June 20, 1913.

THE COLLIERY GUARDIAN.

1325

Walter Scott Ltd.

Leeds,	LEEDS STEEL WORKS.	England.

MANUFACTURERS OF

BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS,

TRAMRAILS AND PERMANENT WAY RAILS, Ac,

Pit Head Frame.

\ Erected in Works
*or inspection.

Example of 10in. * 6in. 421b. R.S Joists curved for Framework to Roadway,

ROLLED 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.

■ ♦ .

to

S3

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 STEYENS, 15, Fields Road, Newport, Mon.

Brussels Exhibition: “Grand Prix.”

Rouraix Exhirition, 1911: “Grand Prix.

ROTECT YOUR HEADGEARS

Roofs, Smoke Stacks, &c.,

FROM THE RAVAGES

OF CORROSION

BRILLIANT

BLACK COLOUR.

HOPKINSON- FERRANTI

Patent

STOP VALYE

For Steam and Hich Pressure Water Service.

The Greatest Advance in Valve Construction of the Tinies.

BY APPLYING

2 COATS

FOR DESCRIPTIVE BOOKLET “ X.,”

SUPPLIED

READY FOR USE.

OF

EASILY APPLIED by
UNSKILLED LABOUR.

WRITE
TO PATENTEES & SOLE MANUFACTURERS—

WAILES, DOVE & CO. LTD.,

Telegrams—” BITUMASTIC.” NEWCASTLE-ON-TYNE.

Power Saved

is

Money Gained.

LESS WEIGHT, COST AND LEAKAGE.

This Valve has been invented and
designed to enable a valve having
operative parts of half the ordinary
diameter to pass a large amount of
steam through a small working part.
PRINCIPLE :

Converting the pressure of the
fluid Into velocity and re-con-
verting the velocity into pressure,
thereby passing an amount of
steam equal to full carrying capa-
city of pipe.

SELLING POINTS:

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

Reduction in cost over ordinary fullway
valves.

Considerably less weight.

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

Reduces vibration in pipes.

Graded opening—no sudden rush of steam in
opening.

No bve-passes necessary, therebv saving their
cost.

Is not subject to wedging action or mechani-
cal strain.

The discs slide with a flexible pressure upon
the seats, thereby preventing cutting & scoring.

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

Al wavs easv to onen and close under pressure.

It is an ideal valve for high temperature
superheated steam, as there are no cast iron
internal working parts.

Discs and Seats of

HOPKIN SON ’ S

“PLATNAM” METAL.

Suitable with Superheated Steam.

f H ■) px< NS cW-.T E RR ANTI -PATENT-



Renold Silent Chain Drive

will save you power. It will transmit 98 °/o from the driver to the
driven, and will do so until worn out. No other form of drive will
show this efficiency.

Write for 130-page book “Renold Driving Chains and their Use.’’—Dept. 65.

HANS RENOLD LTD., MANCHESTER.

3	E/208 Q867

VALVES IN STOCK WITH IRON OR STEEL CASINGS.

UPWARDS OF 8,000 IN USE AT 220 Collieries, 180 Electric Power Stations, 90 Iron
and Steel Works, 130 Textile Mills, Turbine Makers, &c., &c.

HOPKINSON’S PATENT SAFETY BOILER MOUNTINGS AND VALVES

For High Pressure Superheated Steam, High-class Exhaust and Water Sluice

Valves for Condensing Plants, &c., Automatic Exhaust Valves, Reducing
Valves, Steam Traps, &c., &c.

Upwards of 500 tons of Standard Steel Castings kept in stock.

We can give immediate delivery of iron and steel valves.

Write for Catalogue 660, 4th Edition.

J. HOPKINSON & CO. LD.. Huddersfield

No. 286 London, Glasgow, Edinburgh, Cardiff, Oldham, Paris & St Petersburg.