Improved Apparatus Applicable to Straight Bar Knitting Machines.
Year: 1889

page_text: Date of Application, 19th Sept., 1889
Complete Specification Left, 18th July, 1890-Accepted, 23rd Aug., 1890
PROVISIONAL SPECIFICATION.
Improved Apparatus Applicable to Straight Bar Knitting Machines.
WO WILLIAM HENRY REVIS, AMBROSE BREWIN and JOSHUA MARRIOTT Goldsmith
Street Works Nottingham Machinists do hereby declare the nature of this invention
to be as follows:-
In addition to the bevel wheel on the main cam shaft driving a bevel wheel twice
its size on the draw cam shaft we employ a wheel on each shaft of equal size.
The additional wheel on the main cam shaft has recesses in its boss to allow an
additional clutch boss to engage with it.
The clutch boss driving the usual bevel wheel and the additional clutch boss are
each provided with a groove to admit a fork, each fork being carried by a slide bolt.
worked by a toothed ratchet wheel and a step wheel actuated by the studs on a
pattern chain.
When the ordinary course has been drawn and has taken the first thread layer to
the end of the needles its bar is locked in the ordinary way, the usual bevel wheel
on the main cam shaft is placed out of action and the additional bevel wheel placed in
action the drawing cam being moved back at twice the ordinary speed which draws
the slur boxes back while the machine is dividing its loops on the needles the boxes
remaining back until the course is completed, then the second thread layer bar is
brought into operation, and at the end of its traverse, it is locked in the same way as
the first thread layer bar.
The ordinary bevel wheel is thrown out of action and the additional one put into
action to traverse the slur hoxes back as before described in position for the third
thread layer bar.
By the above means we can make any single course stripe and employ any number
of thread layer bars according to the pattern required. And at each end of the
machine in front of the usual narrowing scrow we employ an additional slide box
carrying a frame traversed by the ordinary narrowing slide.
The additional slido box is provided with a ratchet wheel and two cam wheels.
The inner end of the frame has an axle on which a truck is traversed on to either
cam by a stud projecting from the side of a ratchet wheel on the ordinary narrowing
screw operating a link connected to a rocking lever which clips the truck, the truck
being held on to either cam by an incline plate secured to the framing of the machine.
The axle of the ratchet and cam wheels carries the boss of a slotted lever in which
the axle of the ratchet driver is adjustable.
The front end of the axle is connected by a link to a truck bearing lever operated
by a cam on the usual cam shaft.
Above the additional slide box is a sliding bracket the upper side of which carries
a sliding bolt provided with an arm which is clipped by a fork secured on the lower
narrowing rod for the left selvedges.
The arm for the right selvedges is clipped by a fork secured on the upper narrowing
rod at the right end of the machine.
Each sliding bolt is traversed outwards by a circular flanged cam provided with a
toothed stop wheel and a toothed ratchet wheel, moved tooth by tooth by a driver
hinged to a lever rocking on the axle of the cam and operated by an arm carried
by the upper end of the link before named.
By the above described apparatus we are enabled to make two parallel rows of
narrowings on each side the foot of hose or half hose and to make each pair of
narrowings terminate in a point.
Dated this Eighteenth day of September 1889.

page_text: COMPLETE SPECIFICATION.
Improved Apparatus Applicable to Straight Bar Knitting Machines.
We WILLIAM HENRY REVIS, AMBROSE BREWIN & JOSHUA MARRIOTT, Goldsmith
Street Works, Nottinghaui; 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 :-
When making fabric on straight bar knitting machines, in which it is desired to
introduce single course stripes, the usual method of producing such stripes is, after
drawing the course, to lock the thread layer bar which has laid the thread & to bring
back the slur-boxes to the position they occupied previously to laying the thread by
allowing the machine to go through all the motions necessary to make another course,
except the laying of the thread, or in other words by making what is called a silent
course. To make eno single course stripe by this method requires the time occupied
in making two ordinary courses. The object of our invention is to bring back the
slur-boxes, which have traversed the thread layer bar & laid the thread for the
formation of a course to the position they occupied previously to laying the thread,
immediately after the completion of their traverse & whilst the machine is dividing
& knocking over the loops, thus avoiding any loss of time between the formation of
one single course stripe & the succeeding course. By these means & with a suitable
arrangement of locking bolts we are enabled to move the same slur-boxes by one
draw cam so as to drive from either end of the divisions any of a number of thread.
layer bars required to produce a given pattern composed wholly or in part of single
course stripes without loss of time.
Figure 1. Sheet 1, is an elevation shewing the mechanism of our invention &
Figure II. Sheet II is a plan of the same. In both figures A is the usual bevel
wheel on the main cam shaft B, which drives a bevel wheel A. 1, twice its size on
the draw-cam shaft C. When making plain fabric or fabric composed of stripes of
an even number of courses, the bevel wheel A remains in constant connexion with
the bevel wheel A 1, except during the process of narrowing & causes the draw
can A2, (shewn only in Fig. 1), to traverse the slur boxes backwards & forwards
on the slur cock har at regular intervals. When, however, it is desired to make a
single course stripe, we lock the thread-layer bar immediately after it has laid its
thread & throwing the bevel-wheel A in the main cam shaft out of operation & the
additional bevel wheel D, (which is twice the size of the bevel wheel A), on the
main cam shaft into operation by the means hereafter described, we reverse
the motion of the additional bevel wheel D. 1. on the draw cam shaft C & traverse
back the slur boxes to the position they occupied before laying the thread for a
course at double their usual speed. The speed at which this back traverse of the slur
boxes takes place enables them to reach the latter position whilst the machine is
dividing & knocking over the loops. The bevel wheel D. is then thrown out of
operation, & the bevel wheel. A thrown into operation as hereafter described & the
slur boxes are traversed for a second course in the same direction as for the first:
The method of throwing the bevel wheel A out of operation & the bevel wheel D
into operation is as follows. Upon an axle E attached to the front rail E 1 of the.
machine we fix a step wheel E 2. provided with & actuated by a ratchet wheel E 3.
This step wheel E 2. is caused to revolve by a clawker E4. engaging with the teeth
of the ratchet wheel E.3. The necessary movements are given to the clawker E 4.
which is attached to a rocking lever F rivetted on the front rail E 1, by means of
a double action cam F1 on the main cam shaft. To the clawker E4 is attached a
stud E5 through which a pin E 6 is passed. The lower end of this pin E6 is pivotted:
to a lever G the rising or falling of which disengages or engages the clawker E4 with
the teeth of the ratchet wheel E3. The movements of the lever G. are regulated
by the studs H. H. on a pattern chain H1. revolving round the pattern wheel H 2,
which is fixed on the side of the front rail E 1. When the end of the lever G. is
raised by the passing under it of one of the stads H. H. the pin E6 is lowered &

