Year: 1887

page_text: Date of Application, 29th Dec., 1887
Complete Specification Left, 17th Sept., 1888
Complete Specification Accepted, 19th Oct., 1888
I, CONSTANTINE DE NEGRI of 68 Stamford Street, Blackfriars in the County of
Surrey, Engineer, do hereby declare the nature of my said invention to be as
follows:-
My invention relates to an improvement in the construction of the cam cap of
Circular ribbing Knitting Machines by which the outthrow cam can be moved into
or out of action at the will of the operator or in other words an improvement in the
construction of welting cam caps.
The lower boss or raised part of the cam plate is made smaller than is usual and
three or more segments linked together surround this boss when the outthrow
cam is out of action, making up the diameter to the usual size.
To explain the arrangement of these segments, if the cam cap is turned cams
upwards, on the left hand side under the stitch cam, which is of the usual kind, the
first segment is pivoted on a pin or screw attached to the plate of cam cap and has
its other end linked to the second segment on its right hand side, which second segment
is again linked to a third one and if three alone be used the third segment will
terminate where the first segment is pivoted. Under the third segment there is a
curved slot cut in the cam plate, struck from centre of plate, passing through which
a pin or screw joins this third segment to a ring on the top or other side of the cam
plate, which ring fits round a boss on top of cam plate and is free to turn (under
present position of segments) in one direction only namely to the right viewed from
same way up.
Now it will be readily understood that if the last named ring is moved from left to right
(say by a lever attached to it) it will move the last named segment in the same direction
and cause the joint between the two first segments to give outwardly the latter taking
the form of & acting in conjunction as an outthrow cam.

page_text: If the curved slot be made just the right length it will restrain the outthrow cam
from going too far and a spring with a point at one end fastened to the top of the
cam cap which point drops into a conical recess made on the ring at either of the two
extreme positions that is when in or out of action, would keep the cam or segments
in whichever position it is or they are put by the operator whilst still allowing that
position to be altered at will.
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1, CONSTANTINE DE NEGRI of 68 Stamford Street, Blackfriars, in the County of
Surrey, Engineer, do hereby declare the nature of my said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by the
following statement:-
My invention relates to improvements in the construction of the cam-caps or
welting-cam-caps of Circular Ribbing Knitting machines and is designed to afford
the means whereby the outthrow cam can be moved into or out of action at the will of
the operator.
My invention will be clearly understood by reference to the accompanying drawings,
in which Fig. 1 is a plan or top view and Fig. 2 a side view of my improved cam-
cap, Fig. 3 is an underside view of my said improved cam-cap with the outthrow
cam out of action and Fig. 4 is a similar view showing the outthrow cam in action.
In Figs. 1&2 a is a ring fitting round the boss of the cam plate c, to which ring
is attached a handle d shewn in dotted lines in another position at d.
In this ring there is a hole through which the screw e is passed; this screw passes
also through the curved slot shown in dotted lines between e and fin the cam-plate c
and then screws into the segment & shown in Figs. 2, 3 and 4.
Referring to Fig. 3 it will be seen that the raised part g of the cam-plate is some-
what smaller than is usual, thus allowing of its usual size being made up by the
segments h, i and k.
The segment is pivoted at a to the cam-plate and is jointed to the seg-1
ment at the said segment i being jointed the segmentat z.
It will be clear, from the foregoing description, that if the handle d Fig. 1 be
moved into the position shown in dotted lines at d, it will carry round with it the
ring a which will in turn push the screw e from its position e to Fig. 3 carrying

page_text: with it the segment, k which in this movement will force outward the two segments h
and into the positions assumed by them in Fig. 4 forming themselves into a suitable
outthrow cam.
It follows, moreover, that, when the handle d is moved from the
position shown in dotted lines at d'and returned to its place at d, it will pull back
the outthrow cam and once more arrange the segments closely round the raised
part g
In Figs. 1 and 2 I have shown an arrangement for keeping the ring a and conse-
quently the segments, in either of their two extreme positions, which may be done by
the spring
m pressing a conical point m into one or other of two conical recesses,
provided in the top of the ring at o or under n Fig. 1.
It is obvious that I can modify the construction of the segments without departing
from the nature of my said invention and that I can, if desired, use other means than
those above described for effecting the adjustment of the said segments as, and for the
purpose herein above described.
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 :-
1st. The segments arranged around the raised part on the underside of a cam-
cap and adjustable as herein before described for the purpose of either actuating
or leaving inert the ribber needles at the will of the operator.
2nd. The improved welting cam-cap consisting of the parts constructed and com-
bined substantially as described with reference to the accompanying drawing and
adjustable as and for the purpose above specified.