762

THE COLLIERY GUARDIAN.

October 15, 1915.

GREENWOOD & BATLEY Ltd.,
ALBION WORKS, LEEDS.

Tolephone 5200 LEEDS.	I	TeWam.—" GREENWOOD. LEEDS.”

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STEAM TURBINES

HIGH PRESSURE,—EXHAUST STEAM,—MIXED PRESSURE.
FROM 3-B.H.P. TO 600-B.H.P.

Part of order for
totally enclosed gas-
proof Mining Motors
with ball bearings and
plate glass spy holes.

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ELECTRIC MOTORS

AND GENERATORS, A.C. AND D.C. FOR ALL PURPOSES.

GOODALL, CLAYTON & Co. Lo.

LEEDS.

Telegrams :—
“ Vertical, Leeds.”

Telephone:—1982, Leeds.

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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.

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See RULE 1.5, fjztr*. 1.

SPECIAL ELECTRICITY IN MINES RULES.

“ That Signalling Apparatus shall be so constructed and
worked that there shall be no open sparking.”

DAVIS-FRYAR

MECHANOELECTRIC SIGNALS









For Haulage Planes, &c., in Gassy Mines.
PATENT No. 5919

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Flexible
Pull-wire.

Flexible
Pull-wire.

Oil Contact Chamber.



This System is considerably cheaper than gas-proof pushes, and more efficient.

Arrangements can be made to see the System in operation in the mine.



SEND FOR LIST No. 41 F.

JOHN DAVIS & SON

(Derby) LTD

ALL SAINTS WORKS, DERBY ;

■ ■ & 17, Victoria St., Westminster, London, S.W.

’ Telegrams—“ Davis, Derby.” Telephone—240 Derby.