NEW OR IMPROVED MACHINERY OR APPARATUS TO BE USED IN THE MANUFACTURE OF METALLIC TUBES
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by William Edward Everitt at the
Office of the Commissioners of Patents, with his Petition, on the
4th November 1872.
I, WILLIAM EDWARD EVERITT, of Birmingham, in the County of
5 Warwick, Manufacturer, do hereby declare the nature of the said
Invention for "NEW OR IMPROVED MACHINERY OR APPARATUS TO BE USED
IN THE MANUFACTURE OF METALLIC TUBES," to be as follows:-
My said Invention consists of new or improved machinery or
apparatus constructed as herein-after described to be used in the
o manufacture of metallic tubes, which said machinery or apparatus is
especially applicable to the manufacture of tubes of brass and copper, but
may also be applied to the manufacture of tubes of other metals or
alloys which are or may be made by casting a tubular or hollow ingot
upon a core, and afterwards reducing the same by the drawing process.
5 My new or improved machinery or apparatus has for its object
principally to withdraw the core from the tubular or hollow ingot, but
the said machinery or apparatus may also be employed for drawing
tubes of short length.

page_text: My new or improved machinery
apparatus 1s
constructed as
follows:-Upon a bed or support fixed at a convenient height two
horizontal and parallel bars are supported at their ends; upon these
bars a cross head slides, the said bars passing through holes in the said
is attached, the said plyers being supported on a carriage in front of the
said cross head; the said plyers resemble those used in drawing tubes
excepting that they are connected to the cross head by rigid connecting
rods instead of by chains.
5
To the rear end of the cross head one end of a long connecting rod is 1
jointed, the other end being jointed to a crank pin on the face of a large
wheel driven slowly by steam or other power. By the rotation of the
said wheel a slow reciprocating motion is communicated to the cross
head described. The connecting rod is connected to the cross head by
means of a slot in the end of the said rod, through which a pin or axis 1
on the cross head passes.
The result of this arrangement is that the said cross head rests for a
short time at each end of its stroke. The machinery or apparatus
described somewhat resembles that of an ordinary draw bench and has
for its object to draw with great force a rod or mandril constructed in
the following manner :-The said rod or mandril is of a cylindrical figure,
excepting at its rear end, and is of less diameter than the hollow core
bar to be withdrawn from the tubular or hollow ingot; the rear end of
the said mandril is of larger diameter than the hollow core bar, and
carries two cutting knives or blades crossing it at right angles so as to
constitute four cutting tools; the length of the said knives is such that
they will enter the hollow or tubular ingot from which the core bar and
core are to be removed. My Invention is used as follows:-The
workman takes the hollow or tubular ingot with its core and hollow core
bar, and introduces into the said hollow core bar the mandril herein-
before described; the fore end of the said mandril is passed through a
hole in a strong collar which is placed against the end of the drawing
apparatus described; the hole in the said collar is sufficiently large to
permit of the passage through it of the hollow core bar.
The fore end of the mandril is inserted in the plyers during the
position of temporary rest of the cross head; on the said cross head
commencing to move the plyers close upon and grip the mandril, which