1170

THE COLLIERY GUARDIAN.

December 10, 1915.

STEAM, MOTOR, BELT, OR ROPE=DRIVEN

AIR & GAS COMPRESSORS

From 50 to 15,000 cubic feet

FOR

ADVANTAGES :—

S1MPLICITY.

RELIABILITY.

SELF-LUBRICATION.

SMALL FLOOR SPACE.

COLLIERIES, MINES

Etc

BEST WORKMANSHIP.

MINIMUM MAINTENANCE

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

ADVANTAGES:--

DURABILITY.

HIGH EFFICIENCY.



BELLISS & MORCOM LIMITED

Telegrams:
“BELLISS, BIRMINGHAM.”

BIRMINGHAM

London Office :

8, VICTORIA STREET, S.W.

ooa

LBAblCja

(tub
BOLTS

[CUPAS?

A

Onion

Bran d

©

icm

HOWARD STREET

12

RAISE]

Slower

.STEADILY^

—v’ «
9\

C8/

IEI

4

5^1

raise^M

^STOP/^

WINDING
SIGNALS
“NON-CUMULATIVE.”

ELECTRIC.
MECHANO-ELECTRIC.
MECHANICAL.

SIMPLE.

EFFICIENT.
INEXPENSIVE.

The “DAVIS-MACDONALD” BALL-RACE

CONTACT

RELEASE

is the most efficient Release in connection with Visual Signals.

Signals cancelled immediately the engine starts, also stops.

Emergency Signals shewn during Winding.

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.