Improvements in Non-return Gas Valves.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Non-return Gas Valves.
I, ARCHIBALD KAY, of The Manchester Acetylene Gas and Carbide Company,
St. Simon Street, Salford, Manchester, in the County of Lancaster, Gas Engineer,
do hereby declare the nature of my invention to be as follows:-
This invention has reference to and comprises improvements in the construction
of non-return valves specially designed for use with acetylene gas generating
apparatus but which is equally suitable for use with any description of gas. The
body or casing of valve is preferably cylindrical and constructed of cast iron,
but it may also be made in brass or aluminium or alloys of same.
The valve
seat is turned and faced in the casing of valve or it may be made of a white
metal seat inserted therein. The valve is formed of a hemispherical shape
preferably made of pure block tin aluminium or other suitable white metal,
having the lower edge turned to a bearing and ground to form a gas tight contact
with valve seating. The valve is pivotted on or secured to a vertical spindle
working true in guides within the casing above and below the valve seat and
provided with a stop to prevent it being lifted out of position. The ends of
valve outlet and inlet are screwed to receive iron or other tubes and may be
fitted with coupling tails.
The object of the whole arrangement is to secure a large surface for the ascend-
ing gas to act upon, and to secure the opening of valve with a slight pressure
say not exceeding 2/10ths of gas pressure and to secure the perfect closing of valve
against back flow of gas.
The special arrangement is also designed to prevent the valve becoming fixed
in its seat and so causing over pressure in apparatus. The hemisphere being
constructed of light material is designed to give way with a slight increase of
pressure in the event of valve becoming fixed by any accident and so admit of
gas passing from generator to holder or receiver.
A
1 1
021
Antahan 1907
Improvements in Non-return Gas valves.
I, ARCHIBALD KAY, of The Manchester Acetylene Gas and Carbide Company,
St. Simon Street, Salford, Manchester, in the County of Lancaster, Gas Engineer,
do hereby declare the nature of my invention and in what manner the same is
Th

page_text: to be performed, to be particularly described and ascertained in and by the
following statement in writing reference being made to the accompanying
drawing:-
This invention has reference to and comprises improvements in the construction
of non-return valves specially designed for use with acetylene gas generating
apparatus but which are equally suitable for use with any description of gas.
And in order that my said invention may be properly understood I have
hereunto appended a drawing being a sectional elevation of the arrangement.
Referring to this drawing:-
The body or casing A of valve is preferably cylindrical and constructed of
cast iron, but it may also be made in brass or aluminium or alloys of same. The
valve seat B is turned and faced in the casing A of valve or it may be made of
a white metal seat inserted therein. The valve C is formed of a hemispherical
or dome shape preferably made of pure block tin, aluminium or other suitable
white metal, having the lower edge turned to a bearing and ground to form a
gas-tight contact with valve seating B. The valve C is pivotted on or secured by
screwing or otherwise to a vertical spindle I working true in guides D¹ D² within
the casing above and below the valve seat B and which is provided with a stop E
to prevent it being lifted out of position. The ends of valve outlet and inlet are
screwed to receive iron or other tubes and may be fitted with coupling tails.
The object of this arrangement is to secure a large surface for the ascending gas
to act upon, and to secure the opening of valve with a slight pressure say not
exceeding 2/10ths of gas pressure and to secure the perfect closing of valve
against back flow of gas.
The special arrangement is also designed to prevent the valve becoming fixed in
its seat and so causing over pressure in apparatus. The hemisphere being con-
structed of light material is designed to give way with a slight increase of pressure
in the event of valve becoming fixed by any accident and so admit of gas passing
from generator to holder or receiver.
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:
First. Non return gas valves constructed and arranged all substantially as
herein described and illustrated by the accompanying drawing.
Second. In a non return gas valve the dome shaped valve C mounted on the
spindle D working in guides D1 D2 all substantially as herein described and
illustrated by the accompanying drawing.
Ucted the D2nd Manch 1000