Improvements in Ventilators or Ventilating Cowls.
Year: 1891

page_text: Date of Application, 16th Feb., 1891
Complete Specification Left, 11th Nov., 1891-Accepted, 19th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Ventilators or Ventilating Cowls.
We, THOMAS OLIPHANT HUNTER HENDRY, of 61 Esplanade Greenock
Scotland Clerk, and JOHN WILKINSON, of Imperial Buildings Ludgate Circus,
London E.C. Gentleman, do hereby declare the nature of this invention to be as
follows:-
"
This invention relates to that class of ventilators or ventilating cowls by which
an up draught is obtained in the shaft or chimney by the movement of the outside
atmospheric air past or over the exit of the vitiated air or smoke.
A ventilator or ventilating cowl according to this invention is made substantially
as follows:-
The top or head may be fitted with four divisions with incline faces each division
communicates with a down tube to carry down the air which impinges upon a
tapered plate; connected to the underside of this plate is a ring or rim to fit
a short length of straight tube upon. This length of tube is supported upon a
smaller tube by side upright strips of metal so as to have an upright passage for
air between the two tubes.
This smaller tube is the top of a tapered tube. Wind blowing against this cowl
enters one of the top divisions and passes down upon the top of upper tapered
plate, and also passes up the length of tube from below and is deflected over the
top by the under side of upper plate thereby setting up a double action.
Within the bottom of the lower tapered tube is a tapered collar over which is
held a double cone. This inner collar is to catch any water that may come down,
a hole being made on the outside to let it run out. Where a cowl of less suction
power is required we dispense with the top four divisions and upper tapered plate
and attach to the top of the short length of straight tube one or more tapered rings
with a suitable crown to prevent down draught.
Dated this 16th day of February 1891.
FREDERIC PRINCE,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Ventilators or Ventilating Cowls.
We, THOMAS OLIPHANT HUNTER HENDRY of 61 Esplanade, Greenock,
Scotland Clerk and JOHN WILKINSON of Imperial Buildings, Ludgate Circus,
London, E.C. Gentleman, 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 refers to an improved construction of ventilators by which a
suction or exhaust of vitiated air is obtained by the movement of the outside
atmospheric air.
To enable our invention to be properly understood we will proceed to describe
the same with aid of the accompanying drawings.

page_text: uptake shaft up which the vitiated air is drawn ; within this shaft near the bottom
is a circular collar C to catch any water should such by any means come down,
which would be deflected into collar C by the cone D, C holes for water to run
out; E a second inlet for the atmospheric air which passing up and out at F,
causing an exhaust in B, which is accelerated by the air entering at A and passing
out at G.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, we declare that what we
claim is.
A ventilator or ventilating cowl consisting of the parts A, B, C, D, E, F, G,
arranged and acting as shown by the accompanying drawings.
Dated this 11th day of November 1891
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, London, W.C., Agent for Applicants.