IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRAWING, COMPRESSING, AND REDUCING THE DIAMETERS & THICKNESSES OF STEEL, IRON, & OTHER METALLIC TUBES OR BARS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
JOSEPH SHORT, 220 Great Lister Street, Birmingham, in the County of Warwick,
trading as an Oil Merchant, do hereby declare the nature of my invention for
IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRAWING, COMPRESSING, AND
REDUCING THE DIAMETERS & THICKNESSES OF STEEL, IRON, & OTHER METALLIC
TUBES OR BARS, to be as follows:-
My invention consists of a rotating die A. Fig 1. or dies, through which the
tube B is drawn or pressed, during the rotating action of the die, The die is fitted
into the die holder C, which is a tangent wheel rotated by a worm D, and driven
by a band H, chain, spur, or other gearing, The bracket E, Fig 2. is the wheel
holder, into which frictional rollers F, are fitted, and against which the die holder
revolves during the process of drawing the tube, The mandrill & which is used
to support the tube is of ordinary construction, I do not limit myself to one die
only, tangent wheel, worm, bracket (or die holder) and gearing in drawing tubes
as berein described and illustrated, as the same may be doubled or more extended
in number, and used simultaneously if required, without departing from the nature
of my invention, but I claim as my invention, the rotating die, or dies during the
act of drawing the tube, or other body, and reducing the diameters and thicknesses
of tubes.
:

page_text: COMPLETE SPECIFICATION.
I, JOSEPH SHORT of 220, Great Lister Street, Birmingham, in the County of
Warwick, Oil Merchant, do hereby declare the nature of my said invention for
"AN IMPROVED APPARATUS FOR DRAWING TUBES OR BARS," and in what manner
the same is to be perforibed, to be particularly described and ascertained in and
by the following statement reference being had to the accompanying drawing |
forming part of this specification:
My invention relatos to improved machinery or apparatus for drawing, com-
pressing and reducing the diameters and the thickness or substance of steel iron
and other metallic tubes, bars or shafting; and the object of my invention is to
produce a simple and efficient apparatus for this purpose.
My invention consists in the novel combination and arrangement of the parts
constituting my improved machinery or apparatus. The said apparatus consists
of a worm-wheel formed with or secured to a central socket or tube the said socket
or tube, forming the die-holder, in which a suitable die is keyed or otherwise
secured. The said worm-wheel and socket are mounted in a suitable bracket or
mounting and the worm-wheel is revolved by means of a worm mounted in the
said bracket tangentially to the said worm-wheel and driven by a band and pulley
or other suitable means. A mandrel of ordinary construction is used to support
the tube during the drawing process. The die employed with my improved
apparatus may have one or more internal convex rings, or bulbs, of different
diameters or bores, suitably corresponding bulbs being formed on the mandrel so
that one, two, or more operations of reduction, compression and consolidation of
the metal passed through the die may be effected simultaneously. Or any other
form of rotary die suited to the work to be performed may be employed with my

page_text: a suitably corresponding bulb G¹ is used for supporting the tube H. The mandrel
is stationary, the tube has a longitudinal movement in the direction of the arrow
(Figure 2) and as the worm-wheel is revolved the rotation of the die F compresses,
reduces and draws the tube H supported upon the mandrel G.
The die F may be provided with two or more convex rings or bulbs and thus
two or more drawing operations may be effected simultaneously. Figure 3 shows
a double die, that is to say a dio having two internal convex rings or bulbs F11 and
F the diameter or boro of the bulb F being smaller than that of the bulb F¹.
Suitable corresponding bulbs G¹ and G" are formed on the mandrel G and the said
bulbs are made of such diameter as to effect, in conjunction with the bulbs F" and.
F of the die, the desired reduction in the bore and thickness or substance of the
tube. The tube has a longitudinal movement in the direction of the arrow, tho
mandrel being stationary, and the diameter of the bulb G" of the mandrel and of
tho die at F being less than that of the bulb G₁ and the die at F1, by the
rotation of the die a doublo drawing process is accomplished at one operation.
My improved apparatus is adapted for the drawing of tubes, bars or shafting,
and any other form of rotary die than those above mentioned may be employed
with my improved apparatus; and two or more of the said apparatus may be
employed simultaneously or in conjunction with each other (the tube bar or
shafting passing from one apparatus to another) or they may be used sub-
sequently.
Having now particularly described and ascertained the naturo of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
First-In a machine or apparatus for drawing metallic tubes, bars or shafting,
the combination of the worm-wheel A having socket or dio-holder B, worm E,
friction rollers D, and bracket or other suitable mounting O with the die F and
mandrel G substantially as set forth.
Second. In a machine or apparatus for drawing metallic tubes, bars or shafting
the combination of the worm-wheel A having socket or die-holder B worm E,
friction rollers D and bracket or other suitable mounting C with any rotary die of
suitable form for the purposes set forth.