Improvements in and Connected with Boilers Heated by Gas.
Year: 1886

page_text: Date of Application, 30th Apr., 1886.
Complete Left, 29th Jan., 1887.
Complete Accepted, 1st Apr., 1887.
Improvements in and Connected with Boilers Heated by Gas.
I, LEWIS WALKER LEEDS of 38 Old Jewry in the City of London, Heating and
Ventilating Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to that class of boilers in which the water is heated by means
of gas as distinguished from those in which coal, coke, or other solid fuel is employed.
The invention consists in the arrangement and combination of parts, the nature of
which are hereinafter set forth.
The fire chamber is closed as regards the external air except such as is admitted
through the air supply pipe, which may conveniently carry within it the gas pipe to
the burners, the amount of gas and air admitted being automatically regulated by
valves or taps governed by a connecting rod and lever, the movement of the latter
being governed by the pressure in the boiler.
The burners may be of the Bunsen, Argand, flat, or other type and are arranged
to burn beneath an arch or layer of asbestos or other refractory material perforated or
laid, so that the flame and heat will raise it to a high temperature and from thence
pass around or through the tubes, depending upon which class of construction of
boiler is adopted.
Above the boiler and connected thereto, at preferably, at least four separate points
is a steam chest or drum from which comparatively dry steam may be drawn, while
the ordinary automatic or other method of feeding the boiler is employed.
T: Qual
J110ve
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London,
Applicant's Agent.

page_text: I, LEWIS WALKER LEEDS of 38 Old Jewry in the City of London, Heating and
Ventilating 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 :-
This invention relates to that class of steam boilers in which the water is heated by
means of gas as distinguished from those in which coal coke or other solid fuel is
employed.
The invention consists in the arrangement and combination of parts the nature of
which are hereinafter set forth, reference being made to the accompanying drawings
which form part of this specification and in which
Fig. 1. represents in sectional elevation a vertical boiler constructed according to
my invention,
Fig. 2 represents a plan of the boiler on the line
Fig. 3 represents in sectional elevation a horizontial boiler and
Fig. represents an end elevation on the line..
The fire chamber A is closed as regards the external air, except such as is admitted
through the air supply pipe or opening B, which may conveniently carry within
it the gas pipe C, to the burners D, the amount of gas and air admitted being
automatically regulated by air valves E, and gas taps F, or other regulating
devices governed by a connecting rod G, and lever H, as shown in Fig. 3, the
movement of the latter being governed by the pressure in the boiler in a manner
analogous to that shown in section in Fig. 1 in which the lever EI, is omitted and
steam from the boiler admitted to the top of the flexible diaphragm a in steam
chest I. As the boiler pressure increases diaphragma is depressed against the
pressure of spring &, and connecting rod G closes valves E and F to a greater or
lesser extent. Should the boiler pressure fall, spring braises rod G thereby opening
the valves and admitting an additional supply of gas and air to the burners D.
Said burners may he of the Bunsen, Argand flat or other type, (that with a
luminous flame being preferred) and are arranged to burn beneath an arch or layer
of asbestos or other refractory material J, perforated or laid so that the flame
and heat will raise it to a high temperature, and from thence pass around the tubes as
shown in Figs. 3 and 4 or through the tubes as shown in Figs. and 2 depending
upon which class of construction of boiler is adopted.
Above the vertical boiler and connected thereto at preferably at least four separate
points is a steam chest or drum K from which comparatively dry steam may
be drawn.
A convenient manner of connecting the steam drum to the boiler is by omitting
four or more fire tubes and connecting the drum to the steam spaces at the points
where these would come in the ordinary construction, as shown in Figs. 1 and 2.

page_text: For the horizontal boiler a single connection d from the steam space may be used,
which opens into one end L, of the drum which may be filled with porous or granular
material such as asbestos or other fibre or small beads or stones so that the steam in
passing through it will lose most of its moisture and reach the drum K in a
comparatively dry state. The heat from the fire chamber after passing around or
through the tubes is conducted away through suitable flues M, while the ordinary
automatic or other method of feeding the boiler is employed.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, 1 declare that what I claim is :-
1st. The improved means for automatically regulating the gas and air supply to the
fire chamber of steam boilers substantially as set forth.
2nd. In steam boilers the combination with the boiler of a fire chamber A, provided
with a refractory arch or layer J, substantially as and for the purposes set forth.
3rd. In combination with a steam boiler a steam drum K, substantially as described
and as represented in the accompanying drawings.
4th. The general arrangement and combination of parts forming the improvements
in and connected with steam boilers heated by gas, substantially as described.
Dated this 29th day of January 1887.
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London,
Applicant's Agent.