June 15, 1917

THE COLLIERY GUARDIAN

1119

PROOF!!!

Simplex System of Steel
Conduits for the efficient encase-
ment of Electric Wiring Cable, con-
sists of a combination of smooth
bore Steel Tubes or Conduits, used
in conjunction with malleable cast-
iron fittings and accessories, so as to
form a complete Covering, specially
designed to meet the requirements
of high-class installation work, and
the saving of time and labour in
erection, with the further object of
effecting a general reduction in cost
of efficient Conduit Wiring.

The Simplex Conduit System
has been developed during a period
of many years, and is the outcome
of patient labour on the part of
our designing and manufacturing
engineers, whose energies have been
directed continually towards the bet-
terment of the Simplex Conduit
Wiring System. Many thousands of
installations, carried out on the
Simplex System, are giving con-
tinuous satisfaction in all parts of
the world to-day.

We have it
demonstrated daily
by—

Satisfied

Customers

Repeat Orders

Appreciative

Letters

Convincing
Evidence

WE HAVE GAINED the REPUTATION
FOR GIVING STERLING SERVICE.

Simplex Conduits

Limited.

Head Office and Works:

Garrison Lane, BIRMINGHAM.

113-7, Charing Cross Road, LONDON.

MANCHESTER. GLASGOW. BRISTOL.
NEWCASTLE. LEEDS. LIVERPOOL.
SWANSEA. CARDIFF and SHEFFIELD

6% TO 8% SAVING IN FUEL, or12% TO 15% MORE STEAM



SINGLE HOOD

Circulator

39,Victoria Street, London, S. W. 1

New Forms, &c.,

Recently issued under
the Coal Mines Acts.

------ Full pai’ticulai's on application. -----------

THS com IERY GUARDIAN CO. LTD., 30 S- 31, Furnival Streit, Holborn, London. E.C. 4.

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Tel. Address—

“Glen," Killamarsh.

Telephone—

Eckington No- 48.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENINGs CONVEYING

-w







SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

CONSIDERABLY OVER
100 PLANTS H
Estimates and Designs on application

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

WORK IN
BRITAIN
COLONIES.

“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.

Mining Steel.

High Speed Steel.

Coal Cutter Steel.

Chisel Steel.

Steel Castings.

Buy from the Makers—

James Glen & Co.

Killamarsh Steel Works,

KILLAMARSH, SHEFFIELD.

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

I

I

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 O, 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 P 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 of 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.

J. H0PKINS0N & CO. LD.,

HUDDERSFIELD.

No. 374.