Improvements in or relating to Air-compressers for use in Raising Liquids in Mines, Quarries, and the like.
Year: 1893

page_text: Date of Application, 16th Jan., 1893
Complete Specification Left, 14th Oct.. 1893-Accepted, 18th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in or relating to Air-compressers for use in Raising
Liquids in Mines, Quarries, and the like.
We, EVAN EVANS, Plumber, Llanrwst, Caernarvonshire, WILLIAM VEITCH,
Managing Director North Wales Sulphur Mining Co. Trefriw, Caernarvonshire,
and GEORGE VEITCH, Chemical Engineer, Crieff, Perthshire, do hereby declare
the nature of this invention to be as follows :-
This invention has for its object mainly to effect great saving in power in
operating air compressers used in connection with mines, quarries and the like for
raising water or other liquids by air pressure, and it consists in utilizing the
exhaust air from the water or liquid raising plant by returning it to the air
compresser.
The invention is particularly applicable in conjunction with liquid raising
apparatus of the class in which the liquid to be raised is forced by air under
pressure led from an air compresser through pipes to a series of forcing chambers
the exhaust compressed air from the apparatus, instead of being discharged into
the atmosphere, being under the present invention led by piping from the automatic
forcing chambers direct to the air inlets of the air compressing cylinder or
cylinders at a pressure considerably in excess of that of the atmosphere.
The exhaust compressed air thus in part actuates the piston of the air com-
pression cylinder as a motor and the power required for compressing the air is
greatly reduced and a saving in plant effected.
Dated this 14th day of January 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in or relating to Air-compressers for use in Raising
Liquids in Mines, Quarries, and the like.
We, EVAN EVANS, Plumber Llanrwst, Caernarvonshire, WILLIAM VEITCH,
Managing Director, North Wales Sulphur Mining Co., Trefriw Caernarvonshire
and GEORGE VEITCH, Chemical Engineer, Crieff, Perthshire, 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 has for its object mainly to effect great saving in power in
operating air compressers used in connection with mines quarries and the like for
raising water or other liquids by air pressure and it consists in utilizing the exhaust
air from the water or liquid raising plant by returning it to the air compresser.
The invention is particularly applicable in conjunction with liquid raising
apparatus of the class described in the Specification of Letters Patent No. 17,523
of 1892 represented in part in the accompanying diagram and with other like
apparatus in which the liquid to be raised is forced by air under pressure or with
pulsometers in which steam is replaced by compressed air, the air being led from
an air compresser A through pipes B and C C to a series of forcing chambers D D
the exhaust compressed air from the apparatus instead of being discharged into the
atmosphere being under the present invention returned by the piping CC from
the automatic forcing chambers D to the air inlets of the air compressing cylinder
or cylinders G at a pressure which may be considerably in excess of that of the

page_text: atmosphere the piping CC being either connected direct to the air compresser or as
shewn the air course may be through the valve casing E and by piping F to the
compresser. The exhaust compressed air thus in part actuates the piston of the
air compression cylinder as a motor and the power required for compressing the air
is greatly reduced and a saving in plant effected.
The air under pressure acts as usual alternately on the water in the forcing
chambers D and drives the water up the discharge pipe H and whilst the water is
thus forced from one chamber D the air in the other chamber is exhausted by the
stroke of the piston of the air compresser G and permits that chamber to fill with
water.
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 :-
In air compressers for use in raising liquids the arrangement whereby the
exhaust air from the forcing chambers is returned to the compressing cylinder
substantially as and for the purpose set forth.
Dated this 13th day of October 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.