Improved ventilator and Chimney Cowl for MARGINS and Smoke from Buildings.
Year: 1886

page_text: Date of Application, 3rd May, 1886.
Complete Left, 8th Jan., 1887.
Complete Accepted, 5th Apr., 1887.
Improved ventilator and Chimney Cowl for MARGINS
and Smoke from Buildings.
I, JOSEPH RAINER, of 39 Finchley Road, Kennington, in the County of Surrey,
Foreman Metal Worker do hereby declare the nature of my invention for the above
to be as follows:-
The invention consists of a shaft any shape or dimensions at top of which is attached
a cone, the base of cone being twice the size of shaft. The cone is divided
vertically into six parts, three of which being open form upcast shafts. The top of
each opening stands above the main shaft and is turned inwards forming deflective
surface, therby turning the wind straight across the top of main shaft, the same being
met with additional current, gives great additional force thus extracting any foul air
or smoke within the Building.
The main cap or down draught preventer is a cone the section or outline being O G,
the plan being circular or any shape the same as main shaft, the underside of cap is
filled in with a piece of metal slightly concave kept up inch from bottom. The cap
may be any height, the Base being twice the diameter of main shaft; it is supported
by four brackets kept up from Lower cone a sufficient height to allow space for clear
passage of air.

page_text: COMPLETE SPECIFICATION.
Improved Ventilator and Chimney Cowl for Extracting Foul Air
and Smoke from Buildings.
I JOSEPH RAINER of No. 39 Finchley Road Kennington in the County of Surrey,
Foreman Metal Worker do hereby declare the nature of my invention for
EXTRACTION OF FOUL AIR & VENTILATION OF BUILDINGS &C. & CURE OF SMOKY
OHIMNEYS and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
The invention consists of a main shaft any given size & shape, at top of which is fixed
a cone the base being twice the diameter of shaft, the cone is divided vertically,
there being 3 openings at base tapering to 3 opening & 3 blanks at top, the openings
stand above the main shaft & are curved inwardly forming deflecting plates thus
directing the rush of air up the vertical openings in cone straight across the top of
main shaft ; the three blank spaces are opposite openings & and are cut down to level of
main shaft, & filled in flush so as not to impede the rush of air which being met with
straight current gives great additional force of air across the top of main shaft from
whatever direction the wind may blow, thus extracting any foul air within the building.
At top of main shaft & cone & standing well above is main cap or down draught
preventer being O. G. on section, the base being same shape as main shaft & twice
the diameter of same & is filled in on underside with metal plate slightly concave so as
to prevent any cold air remaining in cap the whole being attached to main shaft by
means of stays or brackets & so constructed that any down wind striking it causes
great additional up current in main shaft.
In the Drawing :-
Figure 1 is the general elevation.
A is main cap & down draught preventer.
d. d. d. are stays or brackets.
c. c. is cone with spaces at top cut down to level of main shaft forming blanks.
F is opening in conc, at top of which is deflecting plate.
B is main shaft.
Figure 2 is plan at top of cone, looking down, shewing blank spaces.

page_text: Having now particularly described & ascertained the nature of my said invention
& in what manner the same is to be performed, I declare that what I claim is
1. The openings in cone & the deflecting plates at top of each opening by which
means the slightest breath of air striking the main shaft is carried upwards & drawn
straight across the top of shaft which gives it a superiority over all other ventilators.
2. Novelty of construction of the Main Cap or Down draught preventor in which, the
greater the force of wind striking same in a downward direction, the greater the up-
current in main shaft.
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