April 25, 1913.

THE COLLIERY GUARDIAN.

845

Walter Scott Ltd.

Leeds,	LEEDS STEEL WORKS.	England.

MANUFACTURERS OF

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

Head Frame.

Erected in Works
(or inspection.

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

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

STRUCTURAL STEELWORK FOR BUILDINGS, &c.

Miid 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.

M

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

CONSIDERABLY OVER

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W I 1'1 ® I W	GREAT BRITAIN

SUU	I IL Hill I w	oD THE coloni£s

Estimates and Designs on application.

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

The advantages of a drive which is

Positive but not harsh,
which Saves power and space,
Produces better work,
are the advantages of

KEN OLD SILENT CHAIN DRIVE.

HANS RENOLD LTD.

E/209

MANCHESTER.

5	Q869

WAILES, DOVE & Co.’s

Patent BITUMASTIC Solution

------------- GIVES --

PERMANENT PROTECTION FROM
CORROSION TO ALL IRONWORK.

A BRILLIANT BLACK COLOUR.	SUPPLIED READY FOR USE.

EASILY APPLIED BY UNSKILLED LABOUR,
CHEAPER THAN ORDINARY OXIDE PAINTS, OWING TO ITS
GREATER COVERING CAPACITY AND LASTING QUALITIES.

WRITE FOR PAMPHLET OF FULL PARTICULARS TO-
Head Office NEWCASTLE-ON-TYNE.
Also at London, Liverpool, Manchester, Glasgow, Cardiff, Birmingham, Leeds,
Hull, &c.
Every Office on the Telephone	,- Telegrams "BITUMASTIC.”

Roubaix Exhibition, 1911: “Grand Prix.”

™Brussels Exhibition : “ Grand Prix:'

IP’JS.T ENT

“MAC” VALVE.

r

Figure 8200—Inside	Screw

Figure 8205—Outside So'ew

Suitable for the
Highest Steam Pressures.

Fitted with

flopkinson’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and valve are withdrawn,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.

The Renewable Valve and Seat is made of

Hopkinson’s “Platnam” IVTetal

which is suitable for superheated steam and bad waters.

There are many valves with renewable valve and seat upon the market, but under modern
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” Metal 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.

Upward* of 500 ton* of Standard Steel Castings Kept in stock.

FFe can give immediate delivery of iron and steel Valve*.

Write for Illustrated Specifications and Catalogue No. 06o. 4th edition, post free.

J. HOPKINSON & C« LD Huddersfield,

Maker* of Patent Safety Boiler Mounting* and Valve*

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. 286. Oldham, Blackpool, Paris & St. Petersburg.