Improvements in Water Heaters for Baths
Year: 1899

page_text: Date of Application, 25th Aug., 1899-Accepted, 28th Oct.,
1899
COMPLETE SPECIFICATION.
Improvements in Water Heaters for Baths,
I, ALBERT PROST, of 4 and 6, Rue de Lappe, Paris, in the Republic of France,
Manufacturer, 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 subject of the present invention is an apparatus for heating baths so
arranged as to utilize the greater portion of the heat developed by the com-
bustion of wood or coal, for.raising a current of cold water from the town mains
or from a reservoir to a high temperature.
The annexed drawing, which is given by way of example, illustrates one form
or modification of the invention.
In this drawing:-
Fig. 1 is a vertical section through the boiler or heater.
Fig. 2 is a perspective view of the grating of the fire-place and of the base,
stand, or pedestal.
The boiler or heater formed of metal plate, is composed of two cylinders A
and B, placed concentrically the one with respect to the other, the annular space
or clearance comprised between the two cylinders being hermetically closed both
at the top and bottom.
This arrangement of concentric cylinders is fixed upon a base, stand, or pedestal J,
preferably formed of cast metal and provided with a circular aperture upon which
is placed a grating I. The base, stand, or pedestal is supported upon feet W,
and has fixed to its lower face, two slides L which support the edges of a drawer K
which latter is free to slide or move in the said slides, the said drawer forming
the ash pit or tray.
The arrangement of concentric cylinders is provided, moreover, with an aper-
ture G through which the fuel or combustible is introduced into the fire-place
or furnace, and which may be closed by a suitable metal door.
In the interior of the cylinder 13 are fixed hollow plates D, of a concave shape
towards the bottom, and hollow.plates E in the form of lenses, these plates being
located the ones above the others alternately as is shown in Fig. 1, and com-
municating from one neighbouring place to another through alternate vertical pipes
or conduits. Upon the lower plate D is provided a tubular branched connecting
piece R which is placed in communication with a water conduit containing water
under pressure, and the upper plate E communicates through a tube S, with
the space or clearance situated between the two concentric cylinders A and B.
A short pipe or tube T is fixed in the external wall of the cylinder A to which
may be connected the pipe of the shower bath.
The upper extremity of the apparatus is provided with a lid or cover O, having
an aperture or hole P which may be fitted with a pipe to carry away the smoke
or waste products of combustion.
The fuel or combustible introduced by the door G rests upon the grating I,
and the residue of combustion falls into the ash pan or pit K.

page_text: The size of the fire-place or furnace F permits of either wood or coal being
utilized for rapid heating.
The feed of water under pressure from the mains or from an elevated reservoir,
is effected through the pipe with connecting piece or coupling R provided on
the lowermost plate D, which latter is located directly above the fire, it then
passes through all the plates, and enters into the annular space or clearance
provided between the two concentric cylinders through the short tube S.
The watery vapours contained in the combustible which become condensed
during the operation of the apparatus upon the internal walls of the cylinder B,
fall into a trough M provided above the fire-place or furnace, and the condensed
water is drawn off through a pipe or tube N, which passes through the two
cylinders A and B, tight joints being made at such points of intersection, and
conducts the said condensation water outside the fire-place or furnace.
The arrangement of the plates above the fire-place or furnace gives a very
large heating surface, and obliges the burnt gases formed in the said fire-place
or furnace to pass up through a winding passage, or take a zig-zag course, before
escaping, which has the effect of utilizing almost the whole of the heat produced.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1: The application of a fire-place or furnace for wood or coal to all systems
of instantaneous bath heating apparati ordinarily heated by means of gas, petro-
leum, or otherwise.
2: A bath heating apparatus, fed by wood or coal, so arranged as to utilize
the major portion of the heat developed, for the heating of a current of water
under pressure from the town mains, or from a reservoir, characterised by two
concentric cylinders A and B, so connected together that the annular space or
clearance comprised between them be hermetically sealed, these cylinders being
placed upon a base, stand, or pedestal preferably formed of cast metal, and pro-
vided with an aperture upon which is placed the grating I, and having an ash-
pan or pit K, hollow plates of a concave form, and of a lense shaped form, which
are placed in the internal cylinder, in an alternate manner, and which communi-
cate together from one neighbouring place to another by connecting pipes or
conduits, the lower plate receiving the water under pressure through a short
pipe R, and the upper plate communicating through a short pipe S with the
annular space or clearance comprised between the concentric cylinders, so that
the water which circulates in the various plates may be able to pass into the
said annular space or clearance to be drawn off or discharged, in a heated condition,
through a short tube T to which may be connected the pipe of the shower-bath,
the concentric cylinders being surmounted by a lid or cover provided with an
opening or aperture for receiving a chimney or uptake, substantially as herein-
above described and illustrated in the annexed drawing.
Dated this 25th 1….. of A 1000
J. P. BAYLY,
18, Fulham Place, London, W., Agent for the Applicant.