July 10, 1914,

THE COLLIERY GUARDIAN.

69

Banksman

Onsetter

'raise

■ LOWEP^
NkOOWN

.OWEP.X
K DOWN

LOWER
STEADILY,

^RAISE
iTEADliy

MEN
ON

MEN
ON

ZERO /

\	/ RAISE.'

T stop

ZERO/
\_____/ raise'

'A^a^5'T0P

APPROVED

WINDING

SIGNALS

complying with Rule 95,
General Regulations, 1913.

DAVIS’S

Self-contained

SOLENOID BELL

with DIAL INDICATOR.

System 102.

Patent applied for No. 7241.

SIMPLE.

EFFICIENT.

INEXPENSIVE.

MULTIPLE CABLES DISPENSED WITH.

Can be worked off existing
electrical or mechanical wires.

Send for List 41 V.

JOHN DAVIS & SON

(Derby) LTD.,

ALL SAINTS WORKS, DERBY;

& 17, Victoria St., Westminster, London, S.W.

Telegrams—“ Davis, Derby.” Telephone—240 Derby.

KEITH MINE FAN5.



Motor-driven Keith Fan for In-bye Ventilation.

Keith Mine Fans are made
IN THE LARGEST SIZES WITH
SIMPLE REVERSING ARRANGEMENT

HIGHEST EFFICIENCY AND
STRONGEST CONSTRUCTION.

James Keith & Blackman C L™

27, Farringdon Avenue, LONDON.

And at Cardiff, Newcastle, Manchester, Leeds, Glasgow, &c.
___________1______________________________

--------------THE PATENT------------------------

UNDEH6RDUN0 ROLLER CONVEYORS

—-— SYSTEM HINSELMAN —-

were the first of its kind on the market, and are
known to be superior to others in existence.

They are distinguished by their Simplicity, Easy Handling, Durability, and Greatest Efficiency.
Cause Uniform Advancement of the Working Face by Cheapening and Largely Increasing the
Output.

Above 120,000 yards of Hinselman Patented Eccentric Roller Conveyors are at work in a great number of mines, giving
complete satisfaction, even in the lowest workable seams.

Unique method for facilitating the transport of coal from the seam to the tubs in loading road and simplifying the hauling by avoiding
unnecessary gateways.

Conveyors are obtainable from—

THE NEW MIGRATING PITPROP AND MINING OUTFIT CO.,
Chester Road, Erdington, BIRMINGHAM,

who will be pleased to supply 1 further particulars.