Improvements in or connected with Machinery or Apparatus for Swaging Wire Spokes and the like.
Year: 1898

page_text: Date of Application, 25th Jan., 1898-Accepted, 16th Apr., 1898
COMPLETE SPECIFICATION.
Improvements in or connected with Machinery or Apparatus for
Swaging Wire Spokes and the like.
I, JAMES YATE JOHNSON, of 47, Lincoln's Inn Fields, in the County of London,
Gentleman, do hereby declare the nature of this invention (which has been
communicated to me from abroad by William George Allen, of Hartford,
Connecticut, in the United States of America, Machinist) 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 increase the durability and efficiency of machines
for swaging wire, such for example as machines for making wire-spokes.
In swaging-machines the rapid and violent strokes on the dies quickly produce
wear and damage to various parts of the mechanism which wear and damage are
found to be greatest at the time at which there is no stock between the dies, when
the said dies are loose, and the strokes of the driving cam cause great concussion and
rapid injury.
The present invention includes means whereby the dies are automatically moved
and held out of contact with the driving cam while they are not acting upon the
stock, so that the wear is confined to the time when the dies are actually operating
on the stock, and therefore when the wear is at a minimum.
It has been found that the chucks ordinarily used in machines of this description
do not grip the slender wire as tightly as is necessary to effectually prevent slip and
insure proper action. The invention embraces an improved chuck which accomplishes
this result and is attended with other advantages as hereinafter explained.
The several features of this invention will be best understood by reference to the
accompanying drawings, wherein is illustrated what has been found to be a practically
successful embodiment thereof in a swaging machine.
Figure 1 is a plan of the machine; Figure 2 is an elevation of a portion of the
machine as seen from the right hand side of Figure 1.
Figure 3 is a plan of Figure 2 parts being omitted to shew the locking device for
the carriage or slide;
Figure 4 is the bracket in which the latch for locking the carriage is pivoted;
Figure 5 is a longitudinal vertical section and Figure 6 is a longitudinal
horizontal section through the chuck for holding the wire during the swaging
operation;
Figure 7 is an end view of the chuck as seen from the left hand side of
Figure 5;
Figure 8 is an end view of the chuck-jaws;
Figures 9 and 10 are details of the toggle-levers for operating the chuck jaws;
and
Figure 11 is an elevation of the swaging mechanism as seen from the left hand
side of Figure 1.
A² represents the main driving shaft, K¹ the bed of the machine, and K a frame
supported by the bed in which frame the parts of the swaging mechanism are

page_text: longitudinal slots in the sleeve and fitting tightly in a transverse opening in the
bar O. The collar Q has a peripheral groove q¹ into which projects a pin on a
lever R pivoted at one side of the carriage and having its free end extending into the
path of stops hereafter referred to. The lever R has on its underside a tooth 1
(see Figures 1 and 6) adapted to be engaged by a spring catch 2 to hold the
chuck jaws either in an open, or a closed, position.
T is a rod mounted to have a limited sliding movement in bearings t t on the
frame K, the said movement being imparted thereto by a lever T¹ pivoted at t¹
engaging at one end between fixed collars on the rod and at its other end carrying
a pin projecting into the cam groove p of the wheel P.
t2 and 13 are stops on the rod T in the path of the lever R, the stop t², for effecting
the closure of the chuck jaws, being fixed, and the stop t³, for effecting the opening of
the chuck jaws, being adjustable on the rod by engagement with a screw thread
formed thereon, the point at which it is desired to open the chuck, to release the
stock, being dependent upon the length of the stock, which may be variable.
The closing of the jaws against the stock is effected by a quick jerky movement
transmitted thereto from an offset in the groove p of the wheel P by the means
described. It is of importance that the carriage, at this time, be held in an
absolutely fixed position, as any slight movement thereof may have the effect of
causing too short a grip being taken on the stock. To prevent this, means are
provided for momentarily locking the carriage, such means consisting of a latch U
pivoted at u to a bracket U¹ adjustably secured to the frame K. The latch has at
one end a roller u held in contact with the periphery of a disc U2 on the shaft R¹
through the action of a spring u². The disc U as a depression u³ in its periphery,
into which the roller u¹ drops during the rotation of the disc thereby lowering the
free end of the lever U into engagement with a recess ut formed in the edge of
a block u secured to the carriage, thereby locking the carriage so long as the roller
runs in the depression.
Referring now to the means for ejecting the work from the chuck after the swaging
has been completed, x is a rod extending from the plunger m² (Figure 5) at one end
of the sleeve M through the spring m³ a perforation in the dise m³, a longitudinal
central opening through the bar and parts associated therewith, its free end
terminating (in the normal position of the rod) close to the chuck jaws. Y is an
overhanging support on the carriage L to the outer end of which is pivoted an arm y
the free end of which extends to a position in front of the projecting end of
plunger m². The swinging movement of the arm y is limited by a stop y¹ secured to
the support Y. z is a stop on the rod Tadapted to make contact with the arm y as
the carriage reaches the limit of its travel, causing the arm to press the plunger
inward against the tension of the spring m³, sliding the rod x forward so that its
outer end passes between the chuck jaws and ejects the work.
In its position of rest the forward end of the rod x acts as an adjustable stop to
determine the length of stock introduced between the chuck jaws, the adjustment
being effected by screwing the plug m¹ in or out.
The operation of the machine is as follows:-A length of stock to be swaged is
passed between the swaging dies and between the jaws n n of the chuck until its end
abuts against the end of the rod x which has been adjusted to the proper position in
accordance with the length of the stock, as already described. At this instant, the
carriage, being locked by the latch U, an offset in the groove p of the wheel P
imparts a quick movement to the lever T reciprocating the bar T and swinging the
lever R to the right (Figure 1) moving the bar O in a corresponding direction and
closing the jaws tightly against the stock, in which position the spring catch 2 rests
on the left hand side of the tooth r¹ on the lever R, Figure 1. The roller w¹ now
drops into the shallow part of the cam W¹ lifting the wedge w² out of engagement
with the projection v and permitting the cam wheel G to vibrate the slide gl.
At the same time the latch U is lifted out of engagement with the slot u4 and the
This
movement. of the carriage by the cam wheel 12 and lever L¹ commences.
movement of the carriage continues until the lever R arrives in front of the stop t³ at