A NEW OR IMPROVED SILENT AUTOMATIC THE VITIATED AIR FROM DWELLING EXHAUST VENTILATOR FOR EXTRACTING ROOMS, OFFICES AND ELSEWHERE
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
1, CHARLES KITE of Christopher Works, Chalton Street, Euston Road in the
County of Middlesex Ventilating and Sanatory Engineer do hereby declare the
nature of the said invention for "A NEW OR IMPROVED SILENT AUTOMATIC
THE VITIATED AIR FROM DWELLING
EXHAUST VENTILATOR FOR EXTRACTING
ROOMS, OFFICES AND ELSEWHERE," to be as follows:-
This Invention has for its object a new or improved silent exhaust ventilator for
extracting the vitiated air from dwelling rooms, offices and elsewhere.
Such improved exhaust ventilator combines simplicity and durability of
construction with great effectiveness in operation, and when fixed in a room or
elsewhere is free from unsightliness while it causes no inconvenience from draught
and from its improved construction affords great facilities for cleaning it from time
to time as required in order to prevent its becoming choked.
To carry out my invention I proceed as follows:-I make an external shell or
casing preferably of a longitudinal rectangular form (her-after termed "the
draught box") Such box consists of two side plates and of a top and bottom
plate, (hereafter termed "covering plates ")—all of which are flat. These plates
when soldered or otherwise fastened together form a rectangular cavity which
constitutes the front of the box and is surrounded by a rin or flange.
The two side plates extend backwards beyond the covering plates and so form
two arms to the ends whereof a concave plate (hereafter termed "the suction
plate") is soldered or otherwise attached thus forming two longitudinal openings
(hereafter termed suction slots) in the top and bottom of the box between the
covering plates and suction plate.
Affixed to the back edge of cach covering plate is a deflecting plate which
deflecting plates project outwards at any convenient angle leaving a longitudin 1
slot between them through which the vitiated air is drawn by the combined action
of the suction slots and suction plate.
I then fit such draught box with an adjustable automatic ventilator which
I construct in the following manner —I make a face plate (hereafter termed "the
screen" plate) of a suflicient size to cover the opening in the front of the draught
Lox and surrounded by a similar rim or flange to that formed round such box so

page_text: that when the ventilator is closed such flanges butt closely against each other-
Mounted on the back of this screen is a fraine of suitable dimensions to allow
of its readily sliding in and out of the front opening in the draught box with
which it corresponds in shape.
Slots or openings are formed in all four sides of such frame to allow of the
passage of the air therethrough both laterally and vertically while over the top
and bottom slots inclined guide plates are fitted which automatically promote and
control the escape of the vitiated atmosphere.
The intensity of the exhaust is readily augmented or diminished either by
opening or partially closing the ventilator so as to increase or minimise the current
as desired and while the escape of the air is thus rendered noiseless perfect
ventilation is attained The action of the ventilator may be controlled and
regulated by a suitable screw ur lever arrangement.
Preferably I fix my improved ventilating apparatus over the chimney breast
so as to ensure a good exhaust current but it may readily be fitted in any other
convenient position.
It is obvious that by decorating the external surface of the screen plate to match
the walls or otherwise it may be rendered either ornamental or nearly imperceptible
as preferred.
It is also evident that the cost of manufacture will be greatly reduced by making
both the draught box and ventilator each in a perfect separate casting.
Daind this 10th don of T1001

