March 31, 1916.

THE COLLIERY GUARDIAN.

635

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.





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

ADVANTAGES

DURABILITY.



HIGH EFFICIENCY.

BEST WORKMANSHIP.

MINIMUM MAINTENANCE

BELLISS & MORCOM LIMITED

Telegrams:

BELLISS, BIRMINGHAM.”

BIRMINGHAM

London Office :

8, VICTORIA STREET, S.W.

SHEET 22i * 35.

Winding Engine Signals

for use in Coal Mines under the

COAL MINES ACT, 1911

[Section 53.]

--------------------------Col liery.

SIGNALLING IEXCEPT IN SINNING PITS.)

WINDING.

(92.) The following signals shall be used at all
times in connection with winding in shafts:—

(a) For winding persons:-

(1) When a person is about to descend the
banksman shall signal to the onsetter 3
Before the person enters the cage the

onsetter shall signal to the banksman
and to the winding engineman - - - 3
When the person is in the cage and ready
to descend the banksman shall signal
to the winding engineman - - 2

(2) When a person is about to ascend the
onsetter shall signal to the banksman
and to the winding engineman - -	3

12

RAISE:

5

Slower
.STEADILY.

9\
k 8

RAISED®

^STOP/^B

IO>?

WINDING
SIGNALS
“NON-CUMULATIVE.”

ELECTRIC.
MECHANO-ELECTRIC.

MECHANICAL.

SIMPLE.

EFFICIENT.

INEXPENSIVE.

The “DAVIS-MACDONALD” BALL-RACE
CONTACT-MAKING RELEASE

Before the person enters the cage the
banksman shall signal to the onsetter 3

When the person is in the cage and ready
to ascend the onsetter shall signal
to the banksman and to the winding

engineman ---------- - 1
(b) For winding otherwise than with persons:-
To raise up - - - - - -	1

To stop when in motion ----- 1
To lower down	-------- 2

To raise steadily ------ 4
To lower steadily-	-	5

The above is a reduced facsimile of these signals and
can be obtained in two styles, as under—

In sheets for posting 4d. each. carriage

Mounted and Varnished 2/- each.) extra-

Please mark order C.G.—W.E., and say if sheets
or mounted copies are required.

THE COLLIERY GUARDIAN COMPANY LIMITED,

30 & 31, Furnjval Street, Holborn, London, E.C.

is the most efficient Release in connection with Visual Signals.

Signals cancelled immediately the engine starts, also stops.

Emergency Signals shewn during Winding.

ENTIRELY

ENCLOSED

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

The contact^
making arms
are

SEND FOR LIST 41 v.

JOHN DAVIS & SON (Derby) Ltd.

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