206

THE COLLIERY GUARDIAN.

February 4, 1916.

STEAM, MOTOR, BELT, OR ROPE=DRIVEN

AIR & GAS COMPRESSORS

From 50 to 15,000 cubic feet

FOR

COLLIERIES, MINES, Etc.

ADVANTAGES

SIMPLICITY.

RELIABILITY.

SELF=LUBRICATION.

SMALL FLOOR SPACE.

■ ■■

■

ADVANTAGES

DURABILITY.

HIGH EFFICIENCY.

BEST WORKMANSHIP.

MINIMUM MAINTENANCE

One of Two 1,400 c.f. Air Compressors, in De Beers Mines S.A.

r‘i	_____________________

f

BELLISS & MORCOM LIMITED,

Telegrams :	RID IVf I	A TV!	London Office :

BELLISS, BIRMINGHAM.”	D>1 IV.1V111^1	8, VICTORIA STREET, S.W.

GOODALL, CLAYTON & Co. Lo.

Telegrams :—
“Vertical, Leeds.”

Telephone:—1982, Leeds.

LEEDS.

MAKERS AND ERECTORS OF

SCREENING PLANTS, PICKING BELTS, SCREENS,
PITHEAD GEARS.

BUNKERS, ROOFS, STEEL STRUCTURAL WORK, &c.

GAS RETORT INSTALLATIONS, CONVEYING PLANTS.

Representatives:—H. L. CHESTON, Clarendon House, Boston Spa, Yorks.

W. OGDEN DAYSON, 1, Mount Street, Swansea, for South Wales.

lower

12

RAISEi

RAISE
.STOP,

n-OWER

.STEADILY.

9\
k 8

<4

5 J

WINDING
SIGNALS
“NON-CUMULATIVE.”



ELECTRIC.
MECHANO-ELECTRIC.
MECHANICAL

SIMPLE.

EFFICIENT.
INEXPENSIVE.

The “DAVIS-MACDONALD” BALL-RACE

CONTACT-MAKING RELEASE

is the most efficient Release in connection with Visual Signals.

Signals cancelled immediately the engine starts, also stops.

Emergency Signals shewn during Winding.

©5^=

The contact-
making arms
are

ENTIRELY

ENCLOSED

from dust, oil,
etc. (not shown
in the
illustration).

SEND FOR LIST 41 v.

JOHN DAVIS & SON (Derby) Ltd.

All Saints Works, DERBY ; & 17, Victoria Street, Westminster, S.W.