Improvements in Water-tube and other Boilers.
Year: 1897

page_text: Date of Application, 8th Dec., 1897
Complete Specification Left, 6th Sept., 1898-Accepted, 19th Nov., 1898
PROVISIONAL SPECIFICATION.
Improvements in Water-tube and other Boilers.
ALBERT EDWARD HILLS, Plume Street, Aston, Birmingham, do hereby declare the
nature of this invention to be as follows:-
My invention relates mainly to improvements in water-tube boilers, but it
applies also to all other tubular boilers whether the water or the fire passes through
the tubes, and also to egg-ended, Cornish and other similar boilers. Whereas
hitherto tubes of brass copper iron, steel or other metal have been used with
detriment to quality owing to pitting, rotting or general disintegration, rusting
&c. especially in cases of extreme heat, I now take two tubes or if desirable three
or more tubes of different metals suitable to best resist the action of the water on
the one side and the fire on the other; these tubes are drawn or otherwise suitably
fixed the one in or over the other thus making one tube of combined metals, so
that galvanizing or other deposited coat of soft metal now frequently used for
the protection of the original tube can be done away with. My invention also
covers the use of an inside or outside, or of an inside and outside shell of a second
metal in Cornish & similar boilers.
Dated thi th
רד . נ
100%
I, ALBERT EDWARD HILLS, Plume Street, Aston, Birmingham, Manufacturer,
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 follow-
ing statement:-
:-
My invention has for its object the production in a convenient and economical
manner of compound tubes, suitable for water tube or other boilers, from different
metals which are so disposed as to resist the action of the water on the one side
and of the fire on the other side.
In the manufacture of compound steel and brass or steel and copper tubes in
accordance with my invention I produce a weldless or solid drawn steel tube and a
similar brass or copper tube in the ordinary manner, making the brass or copper
tube of such an external diameter as to permit of its being slid into the steel tube.
After inserting the brass or copper tube within the steel tube, I draw the two together
on a mandrel, or over a fixed mandrel, through a reducing die in an ordinary draw
Price 821

page_text: bench, and by such process the two different metals from which the tubes are
formed are caused to flow together under the action of the pressure of the die
tending to force the metals inwards or towards the mandrel.
By such a simultaneous flow of the metals as they pass through the reducing
die, I cause them to become effectually united and thus from the two tubes arranged
within and without each other I obtain the one compound tube with a uniform
density or homogeneous structure of material throughout.
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
The manufacture of compound tubes for boilers from tubes of different metals
by the drawing of such tubes together through a reducing die in conjunction with
a mandrel, substantially as and for the purpose described.
1
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.