IMPROVEMENTS IN THE CONSTRUCTION OF STAND PIPES FOR GAS RETORTS
Year: 1885

page_text: I, ROBERT DEMPSTER Junior of the firm of R. and J. Dempster,. of Newton
Heath, Manchester, Gas Engineers, do hereby declare the nature of my invention
for "IMPROVEMENTS IN THE CONSTRUCTION OF STAND PIPES FOR GAS RETORTS"
to be as follows:-
The improvements relate to the construction of stand pipes for retorts used in
the manufacture of gas, and have for object the lightening of such stand pipes and
forming the same of thinner metal than at present obtaines.
The stand pipes for gas retorts are for the most part at present constructed by
casting the same from cast iron by which means they are caused to be of great
weight to give the requisite strength.
To remedy this and to effect my improvements, I, construct the same from drawn
or welded tubing composed of wrought iron or steel. To enable the same to be
suitably flanged, I cast separate flanges of cast metal and after boring the same
to the required size, they are shrunk on to the pipes or tubes which may or may
not be previously turned at the end for the purpose. In addition to which the
flanges may be further secured by pins, rivets, screws, bolts, keys or wedges, and
the joints may be calked if need be.
In lieu of such separately formed flanges the flanges may be forged, and
variations in detail may be made without departing from the peculiar character
of the invention, which consists in the construction of the stand pipes for gas
retorts of wrought iron or steel, whether with separately formed flanges attached
thereto, or with flanges forged thereon.

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Gas Retorts.
I, ROBERT DEMPSTER Junior, of the firm of R and J Dempster, of Newton Heath,
Manchester; Gas Engineers, do hereby declare the nature of my invention for
IMPROVEMENTS IN THE CONSTRUCTION OF STAND PIPES FOR GAS RETORTS," and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The improvements relate to the construction of stand pipes for retorts used in
the manufacture of gas, and have for object' the lightening of such stand pipes and
forming the same of thinner metal than at present obtaines.
The stand pipes for gas retorts are for the most part at present constructed by
casting the same from cast iron, by which means they are caused to be of great
weight to give the requisite strength.
To remedy this and to effect my improvements, I construct the same from drawn
or welded tubing composed of wrought iron. or steel. To enable the same to be
suitably flanged, I cast separate flanges of cast metal and after boring the same
to the required size, they are shrunk on to the pipes or tubes which may or may
not be previously turned at the end for the purpose: In addition to which, the
flanges may be further secured by pins, rivets, screws, bolts, keys, or wedges, and
the joints may be calked if need be...
In lieu of such separately formed flanges the flanges may be forged, and variations
in detail may be made without departing from the peculiar character. of the
invention, which consists in the construction of the stand pipes for gas retorts of
wrought iron or steel, whether with separately formed flanges attached thereto, or
with flanges forged thereon!
But that the improvements may be better understood, I will, with the aid of the
accompanying drawings, proceed to further describe means employed by me.
DESCRIPTION OF DRAWINGS.
Fig. 1. is an elevation, Fig. 2. a section, and Fig. 3. a plan, of one form of the
apparatus arranged in accordance with my invention..
The same letters indicate corresponding parts wherever' they occur.
a, a, is the tube of wrought iron or steel, and b, b, is the flange which in this case
is of cast iron and shrunk on to the tube, and secured by means of pins' passing
through the two.
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
L
+
"
The construction of stand pipes for gas retorts of' wrought iron or steel tubes
having cast iron flanges shrunk thereon or forged thereto in manner and for the
particular purpose as shewn and described.
Dated this 26th day of March 1886.
.