August 7, 1914.

THE COLLIERY GUARDIAN.

301

n

LOWER

STEADILY

RAISE

STEADY

RASE

TOP

“ NON-GUMULATIVE ”

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.

______________

INDICATOR BEFORE MEN SIGNALLED.

MEN

LOWER

STEADILY

RAISE

STEADILY

RAISE

TOP

LOWER

INDICATOR AFTER MEN SIGNALLED.

Davis’s Mechanical

__________________________

The Non-cumulative Indicator is designed to overcome
the objections expressed by colliery managers and winding
enginemen of having an indicator which accumulates (3
& 1) and (3 & 2). The indicator now offered has two
plungers (not illustrated). It is otherwise similar to our
original indicator.

__________________________

Send for List 41V,

JOHN DAVIS & SON

(DERBY) LTD

All Saints Works, DERBY,

and 17, Victoria Street,

WESTMINSTER, S.W.

from the Makers:

CUTTER PICKS,
HOLLOW DRILL STEELS
TWIST DRILL STEELS

READY FOR USE IN ALL
MAKES OF MACHINES.

Buy

THE HARDY PATEHT PICK CO. L°

SHEFFIELD.

THE PATENT UNDERGROUND ROLLER CONVEYORS

___	  SYSTEM HINSELMAN -___

They are
distinguished
by their
Simplicity,
Easy Handling,
Durability,
and
Greatest
Efficiency.

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

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 further particulars.