Year: 1888

page_text: 1 WILLIAM ALLEN MCCOOL, of Beaver Falls, in the County of Beaver and State of
Pennsylvania, United States of America, Machinist, 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 :-
The object of my invention is to provide a machine for drawing metals in which the
centre of the die, the grip, and the centre of the pins in the two chains, is on a direct
line with draught, the dranght being a centre one, thus making it full, even and
uniform on the working parts of the machine.
One form of my improved machine is shown in the accompanying drawings,
in which,
Figures 1 and 1 is a side elevation.
Figures 2 and 2ª is a top plan, and
Figures 3 and 4 are enlarged views of my improved grip, the grip being closed in
Figure 3 and opened in Figure 4.
Same letters indicate similar parts in the different drawings.
A, is, a supporting frame for the driving mechanism. B, is the stand which
supports the dic. Between A and B runs a box or tunnel, C, on top of which is the
track D, and through which pass the two drawing chains, E, E, upon their return
motion. The carriage, F, mounted upon rollers c, c, carries the grip, G, and is
adapted to roll along the track D, when it is drawn by the chains, E, E, into one of
whose links the hooks or pins, H, are dropped.
The driving mechanism consists of a suitable set of interlocking gear, I, mounted
upon suitable shafts, journalled in the frame, A, receiving motion from a source
of power not shown, and communicating it to the main wheel, J, on the shaft, d,
upon which is mounted a cog-wheel, K, the projections of which in their revolution
engage the successive links of the chains in the manner usual to chain pumps and
gear. Similar wheels K' at the other end of the tunnel, C, serve to hold the chains con-
tinually tant. The entering guide, L, Fig. 2 contains four rollers, F, Figs. 1 & 2 suitably
mounted therein, and between these rollers the metal is passed from the die, and thence
into the grip. The guide is supported by being screwed to the support, B, by bolts, 9, 9,

page_text: and a die, M, of any desired character, is made stationary on the top of said support just
in front of the entering guide and on a line with the grip. The grip is substantially of
the form shown in Figures 3 and 4, in which the case N, has a shelving mouth, the
inclined edges of which correspond to similar inclines on the movable jaws, P, P.
These jaws are pivoted together by the pivot, 9, and are adapted to be thrust forward
so as to project partly from the mouth of the case, N, in which case the jaws are
closed by the action of the inclined edges referred to, under the action of the cam O,
which is turned by means of the handle W. It is obvious that when the cam 0 is
turned into the position shown in Figure 3, the jaws are thrust as far forward as
possible and the grip is at its strongest. When the handle is in the position shown in
Figure 4, there is no pressure upon the jaws, which, therefore, are thrown back by
the spring, S, coiled around the shaft, U, and are thrown open by the resilient force
of the spring, j, thus releasing the metal rod U.
Obviously any intermediate position of the handle, W, and cam, O, will give
a corresponding tension upon the jaws and regulate the grip upon the metal.
The operation of my improved drawing machine will, 1 think, be obvious without
further explanation to all who are familiar with drawing machines. The line of
draught being the centre one, and the parts used in producing the drawing motion
being on a direct line with the draught, the centre of the die, the grip, the centre of
the pins in the two chains, &c., so that when the strain of pulling a bar of metal takes
place, they make the pull even and alike on all working parts of the machine.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
-
1st. The above described drawing machine provided with a die, a grip, and chains
for imparting motion to said grip, so combined and arranged that the centre of the
die, the grip, and the centre of the pins in the chains, is on a direct line with
draught, as herein described and for the purpose specified.
2nd. The combination of the within described grip consisting of the jaws, P, P,
inclosed in a box and adapted to be closed and held together under the control of a
cam and to be thrown back and apart by springs, in a drawing machine for drawing
metals which consists of two drawing chains, one on each side of the carriage which
supports the said grip; mechanism for imparting steady and uniform motion to said
chains and pins, or other devices for connecting said carriage with each of said chains
substantially as and for the purpose described.
3rd. A machine for drawing metals which consists of two drawing chains, one on
each side of the carriage, which supports the grip; mechanism for imparting steady
and uniform motion to said chains or pins, or other devices for connecting said
carriage with the said chains, substantially as and for the purpose described.
גשומ
01 1000
WILLIAM A. McCOOL.
Haseltine, Lake & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.