page_text: I CHARLES KITE of Christopher Works Chalton Street Euston Road in the
County of Middlesex Ventilating and Sanitary Engineer do hereby declare the
nature of my invention for "A NEW OR IMPROVED SILENT AUTOMATIC EXHAUST
VENTILATOR FOR EXTRACTING THE VITIATED AIR FROM DWELLING ROOMS OFFICES
AND ELSEWHERE" 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 a new or improved silent exhaust ventilator for
extracting the vitiated air from dwelling rooms, offices and elsewhere.
Such improved exhaust ventilator combines simplicity and durability of
construction with great effectiveness in operation, and when fixed in a room or
elsewhere is free from unsightliness while it causes no inconvenience from draught
and from its improved construction affords great facilities for cleaning it from time
to time as required in order to prevent its becoming choked.
And in order that my said invention may be better understood and readily carried
into effect I will now with the aid of the accompanying drawings whercon similar
letters of reference indicate corresponding parts proceed more particularly to
describe and ascertain the nature of my said invention.
To carry out my invention I proceed as follows I make an external shell or
casing (A) preferably of a longitudinal rectangular form (hereafter termed "the
draught box")-Such box consists of two side plates (b) and of a top and bottom
plate (c) (hereafter termed "covering plates")—all of which are flat These plates when
soldered or otherwise fastened together form a rectangular cavity which constitutes
tle front of the draught box and is surrounded by a rim or flange (a) as seen in
Fig 1 of the accompanying drawings which shews a view in front elevation
of such draught box.
The two side plates (b) extend backwards beyond the covering plates (c) and so
forin two arms to the ends whereof a concave plate (d) (hereafter terined tho
"suction plate") is sold red or otherwise attached thus forming two longitudinal
openings (e) (hereafter termed "suction slo's ") in the top and bottom of the box
between the covering plates (c) and suction plate (d) as seen in Fig 2 which shews
a plan view of such draught box.
Affixed to the back edge of each covering plate is a deflecting plate () which
deflecting plates terminate in or are fitted with beads (f') and project outwards at
any convenient angle leaving a longitudinal suction slot (g) between them through
which the vitiated air is drawn by the combined action of the suction slots (e)
and suction p'ate (d) as indicated by the arrows in Figs 1-2—3.
I then fit such draught box with a front box (B) that constitutes an adjustable
automatic ventilator and which I construct in the following manner. I make a
face plate () (hereafter termed the "screen plate") of a sufficient size to cover the
rectangular cavity in the front of the draught box already described and surrounded
by a similar rim or flange (¹) to that formed round such box so that when the
ventilator is closed such Banges butt closely against each other. A view in front
elevation of such front box is given at Fig 4 Mounted on the back of this screen
plate (h) are two side plates (i) and a top and bottom plate (k) thus forming a
front box corresponding in shape with the draught box and of suitable dimensions
to allow of its readily sliding in and out of the front opening in the latter as
indicated by dotted lines in Fig 8 which shews iny apparatus complete.
Slots or openings (1) are formed in all four sides of such front box to allow of the
passage of the air therethrough both laterally and vertically while over the top and

page_text: bottom slots inclined guide or balle plates (m) are fitted provided with beads (m²).
Such guide or bafile plates are seen at Fig 5 of the accompanying drawings which
shews a view in back elevation of the front box (B). When the ventilator is open
these baffle plates automatically promote and control the escape of the vitiated
atmosphere as indicated by the arrows in Fig 6 which shews a sectional elevation
of the front box (B) while Fig 7 shows a plan view thereof. Fig 8. shews a view
in side elevation of my improved silent automatic exhaust ventilator complete and
open The dotted lines in this Fig: indicate the outline of the front box (B) and
baffle plates (m) and also of the deflecting plates (f) in the draught box (A)
and the arrows indicate the direction of the exhaust current.
The intensity of the exhaust is readily augmented or diminished either by
opening or partially closing the ventilator so as to nuginent or diminish the current
passing through the openings or slots (l) and thus increase or minimise the current
as desired. By this improved construction not only is the escape of the air
rendered noiseless but perfect ventilation is obtained.
The ventilator is opened and closed by means of a screw rod n working through
a nut n' mounted on a narrow cross bar o the rod a being turned in or out as
desired by means of a cord and pulley p or a lever may be substituted for such
screw rod and workel in a similar manner or any other suitable mechanical
arrangement adopted for producing a similar result.
Preferably I fix my improved ventilating apparatus over the chimney breast so
as to ensure a good exhaust current but it may readily be fitted in any other
convenient position.
It is obvious that by decorating the external surface of the screen plate to match
the walls or otherwise it may be rendered either ornamental or nearly imperceptible
as preferred.
It is also evident that the cost of manufacture will be greatly reduced by
making both the draught box and venti'ntor cach in a perfect separate casting.
To clean the ventilator it is only necessary to draw out the front box from the
draught box in order to obtain ready and easy access to the interior so as to
thoroughly cleanse the same and thereby prevent its becoming ineffective in
operation or getting out of repair from being choked.
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 a silent automatic exhaust ventilator consisting of draught box (A)
provided with suction plate (d) openings (e. f. g) and deflecting plates and
beads (f.) together with the front box (B)-provided with screen plate (4)
openings () and baflle plates and beads (mm) all combined arranged and fitted
and actuated substantially in the manner and for the purposes hereinbefore
specified.
1