IMPROVE- MENTS IN THE MANUFACTURE OF ORNAMENTAL METALLIC TUBES
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by James Atkins at the Office of the
Commissioners of Patents on the 25th June 1878.
JAMES ATKINS, of the Firin of Robert Walter Winfield and Company, of Bir-
mingham, in the County of Warwick, Merchants and Manufacturers." "IMPROVE-
MENTS IN THE MANUFACTURE OF ORNAMENTAL METALLIC TUBES."
My Invention has reference principally to such ornamental metallic tubes as
consist of a perforated external tube of one metal having within it another tube
of a different metal, the metal of the inner tube showing through the perforations
in the outer tube.
My said Invention inay however be applied to the manufacture of ornamental
metallic tubes, in which the inner and outer tubes are of the same metal, as herein-
after explained.
In the ordinary method of manufacturing ornamental metallic tubes of the kind
referred to the outer perforated tube is attached to the inner tube by soldering or
brazing.
In manufacturing the said tubes, according to my Invention, I place the outer
perforated tube on the inner tube, and subject the compound tube to the drawing
process. By this treatment the outer perforated tube is firmly attached to the inner
tube, and the metal of the inner tube forced to a considerable extent into tho
perforations in the outer tube, producing an ornamental effect not otherwise
attainable.
The method of connecting the outer perforated tube to the inner tube, which
method constitutes the principal part of my Invention, has this further advantage
that the two tubes can be finished by polishing, burnishing, chasing, dipping, or
otherwise before being put together and subjected to the drawing process, the
only treatment the compound ornamental tube requires after the drawing process
being lacquering where the metals of which the tube is made are suitable for the
lacquering process.
The compound tube may be strengthened where great strength is required by
the insertion in its interior of a strong iron tube. This supporting or strengthening

page_text: tube is introduced into the compound tube before the latter is subjected to the
drawing process by which the perforated tube is attached to the inner tube, the said
drawing process also effecting the fixing of the strengthening tube withing the
compound ornamental tube; or the inner tube may be first drawn on the strength-
ening tube, and thereby fixed therçon. The outer tube is then passed on to the
coated strengthening tube, and fixed thereon by another drawing process.
The outer tube, besides being perforated, may be ornamented with an impressed
or otherwise produced pattern or design, and the inner tube may also ornamented
with perforated, impressed, or otherwise produced designs.
Although my Invention is mainly applicable to the manufacture of ornamental 1
tubes, in which the outer perforated tube is of a different metal from the inner tube,
yet my Invention is also applicable to the inanufacture or ornamental tubes having
both the outer perforated tube and the inner tube of the same metal.
Designs may in this way be produced which cannot be produced by the ordinary
methods of manufacturing ornamental metallic tubes.
In describing my Invention I have spoken only of metals, but my Invention is
applicable to the manufacture of ornamental metallic tubes of all such metals and
metallic alloys as are or may be made into tubes.
1