fabric.
On the upper part of the machine or ribbing head as at present constructed there
is mounted a horizontal ratchet wheel and pawl operated through. suitable
intermediate mechanism, from the driving shaft.
The ratchet wheel has fixed on its upper face a number of cam plates or cam
surfaces which during the revolution of the machine actuate a lever connected to
the clearing cam to render the latter periodically inoperative as regards its action
upon the ribbing needles thereby allowing such needles to accumulate their loops at
certain courses to form tuck stitches to vary the pattern of the cuff and border of
Cardigan jackets and other fabrics.
Instead of the ratchet wheel and pawl before mentioned, we mount on the upper
part of the machine a horizontal worm wheel actuated by a worn on a shaft at a
right angle thereto and carrying on one end a mitre or bevel wheel gearing with a
similar wheel at the upper end of a vertical shaft or spindle operated in the well
known manner.
In the manufacture of sleeves for Cardigan jackets and the like the bevel or
mitre wheel before mentioned can be thrown into or out of gear by a clutch or
equivalent means, when it is desired to knit the cuff portion of the sleeve.
Dated this 16th day of August 1890.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Knitting Machines.
We, THOMAS GADD and Joux MARRIOTT, trading under the style of
Gadd and Marriott of Erskine Street, Leicester, Hosiery Machine Builders, 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 has reference to circular knitting machines especially such as are
employed in the manufacture of sleeves for knitted jackets or of other tubular
fabrics composed partly or wholly of tuck or multiple loop stitches and the object
of the invention is to apply improved mechanism to operate in conjunction with the
rotary head of a circular ribbed knitting machine to ensure the production of
perfect fabric.
The invention will be understood from the following description in reference to
the accompanying drawings wherein
Figure 1 is a back clevation, Figure 2 a side elevation and Figure 3 a plan of our
Pains 6d l

page_text: improved mechanism applied to a circular ribbed head, only so much of the latter
being shewn and hereinafter described as is necessary to illustrate the invention.
A represents the rotary head carrying the jacks B (Figure 1) to which are
soldered the horizontal ribbing needles B which rotate successively past the clearing
cam C and are thereby moved sufficiently far outwardly to enable the loops to pass
off the latches of the needles.
When Cardigan jacket sleeves or other tuck stitch or multiple loop fabrics are
being formed the loops are retained on the latches of the needles for one or
more courses and when the needles subsequently clear, the accumulated loops form
tuck stitches.
In order to produce the latter, the clearing cam C fixed to the end of the welting
lever is partly withdrawn or moved nearer to the centre of the machine so
that the outward stroke of the needles C is reduced and the loops are not allowed
to clear.
This is usually effected by cam surfaces E periodically raising the upper end of
the welting lever D pivotted at D' to the spindle D' and thereby partly withdrawing
the cam C, as before explained.
The cam surfaces E have usually been fixed upon a horizontal ratchet wheel, but
the action of the latter has been uncertain and imperfect fabric the result.
According to our invention we carry the cam surfaces E upon the upper face of
a worm wheel F and the latter is operated by a worm or endless screw F¹ fixed on
a horizontal spindle G carried in bearings in a bracket G³ secured by screws G³
to the rotary head A.
The spindle G is operated by a mitre wheel H carried on the end thereof and
gearing with a similar wheel H on the upper end of the usual vertical spindle J on
which is mounted the toothed wheel J which drives the rotary head in the well
known manner.
The gear wheels H and H' are placed in and out of gear through the medium of
a slotted plate K loosely pivotted at K¹ to the hand lever L which is likewise
movably secured by a screw L to the usual jack band M.
The spindle J passes through the slot in the plate K and the boss H2 of the gear
wheel H rests upon the upper surface of the plate K which is inclined so that upon
the latter being moved forwards and backwards by the lever L the wheel H¹ will
be raised and lowered to be placed in and out of gear with the wheel H.
The plate Krests and moves upon the upper face of a bracket N secured by
screws N to the rotary head A.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
1. In a circular ribbed knitting machine the combination of a worm wheel such
as F carrying cam surfaces E and operated by a worm such as F¹ substantially as
and for the purpose described and illustrated in the accompanying drawings.
2. In a circular ribbed knitting machine the combination with a worm wheel
such as F carrying cam surfaces E operated by worm such as F of gear wheels
such as H, Hplaced in and out of engagement by a slotted plate such as Kand
haud lever such as L substantially in the manner and for the purpose described and
illustrated in the accompanying drawings.
Dated this 16th day of May 1801
THOMAS GADD.
JOHN MARRIOTT.
W. P. Thompson & Boult,
Agents for the Applicants.