Improvements in the Ventilation of Mines.
Year: 1889

page_text: Date of Application, 7th Oct., 1889
Complete Specification Left, 15th May, 1890-Accepted, 5th July, 1890
.
PROVISIONAL SPECIFICATION.
Improvements in the Ventilation of Mines.
WILLIAM ANDREWS Electrician 116 St. Anns Crescent Hungerhill Road Nottingham
lo hereby declare the nature of this invention to be as follows:-
:-
Improved method of ventilating coal and other mines, and saving life in mines.
By forcing pure air down a pipe of suitable size and properly distributed, where
equired and a duplicate pipe of a suitable size, for delivering to the surface, all gasses
hat may accumulate. So that all gasses, thus brought to the surface, can be used for
lomestic or other purposes if necessary.
COMPLETE SPECIFICATION.
Improvements in the Ventilation of Mines.
1, WILLIAM ANDREWS, of 116, St. Anns Crescent, Hungerhill Road, Nottingham,
in the County of Nottingham, Electrician, do hereby declare the nature of this inven-
tion 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 the Ventilation of Coal and other mines, and it consists
essentially in providing a pipe extending from the surface of the ground to the bottom
of the shaft, and thence by means of branches to the various headings of a mine
where gas is liable to accumulate so that any gas which accumulates in any of the
said headings may be immediately drawn to the surface.
To enable my invention to be fully understood I will describe the same with reference
to the accompanying drawing, in which
Figure 1 represents in section a portion of a coal mine provided with means for
ventilating the same according to my invention.
Figure 2 is a sectional view of a detail.
a indicates a shaft of the mine, and one of the headings. c is the pipe which extends
from the surface of the ground into the headings, for instance, as shown into the
heading, near the roof of which it terminates. The upper end of this pipe at
the surface of the ground is connected with a centrifugal or other pump or exhauster,
as shown at d, which pump or exhauster when in motion serves to draw the impure
air or gas from the mine. The other end e of this pipe in the heading is preferably
provided with a screw-threaded nozzle, so that it may be closed by means of a cap
or have a hose connected thereto, the free end of which may be moved from place to
place to withdraw the gas from any high parts of the roof.
In some cases I find it advantageous to provide the nozzle with a rose having a
porous plate to filter the gas passing through the said rose. A rose suitable for my purpose
is indicated by the letter f in Figure 2. g is the nozzle attached to the pipe c and h. is
a porous diaphragm of carbon or other suitable material which is clamped between
the rose and the nozzle packing rings, ii being employed in order to ensure a tight
joint around the said diaphragm.
The place of the air which is withdrawn from the mine is supplied by the pure air
forced down the shaft in the ordinary manner; or, if desired, I may arrange a second
pipe beside the pipe b, so that fresh air will be supplied from the surface directly
adjacent to the point from which the gas is being withdrawn.
In cases where large quantities of gas are known to exist I sometimes provide for
storing the same for lighting or heating purposes, in such cases the discharge side
of the exhauster is connected with a gas-holder, for instance as shown at k.

page_text: 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.) The method of ventilating a mine consisting in the arrangement of pipes
extending from a pump or exhauster to the various headings from which gas is to be
withdrawn substantially in the manner described.
(2.) The combination with an exhaust pipe arranged as described, of a second pipe
through which fresh air may be conveyed directly to the point from which gas or
impure air is being exhausted, as set forth.
Dated the 15th
1000 ..זר.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.