A Screw Ventilator.
Year: 1892

page_text: Date of Application, 6th Jan., 1892
Complete Specification Left, 6th Oct., 1892-Accepted, 12th Nov., 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by EUGEN BÜSCHGENS, of Rheydt, in the Empire of
Germany.]
A Screw Ventilator.
I, William Humphrey WheatLEY of 40 Chancery Lane, London, Consulting
Engineer and Patent Agent do hereby declare the nature of this invention to be as
follows:-
Every rotary movement of a ventilator causes centrifugal motion of the
contiguous air and in such a manner, that a compression of the air results at the
sides of the encasement of the blades or vanes whereas a vacuum is to be observed
at the prolonged part of the axle.
This invention for a screw ventilator consists in curving the blades or vanes to
form parts of a hollow cylinder in such a manner that the centrifugal effect of the
The result is
rotation is forcibly counteracted by the same towards the centre.
that a ventilator with blades or vanes of the form described causes on the draught
side a drawing effect at all points, whereas, on the side where the air streams out a
compact column of air is expelled.
Dated this 6th day of January 1892.
WHEATLEY & MACKENZIE,
40, Chancery Lane, W.C., Agents.
COMPLETE SPECIFICATION.
A Screw Ventilator.
I, WILLIAM HUMPHREY WHEATLEY, of 40 Chancery Lane, London, Consulting
Engineer and Patent Agent, 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 :-
. Every rotary movement of a ventilator causes centrifugal motion of the
contiguous air and in such a manner that a compression of the air results at the
sides of the encasement of the blades or vanes whereas a vacuum is to be observed
at the prolonged part of the axle.
This invention for a screw ventilator consists in curving the blades or vanes to
form parts of a hollow cylinder in such a manner that the centrifugal effect of the
rotation is forcibly counteracted by the same towards the centre. The result is
that a ventilator with blades or vanes of the form described causes on the draught
side a drawing effect at all points, whereas, on the side where the air streams out a
compact column of air is expelled.
In the accompanying sheet of illustrative drawings
Fig. 1 represents in perspective a screw ventilator constructed according to this
invention and Fig. 2 is a side elevation of the rotary centre or vane arms for the
same.
The vanes a are secured to a boss
mounted on a shaft c running on bearings d
in the frame e and driven by a belt through the pulley f. The vanes a are curved
as clearly shown, so that when rotated in the direction indicated by the arrow the
centrifucal effect on the air is counteracted.

page_text: Having now 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 :-
.1. A screw ventilator having rotary curved arms
described and for the purpose set forth.
or vanes substantially as
2. The general arrangement and construction of a screw ventilator with curved
vanes substantially as described with reference to the drawings.
Dated this 6th day of October 1892.
WHEATLEY & MACKENZIE,
40, Chancery Lane, W.C., Agents.