August 11, 1916.

THE COLLIERY GUARDIAN.

251

SIMPLEX
WATERTIGHT
BULKHEAD
FITTINGS

are manufactured at our
Birmingham Works, in cast
iron or brass.

Supplied to Admiralty, War
Office, and Government
Departments.

Simplex Conduits Ld.5

WORKS :
GARRISON LANE,

BL ‘ BIRMINGHAM

I

F

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COIL SCREENINGiCONVEYING

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

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Estimates and Designs on application.

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

Walter Scott Ltd.

Leeds,	LEEDS STEEL WORKS,	England.

MANUFACTURERS OF

BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS,
TRAMRAILS AND PERMANENT WAY RAILS, &c.

Example of 10 in. x 6 in. 42 lb. R.S. Joists curved for Framework to Roadway.

Pit Head Frame,
k Erected in Works
for inspection.

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ROLLED STEEL JOISTS for PIT PROPS,
FRAMEWORK TO ROADWAYS. Ac.

STRUCTURAL STEELWORK FOR BUILDINGS, Ac.

, Mild Steel Blooms, Billets, Slabs, Tinbars, Rounds & Flats.

Rolls cut for Special Sections and to approved quantities.

Books of Sections and other information on application.

HOPKINSON-FERRANTI

PATENT

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
pressure.

Discs and Seats of

HOPKINSON’S

“ PLATNAM ” METAL.

Suitable with Superheated Steam.

Illustrated Specifications and
Catalogue free on application.

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J. HOPKINSON & Co. Ld.,

Makers of Patent Valves and Patent Safety Boiler Mountings,

HUDDERSFIELD.

London, Glasgow, Edinburgh, Cardiff, Oldham, Paris & Petrograd.

No. 342.	"