Improved Combined Boiler Safety and Anti-concussion Valve.
Year: 1895

page_text: Date of Application. 14th Mar.. 1895
Complete Specification Left, 29th Oct., 1895-Accepted, 7th Dec., 1895
PROVISIONAL SPECIFICATION.
Improved Combined Boiler Safety and Anti-concussion Valve.
JAMES FRANKLIN WALLER 46 Fish Street Hill London Engineer do hereby
declare the nature of this invention to be as follows:--
The body of the valve A is made of cast iron or any other metal, the socket
shank is screwed iron barel gauge, it is also bored tapped & fitted with a small gun
metal cock for testing, the top is bored and screwed to receive gun metal collar (B),
and tube upon which is formed the seating of valve, the valve is arranged by a
gun metal spindle & cap (C), which is fitted with an asbestos compo washer (D),
affixed to this valve is a feathered spindle or guide which also serves to keep an
aluminium ball (E) (fitted for automatic closing arrangement, in position) the tube
in which this spindle or guide is placed, is also provided with a gun-metal
perforated cap or basket (F) to receive & guard the aluminium ball, the tube upon
which this cup is screwed also forms part of the air vessel G, the object of which
is to prevent any concussion or vibration in pipes caused by the opening & shutting
off of valves of the various service pipes especially under high pressure.
The automatic closing arrangement mentioned previously is effected by the
aluminium ball being released by the removal of the weight or levers, and is raised
by the pressure of water into the coned seating at the end of tube. The valve is
covered by an outer shell H shaped to receive additional weights equal to the
column of water to be resisted.
A gun-metal or steel point I is fitted in the head of shell, which drops into an
opening in the head of valve for more effectual means of closing level on the
seating.
Dated this Fourteenth day of March 1895.
Improved Combined Boiler Safety and Anti-concussion Valve.
I, JAMES FRANKLIN WALLER of 46 Fish Street Hill, London, 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, that is to say :-
For the purpose of having a safety valve, with an air chamber attached with
automatic ball valve; that is easily repaired & examined without cutting off the
supply as is necessary with other valves & over which my improvement claims
considerable advantages.
The safety valve may be of wrot, cast or malleable iron, steel or brass or any
other metals & consists of :-

page_text: The aluminium ball marked E.
The perforated basket or cap marked F.
The dead weight cover with flange marked H.
The gunmetal or steel point marked I.
On drawings left with Provisional Specification.
The improved safety valve comprises a cylindrical cup-like vessel A which is
connected with the boiler or water pipes in any convenient manner so that the
water has free access to the lower part of the vessel. There is a circular
opening in the top & through this a tube B descends within the cylinder
nearly to the bottom, on the upper part of this tube is formed the seating for the
spindle C. & at the lower end a perforated cradle or cap F is fixed to receive &
keep in position an aluminium ball E. which forms automatic closing arrangement
on the withdrawl of the spindle C for examination or repairs, by being forced by
the hydrostatic pressure or steam against the seating formed at the lower end of
the tube B. The spindle C extends to just within the cap F. (when the valve
is in position) & keeps the aluminium ball E. from closing against the tube. The
cap screwed upon the spindle C. has an asbestos compo washer inserted to form
valve. The space G. between the tube B. and the body A. forms the air chamber
which prevents vibration caused by the opening and shutting off of cocks attached
to any portion of the pipes in connection with the boiler. The cover H which
forms dead weight has a flange to receive weights sufficient to keep the valve
closed against the hydrostatic pressure, the frame of this is of cylindrical form &
is loaded with weights which are annular. Within this cover is fixed a gunmetal
or steel point I. which rests in an opening in the head of the collar B. for
keeping the valve closed and level on the seating.
Having now particularly described and ascertained the nature of my said inven-
tion, & in what manner the same is to be performed, I declare that what I
claim is:-
That I do not make any claim to the sole use of a dead weight safety valve
for boilers or boilers of hot-water apparatus, but I claim the construction of such
safety valves with an air vessel & automatic closing arrangement, substantially as
herein before described, to prevent escape of water at the valve at the times when
any of the draw off cocks in connection with the boiler or service pipes are opened
or closed & to an automatic closing arrangement to prevent the escape of water or
steam when the valve is being examined, tested or repaired.
Dated this 28th day of October 1895.
JAS. F. WALLER.