An Improvement in the Means of Relieving Extra Pressure from Steam, Gas, Liquid, and the like, contained in Boilers, Tanks, Cisterns, Pipes, and the like Receptacles.
Year: 1898

page_text: An Improvement in the Means of Relieving Extra Pressure from
Steam, Gas, Liquid, and the like, contained in Boilers, Tanks,
Cisterns, Pipes, and the like Receptacles.
ALEXANDER MACPHERSON NICHOLSON and PETER ADE, of 31, 33 and 35, South
Street, Eastbourne, Sussex, Ironmongers, Plumbers, Hot Water, Gas and Sanitary
Engineers, &c., do hereby declare the nature of this invention to be as
follows:-
A safety valve made to be fixed on or fitted to the inside of any receptacle
requiring it and to act from within the said receptacle.
The outer part of the valve is formed by a hollow cylindrical screwed bolt. This
bolt passes through the hand hole or inspection cover or door or the like or any
other suitable part of the receptacle and into and through the bridge or door or
other part in the said receptacle to which such bolt may be fixed. To the top of
this bolt a nut or other device is screwed to make the joint tight round the hole
cover lid or door or the like in the receptacle. This nut or other device is holed to
allow of the passage of the contents escaping through the safety valve from the
receptacle.
The valve is formed inside of the cylindrical bolt described above with properly
constructed seatings. A hollow bush piece one end of which serves to form one of
the seatings is made or screwed into the inner end of the said cylindrical bolt. The
movable parts of the valve are kept in proper position by an adjustable spring or
other device bearing on the inner valve seating. This spring or other device can be
regulated to resist any pressure required by a screwed adjustable holdbush or other
device fitted at the opposite end of the spring inside or outside of the said
cylindrical bolt when the pressure in the receptacle forces open the valve this
adjustable bush or other device being holed allows the contents escaping through
the valve to pass.out by the aforesaid cylindrical bolt.
The parts of the valve are made of or in iron, steel, gun metal, brass, white
metal, vulcanite, india rubber or of or in any other suitable substance or
material.

page_text: An Improvement in the Means of Relieving Extra Pressure from
Steam, Gas, Liquid, and the like, contained in Boilers, Tanks,
Cisterns, Pipes, and the like Receptacles.
ALEXANDER MACPHERSON NICHOLSON and PETER ADE of 31, 33 and 35, South
Street, Eastbourne, Sussex, Ironmongers, Plumbers, Hot Water, Gas and Sanitary
Engineers, &c., 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:—
A safety valve made to be fixed on or fitted to any receptacle requiring it and to
act from within the said receptacle.
The outer part of the valve is formed by a hollow cylindrical screwed bolt.
This bolt passes through the hand hole or inspection cover, or door, or the like,
or any other suitable part of the receptacle and into and through the bridge to
which such bolt may be fixed when without bridge or cover it can be attached to
receptacle by a nut or nuts.
To the top of this bolt a nut or other device is screwed to make the joint tight
round the hole cover, lid, or door, or the like in the receptacle. This nut or other
device is hollow to allow of the passage of the contents escaping through the safety
valve from the receptacle.
The valve is formed inside of the cylindrical bolt described above with properly
constructed seatings.
A hollow bush piece one end of which serves to form one of the seatings is made
in one with or screwed into the inner ond of the said cylindrical bolt. The movable
parts of the valve are kept in proper position by an adjustable spring or weight
bearing on the holder of the valve.
The spring or weight can be regulated to resist auy pressure required by a
crewed adjustable hollow bush or other device fitted at the opposite end of the
spring inside or outside of the said cylindrical bolt. When the pressure in the
receptacle forces open the valve this adjustable bush or other device being hollow
allows the contents escaping through the valve to pass out by the aforesaid
cylindrical bolt.
The parts of the valve are made of or in iron, steel, gun metal, brass, white metal,
vulcanite, indiarubber, lead, or of or in any other suitable substance or material.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section and Figure 2 is a plan of one form of a safety valve
constructed according to this invention.
1
a is a cover which passes over the cylindrical bolt fixed to bridge b b.
bb is the bridge to which hollow cylindrical bolt fixed, and is shown inside of
receptacle A. A.
c is a hollow cylindrical bolt in which the valve is fitted.
d is a hollow bush with raised or flat seating fitted to the cylindrical bolt to
receive seating e.
e is a seating of suitable material.
f is a winged holder for containing seating e, to which spring g is attached.
g is a spring which compresses seating e on to seating d & is kept in position by
bush h.
his a screwed bush which fits in one end of cylindrical bolt and regulates the
tention of spring g.

page_text: ¹ is a passage through seating d to allow exit of contents of receptacle when
under sufficient pressure to compress spring & move seating e out of its normal
position.
22 is a passage for free escape of the contents of the receptacle under conditions
described in .
kis a nut which fits over screw on outside of hollow cylindrical bolt c for
attaching cover a a to receptacle A A (with packing material Ñ between).
I is packing material to make joint tight.
m is a washer to keep packing in position.
n is packing material.
o is projecting piece of cover a which fits in corresponding hole or slot in
receptacle A A to prevent cover turning.
is a loose cover to prevent obstruction in passage i².
The drawings shew this invention fitted to a circular cover but it can be fitted
and fixed to any shape cover, door, bridge, receptacle and the like.
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 combination of a bolt and relief valve by which inordinate pressure is
relieved from receptacles.
2. Placing the relief valve in bridge, door, cover or the like or any other suitable.
part of the receptacle."
3. Relief valve with spring or other device substantially as described and shown
in the drawings.
Dated this 31st day of October 1898.
ALEXR. M. NICHOLSON.
PETER ADE.