An Improved Safety Apparatus for Kitchen Boilers.
Year: 1895

page_text: Date of Application; 20th Feb.. 1895
Complete Specification Left, 18th Nov., 1895-Accepted. 21st Dec., 1895
PROVISIONAL SPECIFICATION.
An Improved Safety Apparatus for Kitchen Boilers.
I, WILLIAM BATTENSBY of Park Close, Blaydon-on-Tyne in the County of
Durham, Pattern Maker do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to provide a device to be placed in communication
with or made a part of a kitchen boiler. in order to provide a relief passage
therefrom in event of the usual vent pipe becoming stopped.
In a suitable chamber, communicating with the. boiler by a pipe or pipes and
preferably placed on a level with the boiler, is an orifice surrounded by a valve
seating and closed from the exterior by a valve held to its seat by a spring. From
the upper part of the chamber the vent pipe may be carried into the flue or into
the outer air or otherwise. The aforesaid valve is contained within a valve
chamber from which an open vent pipe also is carried to any suitable place.
The aforesaid valve is in the form of a ring and its stem is hollow so that the
whole forms a tube within which is a rod carrying a valve which seats upwards,
that is to say from the interior of the chamber, against the seating around the
orifice in the former valve. This rod extends. down into the chamber and carries a
float, and it also extends upwards out of the valve chamber where it is provided
with a handle and an indicator of its position..
Should the vent pipe become stopped and the pressure rise in the boiler, the
first valve will be raised and relief afforded. Should the water descend to too low
a level so that the float falls, the second valve will fall and relief passage will again
be opened:
By raising or pressing down the handle by hand. from time to time it may
be ascertained that the parts are in working order without dismounting the
apparatus.
In place of. using a chamber in communication with the boiler, the latter may,
when this can be done conveniently, take the place of said chamber and the valve,
chamber with the valves may be fitted directly, upon the boiler.
Dated this 20th day of February 1895.
HERBERT HADDAN & Co.,
Agents to Applicant.
An Improved Safety Apparatus for Kitchen Boilers:
I, WILLIAM BATTENSBY of Park Close, Blaydon-on-Tyne, in the County of
Durham, Pattern Maker, 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 :-
The object of this invention is to provide a device to be placed in communication
with or made a part of a kitchen boiler in. order to provide a relief passage
therefrom in the event of the usual vent pipe. becoming stopped.

page_text: In a suitable chamber communicating with the boiler by a pipe or pipes and
preferably placed on a level with the boiler, is an orifice surrounded by a valve
seating and closed from the exterior by a valve held to its seat by a spring or
weight. From the upper part of the chamber the vent pipe may be carried into
the flue or into the outer air or otherwise. The aforesaid valve is contained
within a valve chamber from which an open vent pipe also is carried to any
suitable place.
The aforesaid valve is in the form of a ring and its stem or centre is hollow so
that the whole forms a tube within which is a rod carrying a valve which seats
upwards, that is to say from the interior of the chamber, against the seating around
the orifice in the former valve. This rod extends down into the chamber and
carries a float and it also extends upwards out of the valve chamber where it is
provided with a handle and an indicator of its position.
Should the vent pipe become stopped and the pressure rise in the boiler, the
first valve will be raised and relief afforded. Should the water descend to too low
a level so that the float falls, the second valve will fall and relief passage will
again be opened.
By raising or pressing down the handle by hand from time to time it may
be ascertained that the parts are in working order without dismounting the
apparatus.
In place of having a chamber in communication with the boiler the latter may
when this can be done conveniently take the place of said chamber and the valve
chamber with the valves may be fitted directly upon the boiler.
In the annexed drawings is shown an apparatus consisting of a vessel in com-
munication with the boiler and also with the atmosphere. The float in this vessel
is connected to a valve opening inwardly, and when the vessel is full of water
tends to keep this valve closed. This valve works within another valve which
opens outwardly when the pressure in the vessel rises above a certain amount.
This amount is regulated by means of weights or springs. The spindle of the float
valve is long and serves as a handle. It has a pointer on the upper end which
shows on an indicator fixed to the apparatus the level of the water in the boiler, or
if the connection is made to the hot water pipe from the boiler, the indicator will
show when the level of the water in the pipe sinks below the level of the apparatus.
An electric bell or other alarm may be connected to the pointer or indicator so as
to draw attention.
Fig. 1. is a sectional elevation showing the application of a weight to the valve
by means of a lever, but if preferred the weights may be placed directly on the
valve.
Fig. 2. is a horizontal section on line 2-2 Fig. 1.
Fig. 3. is an elevation of the outer valve.
Fig. 4 shows the alternative arrangement when a spring is employed. In every
case the weights or springs are regulated to give the requisite pressure on the
valve.
A is a vessel in communication with the kitchen boiler by means of either one
pipe P, or two pipes P & O as may be preferred, either directly or to the hot
water pipe from the boiler. N is an exhaust qr vent pipe either to the atmosphere
above the level of the supply tank or it may be connected to the usual vent pipe
on the boiler. B is a hollow or other float connected to the spindle J which
carries the valve D which falls inwardly. The seat of valve D is part of or fixed
to the hollow valve C which is provided with passages L to allow escape past the
valve D to the vent M. The valve C may work through a fairly fitting hole in
the casing A or a gland may be provided, but this is not often necessary. The
rod J is preferably made hollow so as to be as light as possible and thus enable
the size of float B to be reduced.
K is a pointer fixed to rod J and F is a vertical scale in relation to the
pointer K. G is the weight on lever E necessary to give the required pressure.
The lever E is forked at its fulcrum end and may be pivoted to the standard F.

page_text: It embraces rod J and rests on two knife edges H on the valve body C. M is a
short vent or escape pipe.
In Fig. 4 S is a spring for keeping down the valve C. Q is a casing for holding
the valve and spring. R is a base plate which closes vessel A.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :--
In a safety apparatus for kitchen boilers.
1. The combination of two valves one within the other acting as reliefs, the one
in case of excess of pressure, the other on decrease of water in boiler or pipes
leading from it.
2. The combination with the valves aforesaid of the indicator for showing the
level of the water.
3. The construction of said valves with the means for operating them and the
relief vents in relation to said valves substantially as described.
4. The combination with the vessel A of the said valves, means for operating
them, the relief vents, indicator, and connections for combination with the boiler
substantially as illustrated and described.
Dated this 18th day of November 1895.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., Agents to Applicant.