Improvements in the Construction of Cam Rings for Knitting Machines.
Year: 1893

page_text: Date of Application, 4th Sept., 1893-Accepted, 7th Oct., 1893
CUMI LEID DEPUT
Improvements in the Construction of Cam Rings for Knitting
Machines.
I, LOUIS NAPOLEON DEVON WILLIAMS of 2077 Great Cumberland Street in
the City of Philadelphia State of Pennsylvania United States of America,
Manufacturer of Knitting Machinery 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 :-
My invention relates to certain improvements in knitting machines in which the
cam ring is provided with a removeable segment or where the entire ring is divided
into a number of segments, and its object is to so construct the cam ring that the
segment or segments may be readily removed when it becomes necessary to gain
access to the needles on any portion of the needle cylinder to make examinations or
repairs.
In the accompanying drawings-
Figure 1, is a sectional elevation on the line 1-1, Figure 2 of sufficient of a
circular knitting machine to illustrate my invention:
Figure 2, is a plan of the cam ring and its supporting gear, and
Figure 3, is a detached perspective view of one of the cam segments.
A represents the base of an ordinary form of circular knitting machine of small
diameter to which is secured the needle cylinder (not shewn). The base is
provided, as usual, with a circular guideway for a cam ring Chaving cams for
actuating the needles of the cylinder, and provided with bevel gear C₁ with which
engages a driving pinion for rotating it.
In the accompanying drawings all unnecessary portions of the machine irrclative
to the invention have been omitted for the sake of clearness.
The present invention is designed more especially for use in connection with
machines of small diameter, such for instance as those used for knitting stocking
tubes, and the cam ring is shewn as divided into but two segments, although the
number may be increased to any desired extent. The invention is also applicable
to machines of larger diameter such as those used for the manufacture of shirt
bodies and the like. The cam ring is divided into any desired number of segments c,
(two in the present instance,) which form, when in position, a continuous circular ring.
Each section may be removed from its position without disturbing the other
section or sections, and each is independently secured to a base ring D, preferably
formed integral with the bevel gear C¹. Secured to, or formed integral with, these
segments are the upper sections of the operating cams, that is, that portion of
the cam above the groove traversed by the needle bits, and this portion of the cam
moves in a vertical direction with the segment of the cam ring to which it is
attached when the latter is removed, and the needle bits, being below the section c¹
of the cam, will not interfere with this upward movement. That section c² of the
cams, below the path of the needle bits, is separate from the main.cam ring, and
when the latter is removed, the section c² may be moved out into the space left
between the base ring D, and the needle cylinder, or, in some cases it may not be
necessary to move it from its normal position. These lower sections of the
operating cams are held to the segments c by screws d which extend through the
base ring, the segments, and the said lower sections e², and it is only necessary to
employ a single screw for each segment, or, where the lower section e² is divided
circumferentially, a screw may be used to hold each section in place.
In Figure I have shewn (at the right hand side) one of the screws d removed,
and the removeable segment it holds, partially raised from its normal position; the
further upward movement will bring the lower edge of the segment above the

page_text: base ring D, and it may then be removed laterally. The lower section c² remains
under the needle bits until the segment is entirely removed and a clear space is left
between the base ring D and the needle cylinder to permit its lateral movement
from under the needle bits. In some cases the orifice made for the passage of the
screw d through the cam segm 'nt may be continued in the form of a slot extending
to the lower edge of the segment as shown in dotted lines in Figure 3, so that to
remove the latter it will merely be necessary to loosen the holding screw d
sufficient to permit the withdrawal of the segment, and afterward the lower section
may be drawn into the space between the base ring and the needle cylinder, by
means of the screw d.
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 :-
First. A cam ring for knitting machines, having a removable segment, operating
came formed in two sections, situated respectively above and below the needle bits and
forming a groove in which such needle bits may travel, the lower of such sections
being detachably connected to the removable segment, and the upper of such
sections being secured to the removable segment, substantially as hereinbefore
specified.
Second. A cam ring for knitting machines, having a removable segment, operating
cams formed in two sections, situated respectively above and below the needle bits
and forming a groove in which such needle bits may travel, the lower of such
sections being detachably connected to the removable segment, and the upper of
such sections being secured to the removable segment, and said cam ring having
also a base ring forming a rear supporting wall for the segment, substantially as
herein before specified.
Third. A cam ring for knitting machines, having a removable segment, or
comprising a series of removable segments, operating cams formed in two sections,
situated respectively above and below the needle bits and forming a groove in
which such needle bits may travel the lower of such sections being detachably
connected to the removable segment and the upper of such sections being secured
to the removable segment, and the said cam having also a base ring forming a rear
supporting wall for the segment and to which it is secured, substantially as herein-
before specified.
Fourth. A cam ring having a removable segment, operating cams formed in two
sections, situated respectively above and below the needle bits and forming a groove
in which such needle bits may travel, the lower of such sections being detachably
connected to the removable segment, and the upper of such sections being secured
to the removable segment, the said cam ring having also a base ring forming a rear
support for such segment, and a securing screw extending through such base ring,
the segment, and the lower section of the operating cam, substantially as herein-
before specified.
1 1
1000
J. H. JOHNSON & Co.,
Agents.