Improvements in Apparatus for Heating Air or other Gases...
Year: 1895

page_text: Date of Application. 26th Mar., 1895
Date of Application. 26th Mar., 1895
Complete Specification Left, 27th Dec., 1893—Accepted, 22nd Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Heating Air or other Gases...
We, GEORGE SEAGRAVE of Bellevue House Forest Road, Walthamstow in
the County of Essex, Engineer and SAMUEL BOURNE BEVINGTON of Neckenger
Mills, Bermondsey in the County of Surrey, Leather Manufacturer and Colonel
of Volunteers, do hereby declare the nature of this invention to be as follows:-
This invention has for its object to provide apparatus whereby air or other gases
can be heated in a rapid and efficient manner the heating agent being utilized to
the best advantage and the apparatus being very durable and not liable to be readily
injured by the fire or heating agent. According to this invention in an outer
structure stove or chamber which may be of brick or iron or other suitable
material there is provided a number of divisions or plates preferably of cast
iron so disposed that they afford, between them, passages alternately for the
heating agent and the air or gas to be heated.
The chamber is heated by the products of combustion from a furnace at the
lower part of the said chamber the roof of the said furnace being preferably
somewhat arched and protected from the heated products from the fire the
divisions or plates above being also somewhat arched to correspond. The first
of the divisions just above the furnace may also be similarly protected from the
products from the fire.
The divisious or plates are in pairs closed at their ends and extending only
partly through the chamber so as to leave alternately at each end of the
chamber passages for the products from the furnace upward between each pair
of divisions or plates in a to and fro or zig zag manner.
The spaces between the pairs of divisions or plates are put in communication by
means of passages made in the walls of the chamber alternately at opposite sides
and the air or gas inlet and the outlet therefor are so arranged that the air or gas
to be heated enters at the upper end of the chamber where the products of
combustion leave and the air or gas after being heated leaves at, or about, the
point where the products of combustion first enter from the furnace the air or gas
and the products of combustion thus passing in reverse directions through the
apparatus. The air or gas passages preferably enlarge from the inlet downwards
and the passages for the products of combustion preferably enlarge from the bottom
upwards or the inlets in each case may be made smaller than the outlets the
passages in the apparatus itself being the same size or not as desired. The products
of combustion may be drawn through the apparatus by a chimney or by a fan. The
furnace is preferably provided with hollow fire bars through which air passes to
tend to cool the bars and at the same time to become heated and to pass in this
heated state through the bridge and out at the top or side thereof so as to assist in
consuming the products from the furnace or the said heated air may be conducted
into the air passage through the chamber.
Dated this 26th day of March 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.

