Improvements in Wire-drawing Drums.
Year: 1890

page_text: Date of Application, 23rd Sept., 1890-Accepted, 25th Oct., 1890
COMPLETE SPECIFICATION.
Improvements in Wire-drawing Drums.
We, WILLIAM WATTS SHEARER, Pattern Maker, and FREEBORN STANTON LEWIS,
Real Estate Agent, both of Port Angeles, Clallam County, Washington, United
States of America, 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 :-
Our invention relates to wire-drawing drums so-called, the object being to do away
with the draw-bar and pincers now in use by the substitution of a chain-sheave, chain,
and automatic pincers, the chain-sheave being attached to the shaft or spider on the
inside of the drum and revolving with it in such a manner as to draw the wire from
the die to the drum by a continuous motion, and also to hold the wire during the
entire drawing process, thus doing away with all present devices for holding the wire.
A further object is to avoid the waste now occasioned by the frequent application of
the pincers now in use in drawing the wire from the die.
By the present method the wire is taken from the die by means of pincers attached
to a draw-bar operated by means of an eccentric. From two to three motions of the
draw-bar and as many applications of the pincers are required in order to draw enough
wire to wrap around the drum and attach it to the vice. By means of our invention
the wire is seized at the die by the automatic pincers attached to a chain or wire rope
which is secured to the sheave within the drum. Power being applied, the chain
sheave revolves independently of the drum and draws the chain and pincers holding
the wire, entirely within the drum through an opening in the side thereof. The drum
is then set in motion by the long arm of the spider coming in contact with a lug on
its inner circumference, thus drawing the wire from the die and attaching it to the
drum with one continuous motion.
Reference is to be had to the accompanying drawings, forming part of this Specifi-
cation, in which
Figure 1 is a plan view of the chain sheave attached to the spider, chain, and
pincers drawing wire from the die, as applied to the wire-drawing drum patented by
Letters Patent of the United States of America dated December 7th 1886,
No. 353,975.
Figure 2 is a vertical section through the drum and spider, shewing the working
parts under the drum and the attachment of the chain-sheave to the spider and pincers
in position for taking wire from the die, (the pincers in both figures are shewn at
double the scale of the other parts, in order to more plainly exhibit the mechanism of
their construction).
Figure 3 shews the knuckle joint for closing the pincers, with the chain
attached.
Figure 4 is a plan view of the drum and spider, shewing the lug cast on the
inside of the drum, by means of which the drum is set in motion when the chain and
pincers are drawn wholly within the same.
Figure 5 is a side or edge view of the annular drum, shewing the portion of its
periphery provided with a notch or open slot through which the pincers draw the end
of the wire prior to the drum being set in revolution.
Similar letters of reference indicate corresponding parts in all the figures.
A indicates the sheave or grooved wheel on which the wire-drawing chain B is
wound. Said sheave is keyed fast on the same shaft a that carries the spider G. The
arms of the pincers D (shewn enlarged) are connected by toggle links
pp and the
chain B is attached to the knuckle or hinge joint E of the latter, as shewn in
Figures 1 and 2. The wire w being gripped by the pincers D is drawn with them
through its peripheral notch N (Figure 5). The tractive force required for this

page_text: operation is applied by the chain B which winds on the sheave A when the latter is
rotated along with the shaft a. The rotation of the latter also carries with it the
spider G whose longest arm e then comes, in contact or engagement with a lug L
(Figure 4) formed on the inside of the rim of the wire drum. The shaft α, sheave A,
spider G, and the drum, continuing to rotate together, the wire is drawn through the
die and wound on the drum, as will be readily understood..
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ;
1. The combination, with the wire-drawing drum having a notch in its periphery
of the chain sheave A contained within said drum and rotating independently thereof
and the chain attached to the sheave and pincers, as shewn and described.
2. The combination, with the wire-drawing drum having its rim provided with a
notch and lug, as specified, of the chain sheave A and spider G both contained within
the drum and rotating together independently of the drum, the spider having an arm
which engages said lug, and the pincers and chain attached to the sheave, all as shewn
and described.
Dated this 23rd day of Santambes 1900.
W. W. SHEARER.
F. S. LEWIS.
By A. M. & Wm. Clark,
.53, Chancery Lane, London, Patent Agents.