January 31, 1913.

THE COLLIERY GUARDIAN.

221

II

PNEUMATIC ASH TANK

COATED WITH

WAILES, DOVE & Co.’s

— PATENT —

“BITUMASTIC"

Solution & Enamels.

The “ World’s Record”
Anti-Corrosives.

Write for Descriptive Booklet to^Original Patentees—

WAILES, DOVE & Go. Ld., Newcastle=on=Tyne.

Also at London, Liverpool, [Manchester,! Glasgow, Cardiff.
Birmingham, Leeds, Hull, &c.

every office on the telephone.	Telegrams:—“ BITUMASTIC.	*

SAMSONITE

A AT THE

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield

Speciality -

COAL SCREENING & CONVEYING.





SECTION OF SCREENING PLANT AT BENTLEY COLLIERY. DONCASTER,

CONSIDERABLY OVER

Official figures for 191/ show

SAMSONITE MOST USED.

MONOBEL* th* most popular coal seller.

NOBEL GLASGOW

100 PLANTS

NOW AT WORK IN
GREAT BRITAIN
AND THE COLONIES.

Estimates and Designs on application.

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

Walter Scott Ltd.

Leeds,	LEEDS STEEL WORKS.	England.

MANUFACTURERS OF

BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS,
TRAMRAILS AND PERMANENT WAY RAILS, Ac.

Pit Head Frame.

Erected in Works
for inspection.

Example of 10 in. x 6 in. 421b. R S. Joists curved for Framework to Roadway.

ROLLED STEEL JOISTS for PIT PROPS,
FRAMEWORK TO ROADWAYS, &c.

STRUCTURAL STEELWORK FOR BUILDINGS, &c.

Mild Steel Blooms, Billets, Slabs, Tinbars. Rounds & Flats.

Rolls cut for Special Sections and to approved quantities.

Books of Sections and other information on application.

Brussels Exhibition, “Grand Prix,” Allahabad, 1910.

Roubaix Exhibition, 1911, “Chand Prix.”

“RDS” STEAM TRAP

LATENT

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.

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



SPECIAL FEATURES.

Simplicity. Reliable. Quick
in action. No Dribbling.

Strong Intermittent Water
Discharge. Quick Cut-off.

Will lift its water 2 feet for
every~l 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 tills 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 inte 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.

Write for Catalogue 660, 2nd Edi’ion, 343 pages, post free, which illustrates and
describes 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. HOPKINSON A GO. LD..

No.2S6. HUDDERSFIELD.