An Improvement in Air Fans.
Year: 1888

page_text: Date of Application, 25th Aug., 1888
Complete Specification Left, 23rd May, 1889-Accepted, 27th July, 1889
PROVISIONAL SPECIFICATION.
An Improvement in Air Fans.
HENRY THOMAS JOHNSON and THOMAS SILK WILSON, Surveyors, St. Andrews
Chambers Albert Square Manchester. do hereby declare the nature of this invention
to be as follows:-
Our Invention consists of a Fan as represented by Fig. 1 plan fig. 2 sectional
elevation and fig. 3 section of a wing B. The Fan and working parts thereof may be
of any dimensions, and is of such form as to have a large gathering mouth to each
wing forming about a segment of a circle. The Fan itself comprising the four
wings B being in form a semi globe. The gathering or Intake mouths of the wings
are represented by A. The wings B form scoops to gather the air as represented by
section fig. 3 and in elevation would represent a quarter cone or nearly so. The air as
gathered at openings A into the wings B will be ejected at H, C represents the axle
on which is fixed the pulley F working in bearings G & G attached to the arms E
the latter being fixed to the frame J. The wings are of thin sheet metal fixed both
to the axle and to the rim D.
We claim that by the semi globe form we obtain the best form and larger mouth
for gathering and ejecting air.
Dated this 24th day of Angust 1888
HENRY THOMAS JOHNSON.
THOMAS SILK WILSON.
COMPLETE SPECIFICATION.
An Improvement in Air Fans.
HENRY THOMAS JOHNSON and THOMAS SILK WILSON, both of Albert Square
Manchester, Surveyors 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 :-
Our Invention consists of a Fan as represented in Drawing accompanying
Provisional specification Fig. 1 being plan Fig. 2 elevation and Fig. 3 section of
wings or blades.
The fan is of such form as to have a large gathering mouth A to each wing, each
mouth A being a segment of a circle or thereabouts, for the outer circumference
may be a little flattened and so make the form rather elliptical.
The fan itself comprising the four or if required more wings B forming a semi
globe, or thereabouts.
The gathering or intake mouths are represented by A. The wings or blades B
form scoops to hold the air as represented by part section Fig. 3 and in elevation.
B would be in form somewhat of a quarter cone, the back of each wing or blade
having the straight Cone line B¹ and the front of the wing or blade a curved or
circular line, B.
The air from the wings will be ejected at H. C represents the axle on which is fixed
the pulley F working in bearings G G on the framework Ef and J.
-The wings are fixed both to the axle C and to the rim D. the precise form is more
particularly shewn by a. b. c. d. e. fig. 3 representing sections at different points a. b.
de on elevation fir 2

page_text: Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed, we declare that what
we claim is.
Firstly that by the semi globe form of Fan we obtain a larger mouth for gathering
air into each wing, than could consistently be obtained from a flatter or less circumi-
scribed form of Fan.
Secondly as each wing or blade is formed as a scoop by being enclosed from the
mouth A to the spindle it can the better retain the air gathered in for ejecting at
the outlet H, and is more particularly represented by A in Fig. 2 as shewing the
mouth and by Fig. 3 as shewing in section the scoop form of the wing or blade.
Toted thie 22nd day of May 1889
HENRY THOMAS JOHNSON.
T. SILK WILSON.