Improvements in and connected with Ventilation, the Screening or Filtering of Air and Heating of the same by Means of Gas or Oil or by Coal or Coke Fire.
Year: 1896

page_text: Date of Application, 3rd June, 1895
Complete Specification Left, 26th Feb., 1897-Accepted, 27th Mar., 1897
PROVISIONAL SPECIFICATION.
Improvements in and connected with Ventilation, the Screening or
Filtering of Air and Heating of the same by Means of Gas or
Oil or by Coal or Coke Fire.
WILLIAM BIRCH 13 Holland Place Highfield Sheffield Caretaker, at Trinity
Wesleyan Church do hereby declare the nature of this invention to be as follows:-
This is an invention for screening or filtering from impurities, and also heating,
air as it passes into any room, compartment or building (hereinafter called A) and
for heating the air contained in (A).
The air is screened by passing through a porous or perforated frame or box filled
with cotton wool or similar material, and so constructed that the filling is firmly held
in its proper place, thus allowing the frame or box to be placed in any position.
The air is heated by means of one or more compartments (called B) in which gas
or oil is burning, and around or over which the air is made to pass in an outer
compartment (called C). The inlet and outlet to (B) are entirely separate from the
inlet and outlet to (C).
The air from (B) is carried outside (A) the air from (C) is admitted into (A).
When coal or coke is used, the air passes through one or more compartments
called (D).
Through which tubes or cylinders also pass from the fire into a smoke box or
flew called (E) an air chamber is also formed at the back of, or outside (E)
called (F).
The inlet to (D) and (F) may be from the outside of (A) or from the inside
of (A)
Improvements in and connected with Ventilation, the Screening or
Filtering of Air and Heating of the same by Means of Gas or
Oil or by Coal or Coke Fire.
I, WILLIAM BIRCH of No. 13 Holland Place, Highfields, in the City of Sheffield,
Caretaker, 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 object of my invention is to remove the material impurities from air before its

page_text: passage through a specially constructed heating apparatus and its delivery into any
room wherein the temperature is desired to be raised. The heating medium may be
gas, oil or solid fuel according to requirements and variety of apparatus employed.
In carrying my invention into practical effect say by means of gas, I proceed as
follows:-
I provide a metal casing, or build up in several sections such a casing wherein
compartments are formed to receive atmospheric gas burners, also chambers and
tubes to carry away the products of combustion, while around & above said
compartments are left cavities or spaces wherein the air to be heated is brought into
contact with the heated outer surfaces of the first named compartments; the two sets
of passages and cavities being kept perfectly distinct and separate to prevent
contamination of the air to be heated by the products of combustion of the fuel
employed. The air to be heated may be withdrawn from the room itself, thereby
assisting ventilation or when preferred air may be drawn from an external source
and discharged in either case direct into the room and so assist ventilation by
displacement as is well understood.
To effect the purification of such air I place in or in connection with the inlet
passage or air way perforated boxes or frames filled with cotton wool or similar
fibrous material held firmly in position by means of cross bars spikes or other
suitable means: while to better diffuse the heat produced by combustion I insert or
fix in the outlet pipe, flue or chamber conveying the products of combustion to
the outer air, sheets or layers of wire gauze. The action of the atmospheric
burners may likewise be assisted by the use therewith of so called "asbestos fuel"
placed within the combustion chambers, all such chambers and the outlet pipe
therefrom to the external air being as far as possible surrounded by air in process
of being heated and on its way into the desired room or space wherein it is to
be utilised.
When oil or solid fuel is used, I modify the combustion chambers so that the
resultant heat shall enter directly therein on the underside of the first chamber and
cause the heat to pass along the whole series to the discharge pipe as before. In
some cases the waste pipe may be of coil shape to extend the heat diffusing surface
as much as possible. Likewise when solid fuel is used the parts exposed to the
more intense action of the fire may be partially lined or protected with fire-clay
or other refractory material.
And now in order that my invention may be more clearly understood, I will now
further describe the same by reference to the drawings hereunto annexed: wherein
Fig. 1, is a sectional elevation of an apparatus built up in two sections or parts.
Fig. 2, is an end view of the same, also partly in section. Fig. 3, is a top view of
the same.
Fig. 4, is an end elevation of an apparatus applicable for an oil lamp.
Fig. 5, illustrates an air purifying frame with hinged cover suitable for fixing
directly under apparatus.
The same letters are used for corresponding parts in all the figures.
A, is the space containing the pure air to be heated. B, is the space admitting
air to the burner and combustion chamber, and may be connected to the apartment
for the withdrawal therefrem of vitiated air. C, is the atmospheric gas burner
fixed inside of first combustion chamber, said chamber may be partially filled with
"asbestos fuel" as is well understood. D, represents a few layers of wire gauze
placed over the outlet from combustion chamber. E, E, are deflecting partitions to
cause the products of combustion to circulate through the several tubes F, in the
direction of the arrows to the outlet opening G, from which a continuation is made
to the external air. H, is an extra portion or section fitted on the top, any required
number may be added and still leave the same cross area for air passage A.
I, Fig. 4, is an opening formed in the underside of combustion chamber for the
introduction of a mineral oil lamp or the like. K, Fig. 5, is a frame for cotton
wool with its hinged lid L; this frame may he fixed in any convenient position
between the fresh air supply and the chamber A, of the apparatus.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and the manner the same is to be performed, 1 declare that what I
claim is :-
1st. The construction and formation of an apparatus consisting of combustion and
air chambers made up in one or more parts and adapted for warming air by means of
atmospheric gas burners, substantially as described and illustrated by Figs. 1-2-3.
2nd. The mode of warming air by means of mineral oil lamps substantially as
described and illustrated by Fig. 4.
3rd. The formation and use of frames having spikes and the like to retain the
fibrous purifying medium in position and fixed in a warming apparatus in or near the
inlet air pipe as and for the purposes described, substantially as herein specified and
illustrated by Fig. 5.
ISAAC BECK,
Consulting Engineer and Fellow of Society of Patent Agents,
Haymarket Chambers, Sheffield, Agent for the Applicant.