September 18, 1914.

THE COLLIERY GUARDIAN.

609

Walter Scon Ltd.

Leeds,	LEEDS STEEL WORKS,	England.

MANUFACTURERS OF

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

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

Pit Head Frame,
k Erected in Works
for inspection.

■ / <$>

F J*

& j

IS ®

♦ V I
k Z ffi

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

STRUCTURAL STEELWORK FOR BUILDINGS, Ac.

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.

KEITH MINE FANS

Motor-driven Keith Fan for In-bye

Ventilation

James Keith & Blackman C" LT?

MADE

WITH

HIGHEST EFFICIENCY AND
STRONGEST CONSTRUCTION.

Keith Mine Pans are
IN THE LARGEST SIZES
SIMPLE REVERSING ARRANGEMENT,

2,7, Farringdon Avenue, LONDON.

And at Cardiff, Newcastle, Manchester, Leeds, Glasgow, &c.

LOWER

SIFflDILY

RAISE

STEADILY

RASE

TOP

LOWER

“ NON-CUMULATIVE ”

WINDING SIGNALS

complying with Rule 95, General Regulations 1913.

SIMPLE. EFFICIENT. INEXPENSIVE.

'Patent No. 7638, and Patents Nos. 7241, 17607,
and 11780 applied for.

Davis’s Electrical

Bell and Indicator

can be worked off existing
electrical or mechanical
wires.

BOILER HOUSE ECONOMY

The Heywood Patent Furnace Bars
and Smoke Burner Combined

ssss*^**



The illustration shows the Bars made in 5 ft. or 6 ft. lengths, with ribs cast on.
This Bar has been designed to meet the requirements of Collieries, Steel Works,
Forges, Locomotives, Steamers, and all other types of Furnaces that are very hard fired.

Write for Catalogue and price to—

The “HEYWOOD” AIRTIGHT DAMPER CO. LTD

Grove Foundry, Gomersal, LEEDS.

INDICATOR AFTER MEN SIGNALLED.

RAISE

STEADILY

LOWER

STEADILY

RASE

TOP

LOWER

INDICATOR BEFORE MEN SIGNALLED.

Davis’s Mechanical

Bell and Indicator.

The Nou-cumulative Indicator is designed to overcome
the objections expressed by colliery managers and winding
enginemen of having an indicator which accumulates (3
& 1). That now offered has two plungers (not illustrated).
It is otherwise similar t > our original indicator.

Send for List 4-1 K

JOHN DAVIS & SON

(DERBY) LTD.,

All Saints Works, DERBY,

and 1 7, Victoria Street,
WESTMINSTER, S.W{

POWDER.

Full parti colors on application to—

BRADLEY PULVERIZER CO.

37, WALBR00K, LONDON, E.C.

PREVENT COAL MINE EXPLOSIONS
by dusting your mine with stone ground in the
GIANT GRIFFIN MILL,
As supplied to the leading Collieries.

Advantages—

MAXIMUM PERCENTAGE OF “FLOUR” OR IMPALPABLE___
MAXIMUM FINENESS.

MAXIMUM

OUTPUT.

MINIMUM POWER.

MINIMUM WEAR AND TEAR.

No Auxiliary Apparatus required for
Finishing the Product.

Heavy Construction.

OVER 3,000 CRIFFIN MILLA INSTALLED.

Also extensively used for grinding
COAL. LIMESTONE. PORTLAND CEMENT.
PHOSPHATE ROCK. ORES OF ALL KINDS.