An Improvement in Hot Water Circulating Apparatus.
Year: 1892

page_text: Date of Application, 27th July, 1892
Complete Specification Left, 23rd Aug., 1892-Accepted, 8th Oct., 1892
PROVISIONAL SPECIFICATION.
An Improvement in Hot Water Circulating Apparatus.
I WILLIAM HENRY BUSHELL of 10 Forest Place Villas, Leytonstone, in the
County of Essex, Gentleman, do hereby declare the nature of this invention to be
as follows:-
My improvement in water heating and circulating apparatus for domestic and
other use, relates particularly to the water heater and it has for its object to lessen
the first cost, to increase the heating capacity and lessen the space occupied, and to
avoid the deposit of fur or incrustation within the heater which necessitates periodical
removal or impairs the durability of the apparatus. The capacity of the ordinary
boiler employed in such apparatus is such that the water is approximately stagnant
therein, nowithstanding the constant circulation maintained, and this combined
with the fact that it is frequently heated to boiling point greatly favors the deposit
of fur or incrustation.
According to my invention, I substitute for the ordinary boiler a pipe coiled
zig-zag fashion to and fro and extending around three sides of the fire grate, viz.,
the back and two sides, so as to present an extended area of heating surface to
immediate contact with the fire and so utilize to the utmost extent the available
heat whilst the capacity of the coil is relatively small, the sectional area being
substantially the same as that of any other part of the circulation system so that a
vigorous circulation of the water is continually maintained through the heating
coil, thus effectually preventing the deposit of any sediment whilst the temperature
is kept well below boiling point which is an important factor as by maintaining a
temperature of about 180° the formation of sediment does not occur and the water
is hot enough for any purpose for which it is likely to be required. The lower
member of the coil is of course connected with the return pipe and the upper
member with the flow pipe of the circulation system and a safety valve and draw-off
pipe are provided in connection with the latter, the draw-off pipe acting as a
means of catching and removing any sediment which may chance to form.
By placing the heating coil wholly within the fireplace so as to bring it into
direct contact with the incandescent fuel, the special flue necessary to bring the
flames into contact with the ordinary boiler is no longer required and hence the
principal cause of wasteful consumption of the fuel in ordinary kitchen ranges is.
removed.
Dated this 27th day of July 1892
W. H. BUSHELL,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.
COMPLETE SPECIFICATION.
An Improvement in Hot Water Circulating Apparatus.
I, WILLIAM HENRY BUSHELL of 10, Forest Place Villas, Leytonstone, in
the County of Essex, Gentleman, 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 :-
My improvement in water heating and circulating apparatus for domestic and
other use, relates particularly to the water heater and it has for its object to
lessen the first cost, to increase the heating capacity and lessen the space occupied,
and to avoid the deposit of fur or incrustation within the heater which necessitates
[Price 8d 3

page_text: periodical removal or impairs the durability of the apparatus. The capacity of
the ordinary boiler employed in such apparatus is such that the water is approxi-
mately stagnant therein, notwithstanding the constant circulation maintained, and
this combined with the fact that it is frequently heated to boiling point, greatly
favors the deposit of fur or incrustation.
My invention is illustrated in the accompanying drawing, forming part of this
Specification, which represents a perspective view of a kitchener provided with my
improved system of water heater.
According to my invention I substitute for the ordinary boiler an iron pipe A
coiled zig-zag fashion to and fro situated wholly within the fire grate and
extending around three sides thereof, viz.-the back B and the two sides B' B² so
as to present an extended area of heating surface to immediate contact with the fire
and so utilize, to the utmost extent, the available heat. The capacity of the coil is
relatively small, the sectional area of the pipe being substantially the same as
that of any other part of the circulation system, so that a vigorous circulation of
the water is continually maintained through the heating coil A thus effectually
preventing the deposit of any sediment whilst the temperature is kept well below
boiling point which is an important factor as by maintaining a temperature of
about 180° the formation of sediment does not occur and the water is hot enough
for any purpose for which it is likely to be required. The lower member a of the
coil is of course_connected with the return pipe C and the upper member a' with
the flow pipe D of the circulation system. These circulation pipes may be
arranged in any convenient way to suit the circumstances of the case. A safety
valve E and a draw-off cock F are connected by pipes e and f with the flow pipe D,
the safety valve being either placed in a flue or it may be brought through the
coving into a position directly above the fire, so that when it acts, the water
escaping thercat will put out the fire. The draw-off pipe acts as a means of
catching and removing any particles of rust or dirt in the water as it passes
towards the flow pipe C. By placing the heating coil A wholly within the fire-
place so as to bring it into direct contact with the incandescent fuel, the special flue
necessary to bring the flames into contact with the ordinary boiler is no longer
required and hence the principal cause of wasteful consumption of the fuel in
ordinary kitchen ranges is removed.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
In a hot water circulation system, a water heater and circulator composed of a
zig-zag coil of pipe situated within and extending to and fro around three sides of
the fireplace, substantially as specified.
Dated this 93rd day of Avavat 7000
W. H. BUSHELL,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.