Improvements in Apparatus for the Ventilation of Mines.
Year: 1884

page_text: Improvements in Apparatus for the Ventilation of Mines.
I, WILLIAM TEAGUE Junior, of Carn Brea, in the county of Cornwall, Mining
Engineer, do hereby declare the nature of my invention for "IMPROVEMENTS IN
APPARATUS FOR THE VENTILATION OF MINES" to be as follows:-,
My said invention consists essentially of the following arrangement-A pipe of
sufficient size to remove the foul air and to supply fresh air is placed in the shaft
or heading of the mine and is led to the particular part which it is desired to
ventilate.
"
Another pipe containing compressed air or steam supplied from any convenient
source is connected with the aforesaid ventilating pipe by means of two short
pipes, such said short pipes being each supplied with a stop cock or valve-The
said pipes enter the ventilating pipe and terminate in nozzles pointing lengthways
down the said pipe, but in opposite directions-The said nozzles are preferably
composed of a number of small holes arranged in a circle, with a cone in the
centre thereof, the said holes being themselves of a conical or V form, by
which arrangement the effect of the jets issuing from the said holes is greatly
augmented.
The action of the apparatus is as follows:-.
In order to remove the noxious gases and fumes generated by blasting, one of
the stop cocks is opened to admit compressed air or steam to the nozzle which
points away from the end of the ventilating pipe which is situated at the place
where the blasting is being carried on-A partial vacuum will be created in the
said pipe and the noxious gases and fumes will be drawn into it and expelled at the
other end thereof.
As soon as the said gases have been removed, the stop cock is closed and
the other stop cock opened, when a supply of fresh air will be drawn in at the
outer end of the ventilating pipe and delivered at the point from which the foul
gases have been removed.
The ventilating pipe is thus double acting, or made to serve a two fold purpose,
and by its means cold pure air is delivered around the workmen who are fixing the
machine for resuming drilling operations after blasting, and much time is thereby
saved.
The principal feature of my invention is the economy of extracting the foul air
and supplying fresh air through the same ventilating pipe by the adjustment of
stop cocks or valves as herein set forth.

page_text: -
Improvements in Apparatus for the Ventilation of Mines.
I, WILLIAM TEAGUE Junior of Carn Brea, in the county of Cornwall, Mining
Engineer 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 said invention consists essentially of the following arrangement. A pipe of
sufficient size to remove the foul air and to supply fresh air is placed in the
shaft or heading of the mine and is led to the particular part, which it is desired to
ventilate.
Another pipe containing compressed air or steam, supplied, from any convenient
source, is connected with the aforesaid ventilating pipe by means of two short
pipes, such said short pipes being each supplied with a stop-cock or valve. The
said pipes enter the ventilating pipe and terminate in nozzles pointing lengthways
down the said pipe, but in opposite directions. The said nozzles are preferably
composed of a number of small holes arranged in a circle, with a cone in the
centre thereof, the said holes being themselves of a conical or V form, by
which arrangement the effect of the jets issuing from the said holes is greatly
augmented.
The action of the apparatus is as follows:-In order to remove the noxious gases
and fumes generated by blasting, one of the stop-cocks is opened to admit
compressed air or steam to the nozzle, which points away from the end of the
ventilating pipe which is situated at the place where the blasting is being carried
on. A partial vacuum will be created in the said pipe and the noxious gases and
fumes will be drawn into it and expelled at the other end thereof. As soon as the
said gases have been removed, the stop-cock is closed and the other stop-cock
opened, when a supply of fresh air will be drawn in at the outer end of the
ventilating pipe and delivered at the point from which the foul gases have been
removed. The ventilating pipe is thus double acting, or made to serve a two-fold
purpose, and by its means cold pure air is delivered around the workmen who are
fixing the machine for resuming drilling operations after blasting, and much time
is thereby saved. The principal feature of my invention is the economy effected
by extracting the foul air and supplying fresh air through the same ventilating,
pipe by the use of stop-cocks or valves as herein set forth.
.
In order that my invention may be clearly understood, I will now proceed to
further and more particularly describe the same by reference to the accompanying
sheet of drawings, in which Fig. 1 is a longitudinal section of the, ventilating pipe
with the nozzles and pipes for supplying the compressed air or steam. Fig. 2 is an
end elevation of a nozzle to an enlarged scale and Fig. 3 is a section through the
centre of such nozzle.
A A¹ is the double acting ventilating pipe of any required length, fixed in the
mine, the end A¹ terminates at the place required to be ventilated; B is the pipe
supplying the compressed air or steam.
Two branch pipes C and D are led from the pipe B into the pipe A A', their
ends are bent at right angles and point in opposite directions from one another

page_text: down the centre of the said pipe, such ends being fitted with nozzles E and F, stop-
cocks H.and I are fitted in the pipes C and D. The construction of the nozzles is
shewn clearly in the enlarged views in Figs. 2 and 3.
They consist of a cap provided with a female screw, to screw on the end
of the pipe.
The end of the cap is perforated with a number of small holes K, arranged in a
circle, while a cone L occupies the centre of the circle, and the holes themselves
are of a conical or V form as clearly shewn.
Such peculiar construction of the nozzle is found to greatly augment the effect of
the jets issuing therefrom.
When a blast has been fired near the end A¹ of the ventilating pipe, the stop-
cock H is opened and the jets of air or steam rushing in the direction A create a
partial vacuum in the ventilating pipe and thus rapidly draw off the foul gases in
the neighbourhood of the end A', the said gases being expelled at the end A. As
soon as all the gases have been removed the stop-cock H is closed and the stop cock
I opened, fresh cool air will then be drawn in at A and delivered at A¹
By means of my invention'a single pipe serves the double purpose of extracting
foul air and immediately afterwards of delivering fresh air at the same place. It
can be made to work at any distance according to the pressure of air or steam used
in the jets.
The noxious gases are carried away in a pipe over the heads of the men at work,
and the men are able very rapidly to resume work at the spot where the blast was
fired, as the foul air is quickly removed and the atmosphere is then rendered pure
and cool by the fresh air delivered round and about the men while at work.
The apparatus is economical in first cost and easy to fix, and it also effects a great
saving of time as above explained.
I do not necessarily confine myself to the use of jets of compressed air or steam.
as my invention may be used in combination with my improved double-acting
ventilating fan; but having now particularly described and, ascertained the nature
of my said invention and in what manner the same is to be performed, I declare
that what I claim, is
1. The improved apparatus for the ventilatin of mines constructed, substantially
as herein shewn and described.
2.-A ventilating pipe A A¹ in combination with two stop cocks H and I so that,
the said pipe can serve the double purpose of exhausting and delivering, sub-
stantially as lierein shewn and described.
3.-The construction of nozzles shewn in Figs. 2 and 3 of the accompanying
drawings, substantially as herein shewn and described.
4. The combination of a ventilating pipe A A¹ with nozzles of the construction
shewn in Figs. 2 and 3 of the accompanying drawings, substantially as herein
shewn and described.
5.The combination of a ventilating pipe A A¹ with pipes C and D fitted with
stop cocks H and I and nozzles of the construction shewn in Figs. 2 and 3 of the
accompanying drawings, substantially as herein shewn and described.
Dated this 22nd day of September 1885.
AMBROSE MYALL, C.E.,
Agent for the Applicant.