Improved Apparatus for Purifying the Air of Rooms.
Year: 1896

page_text: Date of Application, 23rd June, 1896
Complete Specification Left, 21st July, 1896-Accepted, 31st Oct., 1896
PROVISIONAL SPECIFICATION.
Improved Apparatus for Purifying the Air of Rooms.
WILLIAM JAMES WILSON, 113 St. Helen's Road, Swansea House Decorator
do hereby declare the nature of this invention to be as follows:-
It consists of a cylindrical box or case, about 5 by 4 inches, made of sheet brass
or tin. This box contains 2 compartments, an upper & a lower, separated by a
sheet of brass or tin, perforated with numerous round apertures about in. in diam.,
which forms the floor of the upper & the roof of the lower compartment; and this
latter is again divided into an upper & a lower part by a horizontally placed sheet
of fine metallic gauze. The floor of the lower compartment is perforated in a
similar way to the floor of the upper one. The upper compartment contains loose
powdered unslacked lime. In the upper division of the lower compartment, resting
on the plate of metallic gauze is a solid cake of absorbent material made by treating
a mixture of powdered boxwood charcoal, caustic baryta, caustic potash & unslacked
lime with a minimal quantity of water. The action is as follows-It is so fixed in
the ceiling of a dwelling-room that only the lower compartment projects into the
room the heated impure air rising to the ceiling passes through the perforated
floor & the carbonic anhydride & other gaseous impurities are absorbed by the cake
of absorbent material, any excess of carbonic anhydride passing through this is
taken up by the lime in the upper case.
Dated this 24th day of July 1896.
WILLIAM JAMES WILSON.
WILLIAM JAMES WILSON 113 St. Helen's Road Swansea South Wales House
Decorator 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 patent room purifier is a case or box of sheet brass or tin, composed of two
cells or compartments placed vertically above one another; the upper cell, which
is the longer and the narrower, fits by screw into the lower cell which is broader &
shorter. The metallic plate, which forms the floor of the upper and the roof of
the lower cell, is perforated with numerous circular apertures about inch in
diameter, so that there is comparatively free communication between the two cells.
The lower cell is itself divided into two portions, by a fine-meshed metallic plate
of gauze, on this gauze plate, the surface of which is slightly curved with the
convexity uppermost, is placed the absorbent mass hereafter described; the lower
compartment is empty; the floor of the lower cell is a plate perforated similarly
to the one forming the floor of the upper cell; through these latter perforations
the air to be purified obtains access, after passing through the empty compartment
& the gauze plate, to the absorbing mass.

page_text: The upper cell is closed by a moveable cap, which permits refilling. The lower
cell has also a cap fitting over the perforated floor; this lower cap is simply a
protective against dirt, &c., and is removed before the apparatus is put in action.
The absorbent material is thus constituted-caustic baryta, 1 part, caustic
potash 1 part, caustic lime I part; powdered boxwood charcoal 9 parts, made into
a paste with the least amount sufficient of ordinary water-this paste sets into a
solid cake which is fitted closely into the upper compartment of the lower cell,
resting upon the gauze. The upper cell is half filled with dry powdered caustic
lime.
The apparatus when charged, is intended to be fixed into the ceiling of a
dwelling-room in such a manner that the lower case only projects into the room
below the ceiling level. The lower cap is then removed.
The heated and impure air which rises naturally towards the ceiling of any
inhabited room will then pass through the perforated bottom of the lower case &
into the absorbent cake which will absorb & decompose the carbonic anhydride &
the other organic gaseous impurities. Any surplus of carbonic anhydride which
escapes through the solid cake will be arrested & absorbed in the loose powdered
caustic lime in the upper case.
Fig. 1. The apparatus closed.
Fig. 2. The apparatus with its several parts detached.
Fig. 3. The apparatus as fixed in the ceiling.
A. Cap closing upper cell. B. Upper cell. C. Screw. D. Protective cap
closing lower cell. E. Lower cell. F. Gauze plate. b. Perforated floor of upper
cell. e. Perforated floor of lower cell. g. Extra perforations in lower cell.
Having now particularly described & 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
An apparatus constructed of brass or tin in the form of a case or box, in size
about 5 inches by 3 inches; which case consists of two superimposed compartments
the division between them being perforated so as to admit of the passage of air
from the lower to the upper; the floor of the lower compartment being also
perforated allows the passage of the external air first into this lower compartment
& so into the upper one. In these two compartments of this apparatus are placed
certain chemical substances-viz. in the lower one a mixture of caustic baryta,
caustic potash, caustic lime, charcoal & water; and in the upper one caustic lime.
I claim that when my improved apparatus is so fixed in the ceiling of a dwelling
room that the perforated floor of the lower compartment looks towards & projects
into the room, that the heated impure air of the room passes into the apparatus &
is deprived by the chemical substances therein of its gaseous & organic impurities.
Dated this 1st day of October 1896.
WILLIAM JAMES WILSON.