Year: 1887

page_text: Date of Application, 25th May, 1887
Complete Left, 14th Jan., 1888
Complete Accepted, 17th Feb., 1888
We, JOHN CRIGHTON, ROBERT CRIGHTON, and GEORGE CHAPMAN PEEL all of the
Union Engineering Company (C. Schiele & Co.) of Manchester in the County of
Lancaster Engineers do hereby declare the nature of this invention to be as
follows:
This invention relates to the construction of revolving air propellers used for
ventilating purposes the objects of the invention being to put a very large amount of
air into rapid motion and to decrease the friction of the current of air upon the inner
surface of the conducting tube so as to obtain a given result with a minimum of
power.
For this purpose we construct the vanes of the propeller in a hollow curved scoop-
like form somewhat like the bowl of a spoon, the curve preferred being that known as
the "Schiele " curve invented by Christian Schiele in 1848, and since that time
applied by him and patented for various purposes including fans.
Instead however of driving the fan with the convex side of the vanes forward (as
in the "Schiele" fan) we drive the air propeller with the concave side of the vanes
forwards, by which means, instead of acting centrifugally as in an exhaust fan the
vanes scoop the air towards the centre and drive it forwards rapidly along the central
portion of the tube, and thus the friction of the column or current of air against the
inner circumference of the conducting tube is reduced to a minimum.
Datad this 94th day of Mar. 1007
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicant.

page_text: We JOHN CRIGHTON, ROBERT CRIGHTON, and GEORGE CHAPMAN PEEL, all of the
Union Engineering Company (C. Schiele & Co.) Manchester in the County of Lan-
caster Engineers 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 the construction of revolving air propellers used for
ventilating purposes, the objects of the invention being to put a very large amount of
air into rapid motion and to decrease the friction of the current of air upon the inner
surface of the conducting tube so as to obtain a given rosult with a minimum of
power.
The nature of our invention and the manner in which the same is to be performed
or carried into practical effect will be readily understood on reference to the annexed
sheet of drawings and the following explanation thereof.
Fig. 1. is an elevation of the "intake" side of an air propeller constructed
according to our invention, and Fig. 2 is a vertical section of the same taken through
about the line A.-A, on Fig 1. Fig. 3. is a face view of one of the vanes drawn to
a larger scale. Fig. 4, is a plan view of the tip of the vane. Fig. 5. a vertical
section through about the line B,-B in Fig. 4 and Fig. 6 is a horizontal section
through about the line C-C thereon. a, a the casing of the fan b, b the arms,
c, c the wings, or vanes and d, d the revolving axle or shaft.
دو
For the purposes of our invention we construct the vanes c, c of the propeller in a
hollow curved scoop-like form somewhat like the bowl of a spoon, the curve preferred
being that known as the "Schiele curve invented by Christian Schiele in 1848 and
since that time applied by him and patented for various purposes including fans, but
the curve may be a portion of a circle (as at Figs. 4. 5. 6) or any other suitable
curve. Instead however of driving the fan with the convex side of the vanes
forward (as in the "Schiele" fan) we drive the air propeller with the concave side of the
vanes c, c forwards as shown by the arrows on Figs. 1 and 5 by which means, instead
of acting centrifugally as in an exhaust fan the vanes scoop the air towards the centre
and drive it forwards rapidly along the central portion of the tube, and thus the
friction of the column or current of air against the inner circumference of the
conducting tube is reduced to a minimum.
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 :-
1
An air propeller having the wings or vanes made of a hollow curved or scoop-like
form and driven with the concave side foremost substantially as and for the purposes
hereinbefore particularly set forth and described and illustrated by the drawings
annexed.
D
L
101 1
Ր
1000
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicants.