Improvements in Narrowing and Widening Mechanism used in Straight Bar Knitting Machines.
Year: 1891

page_text: Date of Application, 6th Mar., 1891
Complete Specification Left, 29th Sept., 1891-Accepted, 31st Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Narrowing and Widening Mechanism used in
Straight Bar Knitting Machines.
We, JAMES HENRY WOODWARD and FREDERICK SHAW both of Lee Works,
Nottingham Hosiery Machinists, do hereby declare the nature of this invention to
be as follows :-
:-
In straight bar knitting machines as now made the two sets of narrowing points
are carried by two parallel bars each capable of being moved end wise and one of
them acted on by a racking arrangement at one end of the machine and the other
by a duplicate racking arrangement at the opposite end of the machine.
According to our invention we cause opposite sides of a pinion wheel to gear
with racks fixed upon two parallel shafts connected with the two bars but further
apart from each other so that we are able to use a large pinion and have several
teeth in gear at once. In this way when one bar is inoved in one direction the
other is correspondingly moved in the opposite and we cause one bar only to be
acted upon at its end by an automatic racking arrangement no duplicate racking
arrangement at the opposite end being required.
Dated this 6th day of March 1891.
CARPMAEL & Co.,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Narrowing and Widening Mechanism used in
Straight Bar Knitting Machines.
We, JAMES HENRY WOODWARD, and FREDERICK SHAW, both of Lee Works,
Nottingham, Hosiery Machinists, 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 :-
In straight bar knitting machines as now made the two sets of narrowing points
are carried by two parallel bars each capable of being moved endwise and one of
them acted on by a racking arrangement at one end of the machine and the other
by a duplicate racking arrangement at the opposite end of the machine.
According to our invention we cause opposite sides of a pinion wheel to gear with
racks connected with the two bars but further apart from each other so that we are
able to use a large pinion and have several teeth in gear at once. In this way when
one bar is moved in one direction the other is correspondingly moved in the
opposite and we cause one bar only to be acted upon at its end by an automatic
racking arrangement no duplicate racking arrangement at the opposite end being
required.
Figure 1 is a front view and Figure 2 a side elevation of narrowing and widening
mechanism constructed as above described.
E is the ordinary narrowing machine shaft by which the point bars C C' are
carried the shaft itself is supported in bearings carried by arms K' from a rock
shaft K in the usual manner- is an arm on the shaft E and I' a rod descending
from it by which the shaft E is rocked and raised or lowered as required in the
ordinary manner.
GG are two brackets fixed upon the shaft E.
bracket to the other and carrying a pinion H.
G' is a bar passing from one
O are two toothed racks one
gearing into the pinion H at the bottom and the other gearing into it at the top.

page_text: The rack O is fixed to a slide F which can slide end wise to and fro along the
shaft E and is secured to the point bar C.
The rack O' is fixed to rod D which can slide endwise through the brackets G G¹
and is secured to the point bar C¹. The rod D is for this purpose secured to a
slide A which can slide freely along the shaft E and the slide A¹ is by an arm B
attached to the point bar.
A projection A upon the point bar C¹or the slide A'may be actuated by a screw,
jacquard or step wheel in any ordinary way.
When the point bar C₁ is moved end wise in either direction the rod D and
toothed rack O¹ move with it and by the pinion II the toothed rack O and point
bar C are moved correspondingly in the opposite direction. J Jare points carried
by the point bars C and C¹.
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. Connecting the two point bars of the narrowing and widening mechanism used
in straight bar knitting machines to two racks parallel with them but at a greater
distance apart and making a pinion at one point of its circumference to gear with
one rack and at the opposite point of its circumference to gear with the other
rack.
2. The construction of the narrowing and widening mechanism used in straight
bar knitting machines substantially as hereinbefore described and illustrated in the
drawing annexed.
Dated this 28th day of Sentomber 1801
J. H. WOODWARD.
FREDERICK SHAW.