January 16, 1914.

THE COLLIERY GUARDIAN.

129

Trade

ST A N LEY

BRUNTON MINE TRANSIT.

Serves all the purposes of a Prismatic Compass and Clinometer.

The largest
manufacturers of
Surveying and
Drawing
Instruments
in the World.

DRAWING OF'l-'ICE STATION ERY

of all kinds supplied on the most favourable terms A very large stock kept.

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

W. F. STANLEY & CO. LTD.,

Export Dept.—Great Turnstile, Holborn, London, W.C.

Head Offices and Showrooms—286, HIGH HOLBORN, LONDON, W.C.

ALL IRONWORK

OF NEW COAL STAITHES
at DERWENTHAUGH

IS NOW BEING COATED WITH

Patent BITUMASTIC Solution

THE FINEST ANTI-CORROSIVE PAINT
IN THE WORLD.

All rile Principal Collieries use “BITUMASTIC.”

PATENTEES AND SOLE MANUFACTURERS—

WAELES, DOVE & Co. Ltd.,

NEWCASTLE=ON = TYNE, Als°

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality

COAL SCREENING & CONVEYING.

fill

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, 16, Fields Road, Newport, Mon.

COAL, GOKE & ORE BRIQUETTING
and CEMENT MAKING PLANT,
BRICK & TILE MACHINERY,

Brussels Exhishson : “ Cramp prix.”

Roubaix Exhibition, 1911: “Grano Prix.”

PATENT

MAC” VALVE.

GRINDING MILL?

GROUND AND PREPARED TO A VARYING FINENESS
IN ONE SPECIAL MACHINE ONLY.

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WM. JOHNSON & SONS,(leeds) LT D., Arm ley, Leeds.

ECONOMICAL

PLANT,

CRUSHING, GRINDING &

SCREENING PLANT,

GENERAL ENGINEERING.

Figure 8200—Inside Scx>e-w
Figure 8205—Outside Scx*cw

Suitable for the
Highest Steam Pressures.

Fitted with
Hopkinson*sPlatnam ”
Metal Renewable Valve
and Seat.

All parts interchangeable.

All joints made by metallic
contact, thereby obviating the
necessity of using jointing
material.

By removing the cover the seat
and valve are withdrawn,
enabling new parts to be in-
serted in about a minute’s
time, and without the neces-
sity—as with ordinary valves
—of removing the valve body
from its fixed position.

and Seat is made of

The Renewable Valve

Hopkinson’s “ Platnam ” Metal

which is suitable for superheated steam and bad waters.

There are many valves with renewable valve and seat upon the market, but under modem
conditions and high pressures do not last any length of time owing to the deterioration which
takes place on the valve and seat, and consequently the renewing of the parts is a frequent
occurrence. We have tried our “Platnam” Metafl under severe conditions, and,have every
confidence in recommending it to work under high temperatures. The “MAC” valve has
been designed to adopt this metal for the renewable valve and seat.

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

We can give immediate delivery of iron and steel Valves.

Write for Illustrated Specifications and Catalogue No. 66o, 4th edition, post free.

J. HOPKINSON & Cfi L« Mersfielil,

Makers of 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.

Depots & Showrooms—London, Glasgow, Edinburgh, Cardiff,
No. 275. Oldham. Blackpool, Paris & St. Petersburg.