Year: 1888

page_text: Date of Application, 15th Feb., 1888
Complete Specification Left, 14th Nov., 1888
Complete Specification Accepted, 21st Dec., 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:-
Schiole" fans and especially to
This invention relates to that class of fans called "
those of large dimensions, the object of the invention being to reduce the noise and
vibration to a minimum.
In making "Schiele" fans of small or moderate dimensions wherein it is practicable
to make the casing of cast iron, it has been the practise to make the volute shaped air
chamber outside the periphery of the fan of a semi-circular form in section or nearly
so, and to make the discharge tube of a similar form but of course, of larger diameter,
and hence, the line of junction of the two tubes cutting each other at an acute angle
where the volute commences forms as it were a gullet of an arched or semi-elliptical
form, whereas in "Schiele" fans of large dimensions it has been the practise to make
both the casing and the discharge flue or chimney of a rectangular form in section
either of brickwork or plate iron or partly of one and partly of the other.
In either case the line of junction of the two tubes would be a straight line parallel
with the tips of the vanes, and it has been found in practise that fans thus formed
caused a much greater amount of vibration and noise in consequence of the rapid
movement of the tips of the vanes past this fixed parallel barrier.
According to our Invention we propose to remedy this defect in large "Schiele"
fans in the following manner.
Instead of making the whole of the volute air chamber outside the vanes of a
rectangular section we propose to make it commence at the junction with the inner
side of the discharge flue or chimney of a semi-circular section (or nearly so) and
then to gradually work it from this form into a rectangular shape before its junction
with the outer side of the discharge flue or chimney (which latter we also make
rectangular) by which means we obtain the arched or elliptical gullet or line of

page_text: junction above mentioned, and thus by getting rid of the usual straight line of junction
at this point we reduce both the noise and vibration to a minimum and obtain a much
more effective action upon the air..
In some cases we prefer to reverse this arrangement by making the discharge flue
or chimney and the principal part of the volute air chamber of a circular section
and to gradually bring the volute chamber to a rectangular section as it approaches the
inner side or wall of the discharge flue or chimney.
This will produce precisely the same effect of reducing the line of junction or gullet
to the arch or elliptical form.
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicants.

page_text: An Improvement in Fans for Exhausting and Propelling Air.
We JOHN CRIGHTON and 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 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 that class of fans called "Schiele" fans and especially to
those of large dimensions the object of the invention being to reduce the noise and
vibration to a minimum.
In making "Schiele" fans of small or moderate dimensions wherein it is practicable
to make the casing of cast iron it has been the practise to make the voluto shaped air
chamber outside the periphery of the fan of a semi-circular form in section or nearly
so, and to make the discharge tube of a similar form, but, of course, of larger
diameter, and hence the line of junction of the two tubes cutting each other at an acute
angle where the volute commences forms as it were a gullet of an arched or semi-
elliptical form whereas in Schiele fans of large dimensions it has been the practise to
make both the casing and the discharge flue or chimney of a rectangular form in
section either of brickwork or plate iron or partly of one and partly of the other.
In either case the line of junction of the two tubes would be a straight line parallel
with the tips of the vanes, and it has been found in practise that fans thus formed
caused a much greater amount of vibration and noise in consequence of the rapid
movement of the tips of the vanes past this fixed parallel barrier.
According to our Invention we propose to remedy this defect in large "Schiele
fans by constructing the air chamber in the manner hereinafter described and
illustrated by the drawing annexed in which Fig. 1. is an elevation of our improved
"Schiele" fan casing, and Fig. 2 is a vertical section taken through the line A-B.
in Fig. 1. the casing being shown as constructed of sheet iron.
Instead of making the whole of the volute air chamber a outside the vanes of a
rectangular section we propose to make it commence at its junction with the discharge
flue or chimney b of a semi-circular section or nearly so (see a¹ Fig. 2) and then to
gradually work it from this form into a rectangular shape (see all Fig. 2) before its
junction with the outer side of the discharge flue or chimney (which latter we also
make rectangular) by which means we obtain the arched or elliptical gullet or line of
junction above mentioned (see all Fig. 2) and thus by getting rid of the usual
straight line of junction at this point we reduce both the noise and vibration to a
minimum and obtain a much more effective action upon the air.
The reduction of the semi-circular or curved section of the volute air chamber into
the rectangular form may be more or less gradual, that is to say, the perfect
rectangular portion may commence at the point c Fig. 1. (as represented on the
drawings) or it may became rectangular in section at the commencement of any of the
sections d, e, for even at g as may be preferred, the requisite increasing area to accom-
modate the increasing volume of air being always maintained.

page_text: In some cases we prefer to reverse this arrangement by making the discharge flue
or chimney and the principal part of the volute air chamber of a circular section and
to gradually bring the volute chamber to a rectangular section as it approaches the
inner side or wall of the discharge flue or chimney. This will produce precisely the
same effect of reducing the line of junction or gullet to the arch or elliptical form.
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 :-
:-
The improvement in the casing of "Schielo" fans consisting in the gradual reduc-
tion of the sectional form of the volute air chamber from a semicircular or similar
shape to a rectangular form (or vice versa) whereby the line of junction between the
commencement of the said chamber and the discharge tube or chimney, where the one
cuts the other (instead of being a straight line) is of an arched or elliptical form
substantially in the manner and for the purpose hereinbefore set forth and illustrated
by the drawings annexed.
Dated this 13th day of November 1900
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicants.