June 16, 1916.

THE COLLIERY GUARDIAN

1131

A MOST varied and complete range
of WATERTIGHT FITTINGS,
suitable for Factories, Mills & Collieries.

CAN BE

SUPPLIED

FROM

STOCK.

N9S7<

N?ais

Watertight
Fittings

Simplex

Factorx

Simplex

Hand Lambs.

UM

VJI

CAN BE
SUPPLIED
FROM
STOCK.

In addition, we supply Electric Hand-
Lamps, expressly designed to comply
with the Home Office Regulations.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality

COAL SCREENING « CONVEYING

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SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

SIMPLEX CONDUITS LIMITED

GARRISON LANE, BIRMINGHAM

Telegrams : “ Economy, Birmingham.” Telephone : No. 535 (4 lines') Victoria, Birmingham.

113-117, Charing Cross Boad, London, W.C.

16, Corporation Street, Manchester.

72a, Waterloo Street, Glasgow.

61, High Bridge, Newcastle.

11, Denmark Street, Bristol.

96, Whitechapel, Liverpool.

6, White Horse St., Boar Lane, Leeds.

14, Heathfield Street, Swansea.

4, Westgate Street, Cardiff.

1, Crimon Place, Aberdeen.

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.

•ETC..

TELEP: 2978 (TWO LINES)

TELEG- -THOR”

HASLAM & STRETTON,U,D
ll.WINDSOR PLACE,
. . CARDIFF. . .

ELECTRIC PLANT^ACCESSORIES

CABLES & SWITCHES.

CARBON &• METAL	Hi

LAMPS.	Ml

“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.

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STEAM

TURBINES.

High Pressure
Mixed Pressure
Low Pressure

FOR

Ironworks

AND

Collieries.

Standard M.P. Turbine.

Reliable.

Economical,
Compact.

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

HOPKIN SON/

■' Bfil

SPECIAL FEATURES.

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.

Description,

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.

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.

Richardsons Westgarth & C° LTD

MIDDLESBROUGH. HARTLEPOOL. SUNDERLAND.

J. HOPKINSON & CO. LD,

HUDDERSFIELD.

No. 342.