April 24, 1914.

THE COLLIERY GUARDIAN

889

Contractors’ Plant for Sale.

TO BE INSPECTED AT

JOHN AIRD & CO.’S DEPOT, FULHAM.

6-wheel Coupled LOCOMOTIVE, 12 in. cylinder, 17 in. stroke, copper firebox and
brass tubes, 4 ft. 8|in. gauge

6-wheel Ditto, Ilin, cylinder, 18in. stroke.

4-wheel Ditto, 8 in.	„	14 in. „

4-wheel Ditto, 10 in.	„	14 in. „

and several others, also

PORTABLE ENGINES, from 6-h.p. to 30-h.p., all in first-class condition, ready
for work.

25-h.p. PORTABLE BOILER by Davey, Paxman & Co., for 100 lb. w.p.

Several Dunbars & Rustons STEAM NAVVIES.

Gwynnes and other PUMPS.

Sissons & White Patent STEAM PILE DRIVERS,
and a large assortment of various other plant all to be sold at very low
prices.	______________________

APPLY—

GEORGE COHEN, SONS & CO.,

6oo, Commercial Road, Stepney, E.

NO CORROSION

WHERE IRONWORK

IS COATED

WITH

Write for

Latest Booklet “L” to
Sole Manufacturers—

>/ WAILES, DOVE & Co. Ltd.,
Newcastle-on-Tyne.

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

livery Office on the Telephone. Telegrams—“ BITUMASTIC

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality -

GOAL SCREENING & CONVEYING

Bi*

...... ,







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, 16, Fields Road, Newport, Mon

WORK IN
BRITAIN
COLONIES.

Brussels Exhibition : " Grand Prix:”

Roubaix Exhibition, 1911: “Grand Prix.”

COAL, COKE & ORE BRIQUETTING

and CEMENT MAKING PLANT,

BRICK & TILE

5

GRINDING MILLS

s

^siMPLrwcwceiif/icT^1

GROUND AND PREPARED TO A VARYING FINENESS
IN ONE SPECIAL MACHINE ONLY.	«

WM. JOHNSON & SONS,(LEEDS) LTD.? Arm ley, Leeds.

ECONOMICAL DRYING PLANT,
CRUSHING, GRINDING &
SCREENING PLANT,
GENERAL ENGINEERING.

“RDS” STEAM TRAP

PATENT

SuitaJble 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.

H OPKINS ON

JLI

B

Bl

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

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.

Dosei’lptio,-,.

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 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, 4th Edition, 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 & GO. LD

HUDDERSFIELD.

No. 275.