page_text: allows the clawker E 4. actuated by the double action cam F 1. to engage twice with
the teeth of the ratchet wheel E3 which moves the step wheel E 2 forward through
the space of one step by two motions. On the circumference of the step wheel 2
rests the truck I of a slide bolt or connecting rod I1. The truck I is held up to the
step wheel 2 by means of a spring K. attached to the fork or lever I & by a counter
cam K1, attached to the usual balance weight K 4. on the draw cam shaft & acting
on a projection K2. on a prolongation K 3 of the fork or lever L2. To one end of
the sliding bolt I 1 is attached a fork or lever L. pivotted to the plate L 1. & engaging
by means of a groove M. with the clutch boss M 1 of the bevel wheel A on the main
cam shaft. To the other end of the sliding bolt I 1. is attached a fork or lever L 2.
also pivotted to the plate L 1. & engaging by means of a groove. M 2. with the clutch
boss M3 of the additional bevel wheel D. on the main cam shaft. When in order to
make a single course stripe it is desired to bring back the slur boxes so as to be in
position to traverse another thread layer bar in the same direction as the last, by the
means before described the clawker E4 is made to engage with one of the teeth of
the ratchet wheel E3. & the truck 1. of the sliding bolt I 1. is brought on to one of
the projections of the step wheel E 2. The fork or lever L. is thus made to shog the
clutch boss M 1 on the main cam shaft & disengages it from the bevel wheel A, which
then ceases to operate the bevel wheel A 1, & throws the draw cam. A 2. out of action.
At the same time the fork or lever L2. attached to the other end of the sliding
bolt I 1, shogs the clutch boss M 3. & engages it with the bevel wheel D by means of
the recess N°1. with which the boss of the latter is provided. The bevel wheel D
then operates the bevel wheel D 1. attached to the draw cam shaft, & the draw cam A 2.
is thus made to reverse its action & to bring back the slur boxes at twice the speed
of their former traverse. The clawker E4 then engages with another tooth of the
ratchet wheel E 3, & the truck I of the sliding bolt 1 1, falls into one of the recesses
of the step wheel E2. By this movement the forks of the sliding bolt L1, are caused
to reverse the actions of the clutch bosses M 1. & M3, & the bevel wheels A & D..
described above namely, the bevel wheel A is thrown into operation, & the bevel
wheel D is thrown out of operation, so that the slur boxes traverse the thread layer
bar in the same direction as before to form the single course stripe. At the other
end of the formation of the latter course another of the studs H. El, in the pattern
chain Hi, is made to raise the lever G& the motions above described necessary to
draw back the slur boxes are repeated between the courses & so on until the number
of single course stripes required are made.
It is to be understood that we do not confine ourselves in our invention to the use
of additional bevel wheels on the main cam shaft & the draw cam shaft of a size
exactly double that of the usual bevel wheel on the main cam shaft, but leave
ourselves at liberty to vary the size of the additional bevel wheels as may be found
convenient.
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. The additional bevel wheels on the main cam shaft & the draw cam shaft & the
additional clutch boss engaging with the additional wheel on the main cam shaft.
2. The sliding bolt & forks operated by the step wheel & moving the clutch bosses
so as to place the two bevel wheels on the main cam shaft in & out of operation &
the step wheel operating the sliding bolt & forks.
3. The transference of the slur boxes from one side of the division to the other
during the interval occupied by the machine in dividing & knocking over the loops.
4. The making of single course stripes in succession, with the same draw cam &
the same slur boxes, without the necessity of making silent courses.
Dated this 17th day of July 1890.
H. W. GOUGH, C.E.,
Agent.