August 6, 1915.

THE COLLIERY GUARDIAN.

265

MINE FANS

Give Satisfaction.

PLOWRIGHT BROS. LTD.,
Brampton Iron Works, Chesterfield.

Speciality-

COAL SCREENING»CONVEYING

Extract of Letter from a Mine Manager;

“I can say without hesitation that the Fan
has given us every satisfaction, and that it is
everything the Makers represent it to be.
This Fan has proved that it is superior to
any other Fan that we have had in use.”

WELL DESIGNED AND WELL MADE

THEREFORE

EFFICIENT AND RELIABLE.

r.

' y.J

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.



DAVIDSON & Co. Ltd.,

Sirocco Engineering Works,

BELFAST.

CONSIDERABLY OVER

inn pi antc ~

lUU I iLslIw I W AND THE colonie£

Estimates and Designs on application.

Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mon.

PRINCEPS & CO.,

SHEFFIELD.

Patentees and Manufacturers of

Patent “Deflector” Oil
Extractor,

“ Little Scorcher ” Steam
Dryer,

Steam Traps,
Metallic Packings, etc.

Extractors for the following Steel
Works are erected or in the
course of erection.

Patent Shaft & Axletree Co.

Frodingham Steel & Iron Co.
Barrow Haematite Steel Works.
Parkgate Steel & Iron Co.

Powell Duffryn Steam Coal Co.

Blaenavon Company Ltd., Etc.

HIGHEST EFFICIENCY GUARANTEED.

HOPKINSON-FERRANTI

PATENT

STOP VALVE

For Steam and High Pressure Water Service.

The Greatest Advance in Valve Construction of the Tinies.

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
pressure.

Discs and Seats of

HOPKINSON’S

“ PLATNAM ” METAL.

Suitable with Superheated Steam.

PI$iNsJrJ'-f ERRANTl-PATENT |

Illustrated Specifications and
Catalogue free on application.

■r 1 W,
HOPI$iNsd%-F£RF



J. HOPKINSON & Co. Ld.,

Makers of Patent Valves and Patent Safety Boiler Mountings,

HUDDERSFIELD.

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

Nn. 306.