IMPROVEMENTS IN EXHAUST VENTILATORS
Year: 1884

page_text: I, GEORGE WILLIAM WEBB, of Reading in the County of Berkshire, Architect,
do hereby declare the nature of said Invention for IMPROVEMENTS IN EXHAUST
VENTILATORS, to be as follows:-
The improvements consist in the construction and arrangement of certain parts
to form exhaust ventilators, and the Invention may be performed by making the
various parts and constructing the ventilator substantially as follows reference
being had to the accompanying Drawing in which Fig. 1 is an elevation. Fig. 2 a
sectional elevation. Fig. 3 a cross sectional plan. Fig. 4 a plan top view-in all
the Figs. like letters represent like parts.
Four outside guards or plates A extending from the base to eaves on section;
also four smaller guards or plates B which may or may not be placed where shewn-
if used they are also carried up from the base to eaves as the plates A.
The chamber C may or may not be square and except at the angles is to be
wholly or partially made of perforated zinc, wire gauze, or any other metal more
or less perforated, the perforated stuff being taken right to the base on section; a
small gutter is made all round, so that if any moisture or fine snow should by any
means find its way in, it would run out again as fast as it collected. The four
smaller chambers E. E. E. E. are each made on three sides with metal the fourth
side or outside F is to be wholly or partially made with perforated zinc and as the
above chamber C with gutter &c. the same.
The uptake pipe G is directly under the central chamber C the pipe is then
funnelled out so as to embrace the whole of the other (4) chambers.
The vitiated air is conducted up the pipe G into each of the chambers and
sucked out as shewn by the arrows; whichever way the wind blows an equal
portion of the ventilator is always at work-as the air rushing through the narrow
slits H creates a partial vacuum and draws the foul air smoke &c. after it. If no
air is passing outside then all the chambers extract.
Dated this 1st day of January 1884

page_text: I, GEORGE WILLIAM WEBB Associate of the Royal Institute of British Architects
of Reading in the County of Berkshire Architect do hereby declare the nature of
my Invention for IMPROVEMENTS IN EXHAUST VENTILATORS and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
The improvements consist in the construction and arrangement of certain parts
to form exhaust ventilators and the Invention may be performed by making the
various parts and constructing the ventilator substantially as follows reference
being had to the accompanying Drawing in which Fig. 1 is an elevation Fig. 2 a
sectional elevation Fig. 3 a cross sectional plan Fig. 4 a plan top view in all the
Figs. like letters represent like parts. Four outside guards or plates A extending
from the base to eaves on section; also four smaller plates or guards B which may
or may not be placed where shown-if used they are also carried up from the base
to eaves as the plates A. The chamber C may or may not be square and except
at the angles is to be wholly or partially made of perforated zinc, wire gauze or
any other metal more or less perforated, the perforated stuff being taken right to
the base on section; a small gutter is made all round the inside so that if any
moisture or fine snow should by any means find its way in it would run out again
as fast as it collected. The four smaller chambers E E E E are each made on three
sides with metal the fourth side or outside F is to be wholly or partially made with
perforated zinc and as the above chamber C, with gutter &c. the same.
The uptake pipe G is directly under the central chamber C the pipe is then
funnelled out so as to embrace the whole of the other (4) chambers. The vitiated
air is conducted up the pipe G into each of the chambers and sucked out as shown
by the arrows, whichever way the wind blows an equal portion of the ventilator
is always at work-as the air rushing through the narrow slits H creates a partial
vacuum and draws the foul air smoke &c. after it. If no air is passing outside
then all the chambers extract.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I would state that I
do not confine myself to the precise details herein described or delineated as the
same may be varied without altering the characteristic nature of my Invention.
Neither do I claim the whole of the ventilator but only that which is new but
what I claim is the addition or combination of four chambers arranged round the
central chamber to gain increased extracting power all in the manner substantially
as described and as illustrated.
Doted this 2nd day of Santamber 100.4