September 10, 1915.

THE COLLIERY GUARDIAN

515

Walter Scon Ltd.

Leeds,	LEEDS STEEL WORKS,	England.

MANUFACTURERS OF

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

><$><$■ <$ #

Head Frame.

Erected in Works
for inspection.

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

ROLLE® STEEL JOISTS for PIT PROPS,
FRAMEWORK TO ROADWAYS. &c.

STRUCTURAL STEELWORK FOR BUILDINGS, &c.

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.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENING & CONVEYING

K-

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.







CONSIDERABLY OVER

100 PLANTS H

Estimates and Designs on application.

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

WORK IN
BRITAIN
COLONIES.

GREENWOOD & BATLEY Ltd.,
ALBION WORKS. LEEDS.

Telephone-5200 LEEDS.	|	Telegrams—“GREENWOOD, LEEDS.”

HOPKINSON- FERRANTI

PATENT

STOP VALVE

For Steam and High Pressure Water Service.

The Greatest Advance in Valve Construction of the Tinies.

STEAM TURBINES

HIGH PRESSURE,—EXHAUST

FROM 3-B.H.P.

STEAM,—MIXED PRESSURE.
TO 600-B.H.P.

Part of order for
totally enclosed gas-
proof Mining Motors
with ball bearings and
plate glass spy holes.

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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ELECTRIC MOTORS

J. HOPKINSON & Co. Ld.,

Makers of Patent Valves and Patent Safety Boiler Mountings,

HUDDERSFIELD.

AND GENERATORS, A.C. AND D.C. FOR ALL PURPOSES.

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

No. 306.___________________________________________