Improvements in and connected with Hot Water Circulating - Boilers for Kitchen Ranges.
Year: 1896

page_text: Date of Application, 22nd May, 1896-Accepted, 27th June, 1896
COMPLETE SPECIFICATION.
Improvements in and connected with Hot Water Circulating -
Boilers for Kitchen Ranges.
I, CHARLES BODDY, of 1, Osborne Street, Didsbury, in the County of
Lancaster, Builder, 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 improvements in and connected with hot water
circulating boilers for kitchen ranges and has for its object to form a combination
back and bath boiler hot water supply, whereby an ample supply of hot water
can be obtained with perfect freedom from all danger of boiler explosions.
And in order that my invention may be more fully understood I have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. is a sectional front view, Fig. 2 a sectional side view and Fig. 3 a
sectional plan of a kitchen range provided with my improvements.
Figs. 4 & 4 are sectional side views of two modifications of my invention.
Fig. 5 is a front view of a kitchen range shown in connection with the water
supply tank and hot water circulating cylinder arranged in accordance with my
invention and
Fig. 5 a plan of the hot water circulating cylinder alone.
In carrying out my invention and referring to Figs. 1, 2 & 3, I form the back
boiler a in shape so as to give the greatest amount of heating surface and with a
cover having a loose lid and steam vent holes c at the back to induce a good
draught and thus form a low pressure boiler. It is formed at its bottom with
feet a' and so built into the back of the kitchen firegrate as to present the largest
amount of heating surface, its front projecting into the grate and its bottom and
back forming a part of a wide flue d, which contracts to an ordinary size flue di
above the level of the boiler a, which flue is furnished with a damper to regulate
the draught.
e,
Inside the back boiler a is placed a bath boiler which may be a tubular coil,
as shown in Figs. 1, 2 & 3, or a cylinder, as shown in Fig. 4, connected by pipes f
&g to the water cistern and the circulating cylinder i respectively, to the top
of which latter is fitted a low pressure valve k, k, see Figs. 5 & 5, the plug
of which is hollow and perforated, so that should there be an excess of pressure
generated in the cylinder the valve plug kl will rise and allow the steam and hot
water picked up thereby to escape through the said perforations and rush into the
receptacle formed on the top of the circulating cylinder i, from whence it may
run into the supply cistern or any other convenient place.
To prevent the circulating cylinder i and pipes from becoming cold when the
fire has been allowed to die out, particularly in intensely frosty weather and thus
prevent freezing of the pipes I 'enclose the same in a wooden case, see Fig. 54,
the space between which I fill with fibrous plaster or other heat preserving
material.
The back boiler a is supplied with water and the bath boiler e constantly
immersed thereby so as to get a double effect in heating and at the same time
obviate explosions as the loose lid and vent holes c will prevent the temperature
of the water in the back boiler rising above boiling point and the water in the
bath boiler e being heated by the back boiler water its temperature can never
exceed that of the back boiler.

page_text: It will thus be readily seen that by this system of heating, the water can never
reach more than boiling point, hence the freedom of boiler explosions, freezing up
and crustation.
The back boiler a may be supplied with water either by hand and the lid b',
or from a service cistern and ball tap fed from the hot water circulating
pipe g.
A modification of my invention consists in dispensing with the supply of water
in the back boiler a and forming its front, bottom and back with perforations a²,
see Fig. 5, so as to allow of the bath boiler e becoming enveloped with hot air
and not being in actual contact with the fire is rendered more durable.
In lieu of curving the front of the back boiler, as shown in Figs. 1, 2, 3 & 4, it
may be formed angular, as shown in Fig. 4^.
The said back boiler may be made out of cast or wrought iron also the flue d
behind the same.
The immersed or bath boiler e may be made of copper or iron tubing or other
material formed in cylindrical or other shape placed in vertical or horizontal
position. The same may be made in cylindrical form out of sheet copper with
flat or concave ends or in square or oblong shape adapted to the sizes of the
interior of the back boiler. Whatever shape is adopted, the usual attachments for
any size of piping for circulating hot and cold water as may be required. are
provided.
The valve k, k', fixed on the top of the circulating cylinder is of such
constructional form that it will act simply and effectually when the high degree
of heat is attained in the cylinder to ease the pressure required and cannot possibly
get out of working order or be tampered with.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim, is-
"In and connected with hot water circulating boilers for kitchen ranges."
1st. A back boiler having a loose lid and vent openings, in combination with a
bath supply circulating boiler immersed in water in the said back boiler, all
substantially as and for the purpose set forth.
2nd. A back boiler, as specified in the preceding claim, the bottom and back of
which is directly exposed to a flue leading from the fire grate to the chimney and
into which the steam from the back boiler can escape, all substantially as and for
the purpose set forth.
3rd. The hot water circulating cylinder i furnished with a steam escape
valve k, k', and formed with a receptacle around the same, substantially as and
for the purpose set forth.
4th. The bath supply circulating boiler, specified in Claim 1, surrounded by a
perforated casing a, all substantially as and for the purpose set forth.
Dated this 20th day of May 1896.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.