208

THE COLLIERY GUARDIAN.

July 30, 1915.

Wrought Iron and Steel Tubes.

SPECIAL JOINT.

These Tubes are specially suitable for
mines, being both light and strong.
The Joint, as illustrated, can be easily
connected, and a tube can be removed
without disturbing the run.

Fittings of all kinds supplied.

Unproved Albion Loose Flange Joint.

STEWARTS and LLOYDS LTD.,

PIT PROPS.

We manufacture Tubular Steel Pit
Props, which are exceptionally strong
and durable. They can be used
repeatedly and have a high factor
of safety.

Lists sent on application.

GLASGOW-41, Oswald Street.
BIRMINGHAM—Broad Street Chambers.
LONDON-Winchester House, Old Broad Street.

PRESGOT
GATE END BOX

(Patent No. 29774/12).

Illustration shows Box with Switch and Fuse Covers removed.

Substantially designed and embodying the following
important features :

1.	The cover can only be opened when switch is off.

2.	Live terminals protected so that when cover over fuses is off, they cannot be touched.

3.	Current cannot be switched on until cover over fuses is closed, and plug in circuit.

4.	Plug can only be inserted into, or withdrawn from, dead contacts.

5.	Plug is provided with earth terminals, and when inserted makes automatic contact

with Box before, and breaks contact after, the circuit connections.

Made at Prescot by

BRITISH INSULATED & HELSBY CABLES LTD.,

Head Office - PRESCOT, Lancashire.
Works -	• Prescot & Heisby.