February 11, 1916.

THE COLLIERY GUARDIAN.

259

QUALITY m SWITCH GEAR.

LIQUID
SWITCH
GEAR
of
HIGH-
CLASS
MAKE
and
GOOD
DESIGN.

WRITE
for
LIST

No. 60
with

PRICES
and
OUTPUTS

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENING s CONVEYING

J. H.

HOLMES & CO., Newcastle-on-Tyne.

Trade

Tha Largest Manufacturers of

SURVEYING and
DRAWING INSTRUMENTS
in the World.

Theodolites, Levels, Mining Dials,
Prismatic Compasses, Plane Tables,
Drawing Instruments & Drawing
Office Stationery, etc. All of the
highest quality.

Please send for our “K.12” Catalogue,
and compare our prices with those of
other first-class makers.

Stanley’s Patent Mining Dial Telescope win
read 90° both ways.
The most complete Dial obtainable.

W. F. STANLEY & Co. Ld.,
Head Offices & Showrooms:
286, HIGH HOLRORN, LONDON, W.C.

ELECTRIC PLANT ^ACCESSORIES

LAMPS.

HASLAM u STRETTON,U,D
11,WINDSOR PLACE,
CARDIFF. . .

TELEG- THON”

TELEP: 2978 (TWO LINES)

■X-

STEAM
TURBINES.

High Pressure
Mixed Pressure
Low Pressure

FOR

Ironworks

AND

Collieries.

Standard M.P. Turbine.

Reliable.
Economical.
Compact.

Richardsons Westgarth & C“ LTD

MIDDLESBROUGH. HARTLEPOOL. SUNDERLAND.

.W

'• 0’

<’

’Sai

' ■”W*'’»*/■* ■

■ x SSL*

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.



CONSIDERABLY OVER.

inn pi antq

IUU I LHIV I U AND THE colonies

Estimates and Designs on application.

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

HOPKINSON - FERRANTI

PATENT

STOP VALVE

For Steam and High Pressure Water Service.

The Greatest Advance in

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 Specifications and
Catalogue free on application.

Valve Construction of the Times.

J. HOPKINSON & Co. Ld.,

Makers of Patent Valves and Patent Safety Boiler Mountings,

HUDDERSFIELD.

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

No. 342.