Improvements in and Apparatus for Ventilating Ships, Railway Carriages, Vehicles, Buildings, and the like.
Year: 1894

page_text: Date of Application, 27th Apr., 1894
Complete Specification Left, 25th Jan., 1895-Accepted, 13th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in and Apparatus for Ventilating Ships, Railway
Carriages, Vehicles, Buildings, and the like.
WILLIAM BEVITT Hazelhurst Romford Essex, Engineer do hereby declare the
nature of this invention to be as follows :-
This invention has for its object the withdrawal of foul air from ships, railway-
carriages, vehicles, buildings and the like, but more particularly from vehicles in
motion, and consists of a double or single bell-mouthed tube-by preference
oblong-placed horizontally and tapering gradually up to the point of contact with
the upeast shaft or pipe, which upcast shaft or pipe is also made bell-mouthed and
tapered up to the point of contact with the horizontal tube, so that the contracted
parts of each tube-placed by preference at right angles-come together, and are
so arranged that the horizontal tube catching the air causes a sharp current to pass
by the contracted part of the upcast shaft or pipe, thus causing a vacuum in the
said shaft or pipe which automatically draws the foul air from the compartment
to which the upcast shaft or pipe communicates.
Improvements in and Apparatus for Ventilating Ships, Railway
Carriages, Vehicles, Buildings, and the like.
I, WILLIAM BEVITT of Hazelhurst, Romford Essex, Engineer, 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 :-
This invention has for its object the withdrawal of foul or heated air or steam
from ships, railway-carriages, vehicles buildings etc. but more particularly for
vehicles in motion, and consists of a double or single bell-mouth tube, by preference
oblong, placed horizontally, and tapering gradually up to the point of contact with
the upeast shaft or pipe, which is also tapered up to the point of contact with the
horizontal tube, so that the contracted parts of each tube-placed by preference at
right angles-come together, and are so arranged that the horizontal tube catching
the air causes a sharp current to pass by the contracted part of the upcast shaft or
pipe, thus causing a vacuum in the said shaft or pipe, which automatically draws
the foul air from the compartment to which the upcast shaft or pipe communicates.
Fig. 1 is an elevation, and Fig. 2. a plan shewing a modified form of my
improved ventilator suitable for railway-carriages, tram cars or other like moving
vehicles.
A. A represents a portion of the top of the carriage. The ventilators may be
fixed on the top, sides, or in any suitable position.
The arrows indicate the direction of the wind into the bell-mouth, and the in-rush
of vitiated air on its way to the outlet.

page_text: Having thus 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 :-
1st. The improved automatic ventilator having the contracted parts of the
uptake shaft or pipe and the horizontal bell-mouth piece coming in contact with
each other-by preference at right angles-so that the action of the wind rushing
through the horizontal tube causes the vitiated air to ascend the uptake shaft or
pipe, and to be carried away through the outlet.
Dated this 25th day of January 1895.
WM. BEVITT.