December 17, 1915.

THE COLLIERY GUARDIAN

1231

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IB GOSFORTH FOUNDRY Co. Ltd,
Malleable Iron founders,
DRONFIELD, near SHEFFIELD.

Makers of all kinds of Driving and Elevator Chains, Sprocket Wheels, Elevator Buckets, &c.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENING. CONVEYING

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SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.





CONSIDERABLY OVER

100 PLANTS

NOW AT WORK IN
GREAT BRITAIN
AND THE COLONIES.

Estimates and Designs on application.

Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mon.

ROPE
DRIVING.

FOR EFFICIENCY
DURABILITY USE S™®'

DIPLOMAS OF HONOUR

BRUSSELS and TURIN.

Illustrated Lecture on—
‘ THE TRANSMISSION
OF POWER BY
ROPES.”

Post Free on Application.

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kv* ft
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LONDON OFFICE :

95 & 97, Finsbury Pavement,
E.C.

Telegrams:
“ Kenyon, Dukinfield.”
Telephone:
494 Ashton.

“RDS” Steam Trap

PATENT

Suitable for any Pressure.

A large number of these traps have been in use for several years, and our experience has been so
satisfactory that we have every confidence in recommending them to steam users. The workman-
ship and material are of the highest quality, and it is altogether a far superior article to the many
cheap bucket traps now on the market.

SPECIAL FEATURES.



Wm. KENYON & SONS Ltd,

CHAPEL FIELD WORKS,
DUKINFIELD, near MANCHESTER.

MAPS of the BRITISH COALFIELDS,

Published jointly by the COLLIERY GUARDIAN Co. Ltd. and

3

KEY MAP OF

THE

UNITCP KINOOOM

Messrs. W. & A. K. JOHNSTON.

THE attention of Coal Owners, Coal Ex-
porters, Coal Factors, Coal Consumers
and commercial men generally is par-
ticularly called to the above Maps, which
have been specially prepared, and show the
Collieries and their position with regard to
Railway Communication, Shipping Ports
and Canals.

These Maps will be found to be of incal-
culable value to all connected with the Coal
Trade, either as buyers or sellers; while
manufacturers of Mining Specialities and all
whose business takes them to Collieries will
appreciate their value as a time and money
saver.

Lines of Railways are distinguished by
different colours.

1. Scotland.	3. South Wales.

2. North of England. 4. North Midland.

S. South Midland.

Size of each Map, 35 by 22 in.

Simplicity. Reliable. Quick
in action. No Dribbling.

Strong Intermittent Water
Discharge. Quick Cut-off.

Will lift its water 2 feet for
every 1 lb. steam pressure.

Fitted with Valve and Seat of
HOPKINSON’S “ PLATNAM ”
METAL, which is five times
harder than bronze and ad-
mirably suitable for with-
standing the cutting action
of the water.

This steam trap is of the open float
type, and consists in its simplest form of
a Water Chamber A, Float with central
guide B, Valve C, Water Inlet Pipe,
and Water Discharge Pipe. The dis-
charge pipe forms the guide for the float.

The valve remains on its seat until the
float has sunk low enough to touch the
collar on valve; it then immediately
begins to discharge.

The Gallery or Water Pocket F is an
important feature, as it fills with water
when the float is at rest; when the float
begins to rise from its lowest position,
the water thus collected flows through
the hole G into the body A, thus ensuring
a rapid elevation of the Float indepen-
dent of a small amount of water passing
into the trap. The valve is not rigidly
connected with the bucket, and it is
therefore held on to its seat until the
Float acts on the Valve. This device is,
therefore, most valuable under all con-
ditions or working, but more especially
when the volume of water entering the
trap is small. Its lifting effect on the
Float is indicated by the sharpness with
which the water discharge is cut off.

CAST IRON BODY AND LID,
HOPKINSON’S “PLATNAM” Metal Valve & Seat.

HOPKINSON’S PATENT SAFETY BOILER MOUNTINGS AND VALVES for High Pressure
Superheated Steam, High-class Exhaust and Water Sluice Valves for Condensing Plants, &c.,
Automatic Exhaust Valves, Reducing Valves, Steam Traps, &c., &c.

PRICES of each Map:—In Sheet, 4s.; Mounted on Cloth, Rollers and Varnished, 6s.;
Mounted on Cloth and in Titled Cloth Case, 6s., post free.

30 & 31, FURNIVAL STREET, HOLBORN, LONDON, E.C.

J. HOPKINSON & GO. LD

HUDDERSFIELD

No. 342.