Improvements in Fans or Blowing Apparatus.
Year: 1892

page_text: Date of Application, 13th Feb., 1892
Complete Specification Left, 14th Nov., 1892-Accepted, 7th Jan., 1893
PROVISIONAL SPECIFICATION.
[Communicated from abroad by PAUL MORTIER, of 31, Rue de l'Hôtel-de-Ville,
Lyon, in the Republic of France, Electrical Engineer.]
Improvements in Fans or Blowing Apparatus.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, do hereby declare
the nature of this invention to be as follows:-
This invention relates to a fan or blowing apparatus which comprises a paddle
wheel adapted to turn in a cylindrical casing the sides of which are provided with
openings for the passage of the rotary shaft.
The air enters the casing, not through lateral apertures in the direction of the
shaft, as is the case with the fans or blowing apparatus heretofore employed, but
through a wide portion of the periphery. It is caught by the forwardly curved
vanes of the said paddle wheel and caused to traverse the casing diametrically at
a high velocity. Then it again encounters the rotary crown of vanes of the
paddle wheel which forces it with a still greater velocity into a bell-mouthed
channel where the energy is spent, and causes an equivalent increase of pressure.
The principle underlying the improved apparatus consists in the multiplication
of the initial velocity by the double passage through the crown of vanes of the
paddle wheel, and in the recovery of this increased velocity in a divergent.
diffuser.
For augmenting the capacity of this fan or blowing apparatus the diametric
current may be guided by two fixed cores.
Two or more paddle wheels may be arranged side by side upon the same shaft
for augmenting the volume, or one behind the other for augmenting the pressure.
Dated this 13th day of February 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Fans or Blowing Apparatus.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, 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 blowing apparatus.
In the accompanying drawing I have shown how my said invention may be
conveniently and advantageously carried into practice.
The apparatus constructed according to the present invention comprises a wheel
or disc & the curved vanes E F of which are arranged symmetrically around the
periphery of the central disc and on both sides of the latter, the said disc G being
keyed upon the driving shaft V of the apparatus.
The said invention also comprises a casing H in which the above-mentioned
wheel or disc turns, the two flat sides of the casing being provided with apertures
for the passage of the shaft V. This casing, made in the form represented in the
drawing, has an inlet orifice J K and an outlet orifice M N. Two fixed cores or
projecting pieces OP are provided which are formed integral with the sides of the
casing and extend within the central part of the crown of vanes of the wheel so

page_text: as to nearly touch the central disc G. These cores or projecting pieces OP
which are intended to augment the capacity of the apparatus and are fixed in the
space between the vanes, while the wheel turns, have for their object to guide the
stream of air passing through the wheel and to prevent it from being driven in
the opposite direction which might be caused by that portion of the wheel situated
on the left, thus leaving only the useful propelling action to be effected by the paṛt.
of the wheel situated on the right.
The operation of the apparatus is as follows:-The air enters the casing, not
through openings in the axis, as in the case of other fans, but through a wide
portion of the periphery. The air is then caught by the vanes which are curved
forward in the direction of the movement, and is forced through the casing
diametrically at a great velocity. It then again encounters the rotary crown of
vanes which drives it at a still greater velocity into the widened channel M N
where the live force is destroyed by causing a proportionate increase of pressure.
Accordingly the principle of the apparatus is the increase of the initial velocity
by reason of the double passage through the crown of vanes and the recovery of
this velocity thus increased in a divergent diffuser.
Two or more wheels may be coupled laterally and upon the same axis for
augmenting the delivery and one after the other for augmenting the pressure.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondent, I declare that what I claim is :-
The improved fan or blowing apparatus constructed and arranged substantially
as hereinbefore described with reference to the drawing.
Dated this 14th day of Navamhoz 1900
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.