December 24, 1914.

THE COLLIERY GUARDIAN.

1319

MARK

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

MINE FANS

Speciality

COAL SCREENING & CONVEYING

Deliver more air at less cost for power than
the ordinary paddle blade Fan. Sirocco Fans
can be arranged for reversal of air current.

DAVIDSON & Co. Ltd.,

Sirocco Engineering Works,

BELFAST.

..

--- ' . - i

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

CONSIDERABLY OVER

100 PLANTS

NOW AT WORK IN
GREAT BRITAIN
AND THE COLONIES.

Estimates and Designs on application.

Agent for South Wales: A. LEIGHTON STEVENS, 16, Fields Road, Newport, Mon.









ALBERT FROST&C?,

HOWARD STREET,
SHEFFIELD.

HOPKINSON-FERRANTI

PATENT

TRRM

WIRE

WIRE: ALFRO,SHEFFIELD.
’PHONE: .<4366,CENTRAL.
CODE*. fl.B.C. <=Fth e9,

PfXTEHT , 1

F DO G
SPIKES

f' r

Lr

4

STOP VALVE

For Steam and High Pressure Water Service.

The Greatest Advance in Valve Construction of the Times.

PRINCIPLE :

Converting the pressure of
the fluid into velocity and re-
converting the velocity into
pressure, thereby passing an
amount of steam equal to full
carrying capacity of pipe.

SELLING POINTS:

Passes same quantity of steam as a full-
bore valve.

Seats half diameter of ordinary sluice
valve, therefore halves possible leakage.

Graded opening—no sudden rush of steam
in opening.

Is not subject to wedging action or
mechanical strain.

When the valve is open the seats are pro-
tected from the flowing fluid by the eyepiece.

Always easy to open and close under

Discs and Seats of

HOPKINSON’S

“ PLATNAM ” METAL.

Suitable with Superheated Steam.

Illustrated Speci/ieations and
Catalogue free on application.

THESPEC/NL'LINES' WE HANDLE
QUICKESTDELIVERY'GURRflNTEED

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Illi

J. HOPKINSON & Co. Ld.,

Makers of Patent Valves and Patent Safety Boiler Mountings,

HUDDERSFIELD.

London, Glasgow, Edinburgh, Cardiff, Oldham, Paris & St. Petersburg.

No. 3(>6.