A Combined Ventilating Fan and Motor.
Year: 1894

page_text: Date of Application, 6th Sept., 1894-Accepted, 6th Oct., 1894
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A Combined Ventilating Fan and Motor.
I, FRIEDRICH EISENBEIS, of No. 1 Enkstrasse, Wellesweiler, in the Empire
of Germany, Master Locksmith, 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:-
My invention relates to a combined ventilating fan and motor especially
applicable for ventilating mines or pits and has for its object the introduction of
fresh air into the mine and withdrawing simultaneously therewith the noxious
gases or foul air therefrom.
I attain this end in the manner shown by the accompanying drawing, in
which :-
==
Figure is a view in side elevation-partly in section-of my combined
ventilating fan and motor.
Figure 2 is a view in front elevation-partly in section-thereof, and
Figures 3 and 4 are views in front elevation of the valve faces of the said
motor.
Throughout the views similar parts are marked with like letters of reference.
A designates the fan casing with an opening A¹ to which is connected the pipe
for the air that is to be withdrawn from the mine, and A2 is the central opening or
outlet for the said air. a is the driving shaft on which the vanes b, b, of the fan
are mounted. The said driving shaft being mounted in one or more bearings
carried by the frame D. On one side of this frame is mounted a motor B, in
such a manner as to communicate motion to the shaft a through a crank a'. On
the said shaft a is keyed the flywheel C. On the frame D is formed a valve
face d, having ports i and i¹ formed therein, one of the said ports i being in
communication with a supply of compressed air through a pipe k, and the other
port is in communication with the mine for supplying fresh air thereto.
Engaging with this valve face d is the valve face e, of the oscillating cylinder B¹,
having a port h therein adapted to coincide with either the port i or the port .
The valve faces being kept in contact with each other by means of a bolt f and
spring y, the said bolt f being screwed into the valve face e of the cylinder B¹ and
passing freely through a hole in the valve face d of the frame D, thus allowing
the cylinder B' to oscillate.
The operation of the combined fan and motor is as follows:- -When the piston
of the oscillating cylinder 13' is at the bottom of its stroke, compressed air enters
the cylinder beneath the piston through the port i which is then co-incident with
the port and so drives the piston upwards, causing the shaft a to rotate and so
driving the fan. On the continued ascent of the piston, the cylinder which
oscillates about the axis of the bolt, is rotated to such an extent that when the
piston has reached the top of its stroke, or its highest position, the port / has
moved away from the port i, and moves in front of the port i when the piston is
moving down, so that the compressed air contained in the cylinder can escape into
the mine, and thus provides a sufficient amount of fresh air.
In place of the motor above described, any other known construction of
compressed air engine or motor may be employed, either single or double acting.
The fan shaft may in some cases be independent of the motor shaft, the two shafts
being then coupled together by any suitable form of gearing.
I wish it to be particularly understood that I do not limit myself to the precise
details of construction herein before described and illustrated by the accompanying
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page_text: drawings, but that I hold myself at liberty to make such changes and alterations
as fairly fall within the spirit and scope of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
(1.) A combined ventilating fan and motor as hereinbefore described and shown
with reference to the accompanying drawings.
(2.) A fan for ventilating mines or pits in combination with a compressed air
motor such as B adapted to rotate the said ventilating fan so as to cause the
noxious or foul air to be withdrawn and at the same time force in fresh air,
substantially as described and shown.
Dated this 6th day of September 1894.
ROBERT E. PHILLIPS, M.I.M.E.,
.
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.