Improvements in Air Propellers or Fans.
Year: 1893

page_text: Date of Application, 21st Jan., 1893
Complete Specification Left, 20th Oct., 1893-Accepted, 21st Mar., 1894.
PROVISIONAL SPECIFICATION.
Improvements in Air Propellers or Fans.
We, CHARLES MYERS, of Phillips Park Road, Beswick, Manchester, in the
County of Lancaster, Designer, and RICHARD CLARKE, of Henhurst Street,
Queens Road, Manchester, aforesaid, Mechanical Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention is designed to provide fans or air propellers for blowing, exhausting,
or other purposes, which will give an accelerated current of air, or greater degree
of pressure than many of those at present in use.
It consists essentially of the combination with a blowing fan of one of the
ordinary types which delivers a current of air at right angles to the central axis of
the driving shaft, of one, two or more propellers with looped blades placed upon
the same axis and in close conjunction with the blades of the fan, to feed the fan or
assist in delivering air to the centre.
In carrying out the invention in a circular or spiral fan chamber we mount a disc
or spider arms carrying fan blades such as are usually employed in centrifugal
blowing fans, and upon each side of the fan upon the same shaft we place a propeller
with looped blades. These blades are constructed of flat helically disposed loops
both ends of which are attached to the boss thus forming a severed loop composed
of two radial arms connected together by an outer segmental piece by closing an
opening near the centre of the blades.
These blades are preferably cast on a hub or centre which fits upon the shaft, but
they may be made separately of cast or sheet metal, and be bolted or otherwise
attached to a central hub.
Dated this 20th day of January 1893.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Air Propellers or Fans.
We, CHARLES MYERS, of Phillips Park Road, Beswick, Manchester, in the
County of Lancaster, Designer, and RICHARD CLARKE, of Henhurst Street,
Queens Road, Manchester, aforesaid, Mechanical 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 is designed to provide fans or air propellers for blowing, exhausting
or other purposes, which will give an accelerated current of air, gases or other
vapours or greater degree of pressure than many of those at present in use.
It consists essentially of the combination with a blowing fan of one of the
ordinary types which delivers a current of air at right angles to the central axis
of the driving shaft, of one, two or more propellers with looped blades placed upon
the same axis and in close conjunction with the blades of the fan, to feed the fan
or assist in delivering air to the centre.
It will be fully described with reference to the accompanying drawings.
Fig. 1. Side elevation.
W

page_text: Fig. 4. Transverse section.
In a circular or spiral fan chamber A we mount on a shaft B a disc or spider
arms C.carrying fan blades D. such as are usually employed in centrifugal blowing
fans. At each side of the fan and upon the same shaft B we place an air
propeller E which delivers air in the line of the central axis constructed with two,
three or more looped screw blades F. The blades F are constructed of flat or
curved helically disposed loops both ends of which are attached to the boss one in
advance of the other thus forming spiral or twisted blades in the form of a severed
loop composed of two radial arms connected together at their periphery by an
outer segmental piece, the ends of which are helically disposed with reference to
the central opening and angularly arranged relatively to the boss to which they are
attached.
The blades of the air propeller E are constructed as described in the Specification
of Myers Patent No. 23870 of 1892 either by being cast of suitable metal or being
built of sheet metal attached to lugs on a central boss or hub.
By this construction we are able to obtain a blast at a higher pressure than by
either form of apparatus separately.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. An air propeller or blast apparatus constructed of a blowing fan which
delivers a current of air at right angles to the central axis in combination with a
propeller on one or both sides placed on the same axis which delivers the air in the
line of the shaft constructed with spiral or twisted blades in the form of severed
loops the ends of which are attached to the boss in advance one of the other and
are helically disposed relatively to the central opening and angularly arranged
relatively to the boss substantially as described.
2. In apparatus for forcing or propelling air the combination with a fan which
delivers a current of air at right angles to the central axis of an air propeller
constructed as described in Specification of Patent No. 23870 of 1892 which
delivers the air in the line of the central axis to feed the air into the fan substantially
as described and shown.
Dated this 19th day of October 1893.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.