Improvements relating to Gas Stoves, Ranges, and the like.
Year: 1893

page_text: The decision of the Comptroller-General, of the 21st day of November 1893, allowed,
under Section 18 of the Patents, &c. Act, 1888, an Amendment of this
Specification.
1.
1.
Improvements relating to Gas Stoves, Ranges, and the like.
WE, JOHN SCOTT and HARRY DARWIN, of 618 Eglinton Street, Glasgow,
and SAMUEL BROTHERS DARWIN, of 87 Commercial Road, Portsmouth, Gas
Engineers, 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 gas appliances, such as stoves, cooking ranges, ovens,
and the like, and it has mainly for its object to utilize some of the heat arising from
the ordinary gas flames for heating water or other fluids, or substances, contained
in a tank or vessel, located outside the stove, oven or the like.
And in order that our said invention may be properly understood we have
hereunto appended an explanatory sheet of drawings, whereon
Fig. 1 is a front elevation of a gas cooking range with our improvements applied
thereto.
Fig. 2 is a side elevation.
Fig. 3 is a side view of
water heater.
Fig. 4 is a longitudinal section of the heater Fig. 3.
Fig. 5 is a plan of the heater, Fig. 3.
Referring to the drawings, which show, by way of illustration, a cooking range
with water boiler attached.
a is the range which may be of any ordinary construction, bis the boiler which,
as shown, is fitted at one side, c is the support for the boiler, e, el are the usual gas
burners for heating the oven. is a multitubular heater which is, preferably, s0
located above or near to the gas jets e as to be heated by the spare heat given off
by them. The flames may, if desired, play through the tubes of the heater.
As will be seen from Figs. 3, 4 and 5, we prefer to make the heater in the form
of a tube which is pierced vertically with a number of holes in which the short
cross tubes fare fitted. Water from a reservoir or cistern, which is or may be
fitted above the boiler, or from other source, is admitted to the heater by the
branch g and passes along the tube f, and, in its passage, is heated by the flames, or
hot air or products of combustion, passing through the vertical tubes f¹. The hot
water passes out of the heater by the branch i and by the pipe connection into the
circulating boiler or tank b. Water from the boiler also passes down the pipe k
(shown partly in dotted lines) to the branch and heater. By this arrangement
a constant circulation is maintained and the water in the boiler is kept heated ready
for use.
lis a draw off cock. m is a pipe connection leading from the top of the boiler to
the supply cistern and allowing steam to escape thereto and be condensed, and m¹is
a pipe connection for supplying cold water from the cistern to the branch g of the
heater. is a screw plug for cleaning purposes.
The admission of water from the main to the supply cistern is, by preference,
automatically controlled by means of a ball, float or like suitable valve.

page_text: If desired two boilers b may be fitted one at each side of the gas range in this
case two heaters would, preferably, be employed one being fitted over the jets <
and the other over the jets e¹.
If desired two or more heaters may be located above or in proximity to the gas
flames.
The tubes can be arranged diagonally or horizontally, or some be diagonal,
and some horizontal or vertical, instead of all of them being fitted vertically in the
heater. In some cases the heater may be made without tubes or the tubes be
arranged longitudinally, but we prefer to use the construction shown.
It is to be understood that we do not confine ourselves to the precise form of
multitubular heater shown and described as it is manifest that various forms and
styles of multitubulur heaters, operating on the same general principle, can be
employed without departing from the spirit of the invention.
If so desired a steamer may be fitted on top of the boiler b..
If so desired the hot water from the heater may be made to circulate through
tubes fitted in the vessel in this case the vessel, which may be altered in
construction, may be used for heating or warming various substances or articles.
The presence of the henter within the oven does not impair the utility of the
gas jets for roasting purposes as it is of small dimensions and is heated only by a
part of the heat given off from the flames. It is not necessary that the flames
should come in contact with the metal surface of the heater.
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.- To
gas cooking stores, ranges, ovens and the like, the application and use of a
multitubular fluid heater which is located in the interior of the stove, oven or range.
and heated by the ordinary gas burners, substantially as herein before set forth.
2. In gas cooking stoves, ranges, ovens, and the like, the combination, with the
stove, oven, or range, of a boiler or vessel heated by means of one or more
multitubular heaters which is, or are, located within the range or oven and heated
by the heat from the gas burners, substantially as hereinbefore set forth.
3. The construction of heater, substantially as hereinbefore described and shown
at Figs. 3. 4 and 5 of the drawings annexed.
Dated this 15th day of March 1893.
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.