Improvements in Fans or Rotary Blowers.
Year: 1891

page_text: Date of Application, 11th May, 1891
Complete Specification Left, 11th Feb., 1892-Accepted, 12th Mar.. 1892
PROVISIONAL SPECIFICATION.
Improvements in Fans or Rotary Blowers.
We JOSEPH JEFFERSON, LAZARUS JEFFERSON and MORDECAI JEFFERSON,
all of Brown Royd Works, Bradford in the County of York, Machine Makers,
do hereby declare the nature of this invention to be as follows:-
This invention relates to fans or rotary blowers, and consists of an axis or shaft
having two series of vanes or wings, each series being spaced at a distance apart
on the shaft and enclosed by a casing having open ends and a central discharge
orifice preferably parallel to the axis.
According to this my said invention I employ a series of vanes or wings attached
to a boss and secured at an angle to the said boss and to the shaft on which the
boss is fastened a like boss and like vanes or wings but placed at opposite angle to
the wings, on the first mentioned boss; is fastened on the shaft, at a distance away
from the first series, both sets of vanes or wings are covered by a casing the inside
of which is circular but open at both ends and having an orifice for discharge of
air preferably at right angles to the shaft.
The action is that the vanes draw no air from the opposite ends of the casing
and propel it through the outlet orifice and the fan so constructed is almost silent
when working at high speed.
Dated this 8th day of May 1801
WALTER BRIERLEY,
Central Chambers, Halifax, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Fans or Rotary Blowers.
We, JOSEPH JEFFERSON, LAZARUS JEFFERSON, and MORDECAI JEFFERSON
all of Brown Royd Works, Bradford, in the County of York, Machine Makers,
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 relates, to fans or rotary blowers, and consists, of an axis or
shaft, having two series of vanes or wings, each series being spaced, at a distance
apart on the shaft, and enclosed by a casing, having open ends, and a central
discharge orifice, preferably parallel to the axis.
According to this my said invention, I employ a series of vanes or wings,
attached to a boss, and secured at an angle, to the said boss, and to the shaft, on
which the boss is fastened; a like boss, and like vanes or wings, but placed, at
opposite angle to the wings, on the first mentioned boss, is fastened on the shaft,
at a distance away from the first series; both sets of vanes or wings are covered
by a casing, the inside of which is circular, but open at both ends, and having an
orifice for discharge of air, preferably at right angles to the shaft.
The action is, that the vanes, draw air from the opposite ends, of the casing, and
propel it through the outlet orifice, and the fan so constructed is almost silent,
when working at high speed.
Such being the nature, and object of our said invention, the following is a
complete description of same, reference being had, to the accompanying drawings,
in which :-
Fig. 1, is a side elevation, of improved fan or rotary blower, the casing being
shewn in section.

page_text: Fig. 2 is an end view, in section, on line A. B. of Fig. 1.
Fig. 3 is elevation, of one of the vanes or wings, detached, and
Fig. 4, is a plan view of Fig. 3.
Fig. 5 detail enlarged.
Fig. 6 shews the wings or vanes extended in width, so as nearly to join each
other.
At 1 is the casing, and framing, 2 the shaft, 3 the driving pulley, preferably
on sleeve or long collar 31, so as to facilitate bushing and repair of wear, 4 the
vanes or wings, each of which, is by the plate 5, and its lug 6, by revits and
set screw 7, fastened onto, or into the boss 8, and which boss, in turn is
received and made fast, on the shaft 2, and it must be observed, that the vanes
or wings, are all at an angle, to their carrying boss 8, and to the driving
shaft 2; also, that the vanes or wings of one series, are at opposite angles, to
those of the other series, that is to say, one half the vanes or wings, point to the
left, and the other half point to the right, as shewn at Fig. 2. The width of
the vanes, may be increased, so as nearly to join, or touch each other, as shewn
at Fig. 5. The casing of the fan, is open ended, and the air discharge orifice,
is preferably at right angles, to the shaft.
Having now particularly described, and ascertained, the nature, and object of
my invention, and in what manner, the same is to be performed, I declare that
what I claim is :-
1. The improved fan or blower, wherein is comprised, two series of vanes or
wings, at opposite angles, and an open ended casing, as herein fully described,
and illustrated, by the annexed drawings.
2. The application as, and employment of, two series of vanes or wings, to fans,
or rotary blowers, as herein set forth.
Dated this on day or
JOSEPH JEFFERSON.
LAZARUS JEFFERSON.
MORDECAI JEFFERSON.
By their Agent,
Walter Brierley,
Bank Chambers, Waterhouse Street, Halifax.