Improvements in, or connected with, the Construction of Fans or Air Propellers.
Year: 1897

page_text: Date of Application, 20th Mar., 1897
Complete Specification Left, 20th Dec., 1897-Accepted, 5th Feb.,
1898
PROVISIONAL SPECIFICATION.
Improvements in, or connected with, the Construction of Fans or
Air Propellers.
We, JAMES HENRY PICKUP, Engineer, of Studley Terrace, Bury, in the County
of Lancaster, THOMAS HENRY ASHWORTH, Engineer, of 88, Manchester Road,
Bury, aforesaid, RICHARD MCCLELLAN, Electrician, of 167, Rochdale Road,
Bury, aforesaid, and OSWALD PICKUP, Engineer, of Studley Terrace, Bury, afore-
said, do hereby declare the nature of this invention to be as follows:-
-
This invention has for its object to provide a simple and efficient means for con-
necting the blades of fans or air propellers to their shaft.
According to this invention the connection is effected by two bosses which may
be constructed of sheet metal for the sake of lightness or be made solid as pre-
ferred. Each boss consists of a central portion or collar through which the shaft
passes and projecting from this are portions set at an angle corresponding to the
angle at which the inner ends of the blades are to be fixed the number of such
portions on each boss corresponding with the number of blades in the fan or pro-
peller. The two bosses are secured to the shaft with the inclined surfaces on the
one boss facing those on the other and the roots or inner ends of the several blades
are secured thereto each such root or inner end being secured to an
inclined surface on cach of the bosses so that the root OT inner end
crosses the axial line of the shaft diagonally and is tangential to a circle out-
ward of, and concentric with, the said shaft. The securing of the blades to the
bosses can be effected by any suitable means but preferably by screws or other
fastenings which can be readily removed to allow of the blades being detached
and replaced as required.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
Improvements in, or connected with, the Construction of Fans or
Air Propellers.
We, JAMES HENRY PICKUP, Engineer, of Studley Terrace, Bury, in the County
of Lancaster, THOMAS HENRY ASHWORTH, Engineer, of 88, Manchester Road,
Bury, aforesaid, RICHARD MCCLELLAN, Electrician, of 167, Rochdale Road,
Bury, aforesaid, and OSWALD PICKUP, Engineer, of Studley Terrace, Bury, afore-
said, do hereby declare the nature of this invention and in what manner the same
[Price 8d.1

page_text: is to be performed to be particularly described and ascertained in and by the
following statement:-
-
This invention has for its object to provide a simple and efficient means for con-
necting the blades of fans or air propellers to their shaft.
We will describe the invention with reference to the accompanying drawing
which represents in Figure 1 a part of a fan or air propeller shaft provided with
means for attaching the blades according to this invention. Figures 2 and 3
represent in views at right angles to each other one of the bosses constituting the
means of attachment of the blades to the shaft.
According to this invention the connection is effected by two bosses AA which
may be constructed of sheet metal for the sake of lightness or be made solid as
preferred. Each boss consists of a central portion or collar a through which the
shaft B passes and projecting from this are portions a² a² each set at an angle
corresponding to the angle at which the inner ends of the blades are to be fixed
the number of such portions on each boss corresponding with the number of blades
in the fan or propeller. The two bosses A are secured to the shaft B with the
inclined surfaces a² on the one boss A facing those on the other boss A and the roots
or inner ends of the several blades are secured thereto each such root or inner end
being secured to an inclined surface on each of the bosses so that the root or inner
end crosses the axial line of the shaft diagonally and is tangential to a circle out-
ward of, and concentric with, the said shaft. The dotted lines indicate the root
lines of the blades so secured. The securing of the blades to the bosses can be
effected by any suitable means but preferably by screws, or other fastenings, which
can be readily removed to allow of the blades being detached and replaced as
required.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
For connecting the blades of fans or air propellers to their shafts bosses secured
to the shaft and formed with angular faces to which the inner parts or roots of
the blades are connected substantially as hereinbefore described.
00h 1 of Dabo 1907
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.