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COMPLETE SPECIFICATION.
Improvements in Apparatus for Heating Air or other Gases.
We, GEORGE SEAGRAVE, of Bellevue House, Forest Road, Walthamstow, in
the County of Essex, Engineer, and SAMUEL BOURNE BEVINGTON, of Neckinger
Mills, Bermondsey, in the County of Surrey, Leather Manufacturer and Colonel
of Volunteers, 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 has for its object to provide apparatus whereby air or other gases
can be heated in a rapid and efficient manner, the heating agent being utilised to
the best advantage and the apparatus being very durable and not liable to be
readily injured by the fire or heating agent.
According to this invention in an outer structure stove or chamber which may be
of brick or iron or other suitable material there is provided a number of divisions
or plates preferably of cast iron so disposed that they afford between them passages
alternately for the heating agent and the air or gas to be heated.
The chamber is heated by the products of combustion from a furnace at the
lower part of the said chamber, the roof of the said furnace being preferably
somewhat arched and protected from the heated products from the fire, the
divisions or plates above being also somewhat arched to correspond. The first of
the divisions just above the furnace may also be similarly protected from the
products from the fire.
The divisions or plates are in pairs closed at their ends and extending only partly
through the chamber so as to leave alternately at each end of the chamber passages
for the products from the furnace upward between each pair of divisions or plates
in a to and fro or zig zag manner. The spaces between the pairs of divisions or
plates are put in communication by means of passages made in the walls of the
chamber alternately at opposite sides and the air or gas inlet and the outlet
therefor are so arranged that the air or gas to be heated enters at the upper end of
the chamber where the products of combustion leave and the air or gas after being
heated leaves at or about the point where the products of combustion first enter
from the furnace the air or gas and the products of combustion thus passing in reverse
directions through the apparatus.
The air or gas passages preferably enlarge from the inlet downwards and the
passages for the products of combustion preferably enlarge from the bottom upwards
or the inlets in each case may be made smaller than the outlets, the passages in the
apparatus itself being the same size or not as desired. The products of combustion
may be drawn through the apparatus by a chimney or by a fan. The furnace is
preferably provided with hollow fire bars through which air passes to tend to cool
the bars and at the same time to become heated and to pass in this heated state
through the bridge and out at the top or side thereof so as to assist in consuming
the products from the furnace, or the said heated air may be conducted into the air
passage through the chamber.
Our invention is represented in the annexed drawings.
Figure 1 transverse section. Figure 2 longitudinal section of structure for
heating large volumes of air in full strata.
Figure 3 transverse section. Figure 4 longitudinal section of structure for
heating thin strata of air.
The same letters refer to the same parts in the various figures of the drawings.
A furnace with zig zag flue B rising to top of structure for the spent products
of combustion to escape from the uptake C.
The furnace A has hollow bars D of oval shape in cross section for leading
heated air into the chamber E in the bridge F, above which it commingles with

page_text: the flame and smoke and produces a highly heated gas which ignites in the back or
gas chamber G and imparts its heat while passing upwardly in the upper flues B.
until all or nearly all the heat giving properties are utilised while in transit, so that.
little else than a thin body of vapour escapes.
The zig zag passages H, H, formed of divisions or plates resting on one another
are the air conduits, the entry being at I and the outlet at J where a suction fan.
can be arranged, or at any reasonable distance for drawing the air through and
from the conduits and for forcing it in any required direction for heated air drying.
purposes.
The end of the conduits are connected anglewise by passages H₁ as indicated by
dotted lines, Figures 2 and 4.
To replenish the supply of fresh oxygen in the bridge chamber E such as from.
the ashpit in a less heated condition, we run a passage K if found desirable through.
the base of the bridge into the chamber E.
The furnace flues and the air or gases conduits are arched to concentrate the
greater heat towards the centres which as they roll along become evenly and.
efficiently heated.
At Figures 1 and 2 the structure is mostly of iron formed in divisions with end
bends L, L, for angularly connecting the air conduits and each division when.
dropped on one another form the passages for uprising products of combustion
capable of removal for renewal in an easy manner should one become faulty from.
any cause, this being readily accomplished by taking off the top cover M, Figures 1.
and 2, or by sliding them out through slots in the brickwork, Figures 3 and 4.
The air as indicated by the dotted arrows not only moves through the conduits.
at right angles to the products of combustion in the flues but becomes rapidly
warmed and then heated until it is intensely hot before being drawn away by the
fan at or near to J.
The structure is complete in itself and can be mounted upon wheels to be turned
about and set in any desired position for use for the various conditions of trade for
which it can be used. Such a structure or apparatus is of special use in supplying
heated air to dormitories, for warming buildings, for disinfecting clothing, for
drying clothes in laundries, for evaporating moisture from skins in process of
manufacture for leather, for drying cereals etc. where a warm dry air of any
desired temperature is necessary.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed we declare that what we
claim is :-
The apparatus shown on the annexed drawings composed of divisions or plates.
connected by angular passages through which air or gases can be drawn or heated
while travelling downwards through zig zag conduits at right angles to uprising-
products of combustion also passing through zig zag passages from a furnace, as.
set forth.
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2005
H. GARDNER,
Patent Agent, 166 Fleet Street, London,
Agent for the said George Seagrave and Samuel Bourne Bevington..