1176

THE COLLIERY GUARDIAN.

June 6, 1913.

THE

Duplex

ZE

2

me/1

PlaltE

ft	• *

patent,Duplex



(Patent)

Valveless Gas Engine

The simplest and most reliable Engine on the market.

NO

NO

NO

ADMISSION VALVES.
EXHAUST VALVES.
CAMS.

NO

NO

NO

SIDE-SHAFTS.

VALVE POCKETS.

INTRICATE CASTINGS.

Full

Automatic Forced Lubrication.

Easy to

Overhaul. Steady Running.

The “Duplex” represents the highest standard of Gas Engine Construction. Its compactness
in relation to the power it develops involves less initial cost in foundations and engine
house than any other of equal rating It also effects substantial economies in running costs.

EVERY = STROKE

DRIVING = STROKE

Our Staff of Engineers is at the service of colliery owners to investigate the
conditions of any new works or extensions, and advise as to the advantages
or otherwise of gas power. We invite you to avail yourself of their experience.

WRITE FOR BOOKLET.

Park Works

Manchester

Queen Anne's Chambers,
London, S.W.