Improvements in Ventilators.
Year: 1892

page_text: Date of Application, 8th Nov., 1892-Accepted, 10th Dec., 1892
COMPLETE SPECIFICATION.
Improvements in Ventilators.
I, DAVID BARON of 107 Sussex Street, Broughton, Manchester, Chimney
Sweeper, do hereby declare the nature of my said invention-and-in-what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement :-
My invention has reference to that class of ventilator which is usually built into
the wall of a room or apartment and leads into a flue or chimney and my invention
has for its object to improve the ventilating properties of said ventilator and
to provide convenient means whereby the communication between the room
and flue may be closed when cleaning the flue to prevent soot entering the room.
And in order that my invention may be more readily understood and carried into
practical effect I have hereunto annexed a sheet of drawings illustrative of my
improvements and will now proceed to describe the same with the assistance of the
various figures and letters of reference marked thereon.
Fig. 1 is a front view (partly in section) and Figs. 2 and 3 transverse sectional
views of my improved ventilator. A designates the casing of the ventilator by
preference formed of sheet or cast iron with a sloping back A' terminating in
pipe A2 which opens into the flue or chimney. EE are a series of plates or shutters
arranged at suitable distances apart working on pins or studs F (see Fig. 4) and
connected together by the vertical strip G and hinges H. These shutters or plates
are so poised that the weight of the strip keeps them in the horizontal position as
illustrated in Fig. 1, but when it is intended to clean or sweep the chimney and
to prevent soot coming into the room or apartment being ventilated it is necessary
to operate the lever I and link J causing the said shutters or plates to close the
front of the ventilator by assuming a vertical position (as seen in Fig. 3). The
bottom shutter is rather wider than those above so that on assuming the horizontal
its rear portion closes the opening K and thus prevents any smoke passing from
the flue up through the ventilator.
On the other hand when cleaning of the flue or chimney is to take place and
the shutters are closed as seen in Fig. 3 the opening K is opened leaving a clear
passage through the ventilator and any soot falling down the chimney passes freely
through and does not enter the room.
It will be seen that by so forming the back of the ventilator a syphonic action
is produced upon the incoming or foul air from the room by the uptake of the
smoke.
The front of the ventilator is provided with a gridded plate L with a wide
edging to give a neat finish to the front of the ventilator when fitted into
the wall.
A bell crank lever and weight may be employed for retaining the shutters
horizontally and the lever I may be affixed direct to the strip G.
The pins on which the shutters are mounted are formed with a screw thread to
fix them in the sides of the ventilator with a plain portion left for the shutters to
ride on (see Fig. 4).
My improvements are equally applicable to ventilators for cold air Hues whether
employing forced draughts or otherwise and also to stove pipes leading into a flue
or chimney.
Having thus particularly described and 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 :-
A ventilator with sloping back A leading into a nine A$ opening into a flue or

page_text: .
chimney in combination with swivelling shutters or plates E E all mounted and
operating substantially as and for the purposes hereinbefore described and illustrated
on the accompanying drawing.