Improvements in the Manufacture of Tubes.
Year: 1899

page_text: Improvements in the Manufacture of Tubes.
I, HARRY PERRINS, of The Hawthorns, Wollaston, Stourbridge, in the County
of Worcester, Engineer. do hereby declare the nature of this invention to be as
follows:-
This invention consists of improvements in the manufacture of tubes for
boilers and for other purposes in which either the inner or outer surface of the
tubes is in contact with water.
It is a well known fact that whereas steel tubes are much stronger than wrought
iron tubes, the latter are not so readily attacked by corrosion as the former.
The object of my invention is to readily produce boiler and other tubes having
the advantage or much of the advantage possessed by steel tubes as regards
strength and also the advantage of wrought iron tubes as regards resistance to
corrosion.
I manufacture boiler and like tubes in accordance with my invention preferably
from a piled hollow or tubular bloom in the manner described in the Specifica-
tion No. 22947 of 1897 on which Letters Patent have been granted to me. But
instead of building up the bloom entirely from puddled or other irons bars, I
make one set of bars from iron and the other set from steel, arranging the
iron bars either within or without the steel bars according as to whether the
tubes are to be used for a water tube or tubulous boiler. in which the water
passes through the tubes, or for a fire tube or tubular boiler in which the fire
or products of combustion pass through the tubes whilst the water surrounds.
the same.
Thus in the manufacture of tubes for a water tube or tubulous boiler I make
the inner segments or trough-shaped bars from puddled or wrought iron,
and the outer segments or bars of the complete pile or bloom from mild steel;
the complete tube will then have a wrought iron surface exposed to the water
but will be strengthened by the steel with which its outer portion is formed.
But for a fire tube or tubular boiler I make the inner segments or trough shaped
'bars from mild steel, and the outer segments or bars of the complete pile or
bloom from puddled or wrought iron, in order that the latter metal shall in
this case also be in contact with the water whilst the steel is protected from
same.
The piled hollow bloom so formed is treated in the manner described in the
aforesaid prior specification, and at the conclusion of the processes the two
metals will be effectually welded to form the one complete compound tube.
Dated this 17th der of trust 1800
MARKS & CLERK.
18. Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street Manchester,
Agents for Applicant.

page_text: Improvements in the Manufacture of Tubes.
I, HARRY PERRINS, of The Hawthorns, Wollaston, Stourbridge, in the County
of Worcester, Engineer, 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:-
This invention consists of improvements in the manufacture of tubes for
boilers and for other purposes in which either the inner or outer surface of the
tubes is in contact with water.
It is a well known fact that whereas steel tubes are much stronger than wrought
iron tubes, the latter are not so readily attacked by corrosion as the former.
The object of my invention is to readily produce boiler and other tubes having
the advantage or much of the advantage possessed by steel tubes as regards
strength and also the advantage of wrought iron tubes as regards resistance to
corrosion.
But
I manufacture boiler and like tubes in accordance with my invention from
a hollow or tubular bloom preferably such as described in the Specification
No. 22947 of 1897 on which Letters Patent have been granted to me.
instead of building up the bloom entirely from puddled or other iron bars or
segments, I make one set of bars from iron and the other set from steel, arranging
the iron bars either within or without the steel bars according as to whether
the tubes are to be used for a water tube or tubulous boiler in which the water
passes through the tubes, or for a fire tube or tubular boiler in which the fire
or products of combustion pass through the tubes whilst the water surrounds
the same.
Thus in the manufacture of tubes for a water tube or tubulous boiler I make
the inner segnients or trough-shaped bars from puddled or wrought iron,
and the outer segments or bars of the complete pile or bloom from mild steel;
the complete tube will then have a wrought iron surface exposed to the water
but will be strengthened by the steel with which its outer portion is formed.
But for a fire tube or tubular boiler I make the inner segments or trough shaped
bars from mild steel, and the outer segments or bars of the complete pile or
bloom from puddled or wrought iron, in order that the latter metal shall in
this case also be in contact with the water whilst the steel is protected from
same.
The piled hollow bloom built up of trough shaped steel and iron segments
in the manner described is heated in a furnace and subsequently extended by
rolling and formed into a compound tube of the required dimensions.
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
Tubes for boilers and for other purposes produced from a combination of
iron and steel segments, substantially as described.
Dated this 50th day of Apr 1900.
Dated this on day of 0.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street Manchester.
Agents for the Applicant.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street Manchester.
Agents for the Applicant.