Improvements in Flat or Rotary Knitting Machines.
Year: 1888

page_text: Date of Application, 27th Sept., 1888
Complete Specification Left, 26th June, 1889-Accepted, 27th July, 1889
PROVISIONAL SPECIFICATION.
Improvements in Flat or Rotary Knitting Machines.
I, CHARLES HENRY ALDRIDGE, of Pinfold Gate, Loughborough, in the County of
Leicester, Hosiery Machinist, do hereby declare the nature of this invention to be as
follows
The object of this invention is to enable tuck or misspressed work in various forms
or patterns such as diamonds, squares, vertical stripes &c. to, be produced on flat or
rotary knitting frames.
To effect this 1 mount along the edge of the sinker bar a moveable presser bar
which can be shifted endwise to and fro and which has notches cut away from its
acting edge wherever misspressings are to be produced.
Grooves are also cut across the presser for the edges of the sinkers to slide in.
When the work is being knocked over and the sinkers have been drawn back so that
the edges of their forward ends no longer lie within the grooves cut across the presser,
the presser is shifted endwise a distance by the action of a revolving or other cam or
pattern surface so that at the next course the misspressings tako place upon other
needles. When the presser has been shifted end wise the sinkers again come forward
in time for yarn to be laid across them for forming the next course of work. For
producing vertical stripes of uniformn width the notches in the pressure would be at
equal distances apart and would be of the same width as the intervals between
them.
C. H. ALDRIDGE.
COMPLETE SPECIFICATION.
Improvements in Flat or Rotary Knitting Machines.
I, CHARLES HENRY ALDRIDGE of Pinfold Gate, Loughborough, in the County of
Leicester, Hosiery Machinist, 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 :-
The object of this invention is to enable tuck or misspressed work in various forms
or patterns such as diamonds, squares, vertical stripes &c. to be produced on flat or
rotary knitting frames.
To effect this I mount along the edge of the sinker bar a movable presser bar which
can be shifted end wise to and fro and which has notches cut away from its acting
edge wherever misspressings are to be produced.
If the stripes are of a greater width than the distance between the needles grooves
are also cut across the presser for the edges of the sinkers to slide in.
When the work is being knocked over and the sinkers have been drawn back so
that the edges of their forward ends no longer lie within the grooves cut across the
presser, the presser is shifted end wise a distance by the action of a revolving or other
cam or pattern surface so that at the next course the misspressings take place upon
other needles. When the presser has been shifted end wise the sinkers again come
forward in time for yarn to be laid across them for forming the next course of work.
For producing vertical stripes of uniform width the notches in the presser would be
at equal distances apart and would be of the same width as the intervals between
them.
In the drawing annexed I have shewn apparatus arranged. as above described for
producing vertical stripes of uniform widthso much only of the parts of a knitting
machine are shewn as is necessary for enabling my invention to be fully understood.

page_text: :
Figure 1 is a front elevation and Figure 2 a plan of the parts. Figure 3 is a cross
section of the same together with the needle bar and knocking over hit.
A is the needle bar-B are the sinkers capable of being shifted backwards and
forwards in slots in the sinker bar C-D are the knocking over bits and E is a
moveable presser bar-it is made capable of being slidden to and fro in a slot cut
along the front edge of the sinker bar. At one end it is connected to one arm of a
crank lever F the other arm of which carries a roller G which is made to rest upon
the circumference of a cam wheel H-I is an adjustable stop by which the movement
of the lever F can be limited.
The cam wheel is mounted loosely upon a stud J and has fast with it a ratchet
wheel K. Mounted loosely upon the stud is also an arm L to which a to and fro
movement is given at each revolution of the cam shaft of the machine in any
convenient manner.
The arm carries a pawl M which engages with the teeth of the ratchet wheel and at
each forward movement of the arm turns the cam wheel a distance of one tooth and
thereby shifts the presser bar E end wise a distance equal to the width of stripe to be
formed. In the drawings the notches in the presser bar are shewn to be of a width
to allow of misspressing alternate needles so that the stripes formed are of a width
.equal to the distance from the centre of one needle to the centre of the next.
If broader stripes are to be made the notches in the bar would be further apart and
wider and a correspondingly longer to and fro traverse would be given to the bar by
screwing back the adjustable stop I.
For producing parallel stripes of two different colors two sets of thread layers may
be used alternately for successive courses one course being worked with thread laid on
to the needles by one thread layer and the next with thread of a different color laid
on to the needles by the other thread layer-this may be effected by mechanism such
as is described in the Specification of a former Patent to W. Cotton No. 6088 in the
year 1882.
In order to permit of more than a single mispressing being allowed to take place
whenever desired upon some of the needles the cam wheel may be allowed to remain
at rest for two or even more successive courses of work. To effect this I provide
means for lifting the pawl M out of gear with the teeth of the ratchet wheel K during
the time that one or more courses are being worked. I form the pawl with an
arm M³ extending sidewise from it I also mount loosely upon the stud J a wheel N
over which is passed an endless chain having projections standing up from it at
intervals. The wheel N has fast with it a ratchet wheel O and a pawl P carried by
the rocking arm Lengages with the teeth of this ratchet wheel and turns the wheel Ň
a distance at each forward movement of the arm-As the wheel N turns it carries the
endless chain along with it and whenever one or other of the projections on the chain
comes below the arm M it lifts the arın and thereby raises the pawl M out of gear
with the ratchet wheel K and the cam wheel EI then remains at rest whilst one or it
might be more courses are being worked so that the needles which are then being
mispressed may remain mispressed for one or more further courses instead of for a
single course only.
In this way a great variety of work may be produced.
For producing markings of a diamond form the presser bar is made up of two thin
notched bars one above the other and capable of being shifted to and fro in opposite
directions one to the other.
When plain work is being produced the notches in one plate would be covered by
unnotched parts of the other plate as indicated in diagram No. 1 and the compound
bar would act as an ordinary presser bar-the bars might then be shifted so as to
bring a notch in one to coincide with a notch in the other as in diagram No. 2 and at
the next course two notches in one to coincide with two in the other as in diagram
No. 3 then three with three as in diagram 4 and so on for more courses if required and
afterwards the number of notches coinciding may be gradually reduced until the bar
again works as an ordinary plain presser bar.

page_text: For producing square markings the bar would also be formed of two thin notched
blades, one of which might be stationary and the other moveable.
In the same way notched blades either or both of which are moveable may be used
for producing a great variety of patterns or markings.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The employment in flat or rotary knitting machines of a notched presser bar
composed of one or more notched blades one or all of which can be shifted end wise to
and fro to enable the notches in them to be brought at one course opposite to some of
the needles and at another course opposite to other needles and thereby to produce
tuck or misspressed work in various forms or patterns such as diamonds squares or
others.
2. The combination of mechanism substantially as herein before described for
producing tuck or mispressed work.
Dated this 22nd day of June 1889
C. H. ALDRIDGE.