Improvements in the Manufacture of Manholes and Stand-pipes for Steam Boilers, and in Apparatus therefor.
Year: 1893

page_text: Date of Application, 24th Nov., 1893-Accepted, 30th Dec., 1893
COME LEIE DI MUITIATION.
Improvements in the Manufacture of Manholes and Stand-pipes for
Steam Boilers, and in Apparatus therefor.
We WILLIAM MALAM of 911 Ashton Old Road, Fairfield, and WILLIAM
SCHOFIELD of 719 Ashton Old Road, Openshaw both near Manchester in the
County of Lancaster, Boiler Makers, 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 relates to the manufacture of manholes and stand pipes for steam
boilers by the method described in the Specification of Letters Patent No. 21750
granted to ourselves and dated the 12th day of December A.D. 1891.
Instead of making use of solid cylindrical blooms or drawn tubes as described in
the above named Specification we now propose to form our manholes and stand
pipes from a tube made of a thick plate or bar of metal a formed for example as
shewn at Fig. 1 on the annexed drawings and bent into a tubular shape (see Fig. 2)
and then welded so that when the manhole or stand pipe is completed as described
in the aforesaid Specification it is practically weldless.
Or the tube may be welded during the said operation of upsetting the flanges
thereon.
Or the tube may be formed from a plate or bar of a section such as shewn at
Fig. 14, and then welded before or during the flanging as above described; or the
said tube may be formed as shewn at Figs. 1 and 2, in which case the welding
must take place before upsetting the flanges.
Or we may employ a bar of metal coiled into a spiral form as seen at 6 Fig. 3
and thus forming a tube which can be welded together either before or during the
operation of upsetting the flanges thereon.
We also secure together the dies for holding the tube bloom from which the
manhole or stand pipe is to be made by fixing each of them at the end of a ram
or piston rod which works in a steam cylinder or its equivalent and thus the dies
can be readily separated and replaced as required. Fig. 4 illustrates this con-
struction in plan; ce being the dies fixed at the end of the piston rods d d', the
pistons of which work in the cylinders e e¹.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
1. The manufacture of manholes and standpipes by first forming a tube of a
thick plate of metal bent round and then welding the same either before or
during the process of upsetting the flanges thereon, substantially as hereinbefore set
forth.
2. The manufacture of manholes and stand pipes by first forming a tube of a bar
of metal bent round or coiled in a spiral form, and then welding the coils together
either before or during the process of "upsetting" the flanges on the said tube
substantially as hereinbefore set forth.
3. Mounting the dies for holding the bloom in position upon rams or piston rods
actuated by steam or other power substantially as hereinbefore set forth.
Dated this 23rd day of November 1893.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.