May 8, 1914.

THE COLLIERY GUARDIAN.

1003

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality -

GOAL SCREENING & CONVEYING.

ft

<

i

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER,

HAULAGE

GEARS. ::

ARRON Company have one of the
best equipped Engineering estab-
lishments in the Country enabling
them to test the efficiency of their
Haulage Gears under working con-
ditions. . They place their experience and manu-
facturing resources at the disposal of the Coal
Mining Trade generally.



By Appointment
Ironfounders to
H.M. The King.

Illustration shows No. 520B Haulage Gear which has
afforded great satisfaction where installed. There are really
two Haulages, worked by a motor, common to both, through
spur gears. At any time, should it be desired, the Haulages
may be separated, and each worked independently by a slight
alteration, and of course a motor to drive each unit.

The Haulages are worked by means of a highly efficient
worm gear, absolutely silent in operation, the thrusts being
taken both for wheel and worm, on Hoffman's Double Ball
Thrusts.

A Cone Brake is applied to the worm spindle, which
comes into operation at the instant the clutch is disengaged.
The clutches, which run in oil baths, are of the well-known
coil clutch type. No woodwork is used in the construction
of these Haulages.

No. 27 E Haulage Gear Pamphlet
sent post free on application. . .

Q1RRON CoMP/INY eA^ONERIs!Gi DEiPT'’

CARRON, Stirlingshire.

CONSIDERABLY OVER

inn pi ant?

lUU I LpJI I O 4HD THE colon,es

Estimates and Designs on application.

Agent for South Wales: A. LEIGHTON STEVENS, 16, Fields Road, Newport, Mon.

Contractors’ Plant for Sale.

BRUSSELS EXHIBITION: "CbAND PRIX:” ROUBAIX EXHIBITION, 1911 : "GRAND PRIX.”

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, 11 in. cylinder, 18 in. 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

mi: jl_ii ji ji h j

JPATENT

“MAC”

VALVE.

Scx»e w

Figure

Figure

Suitable for the
Highest Steam Pressures.

Fitted with

flopkinson’su Platnam ”

Metal Renewable Valve
and Seat.

All parts interchangeable.

All joints made by metallic
contact, thereby obviating the
necessity of using jointing
material.

By removing the cover the seat
and valve are withdrawn,
enabling new parts to be in-
serted in about a minute’s
time, and without the neces-
sity—as with ordinary valves
—of removing the valve body
from its fixed position.

IS COATED

WITH



Write for

Latest Booklet “L” to
Sole Manufacturers—

X WAILES, DOVE & Co. Ltd.,
Newcastle-on-Tyne.

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

Every Office on the Telephone.	Telegrams—“ BITUMASTIC.”

8200—Inside

8205—Outside Scvcw

The Renewable Valve and Seat is made of

Hopkinson’s “Platnam” Metal

which is suitable for superheated steam and bad waters.

There are many valves with renewable valve and seat upon the market, but under modern
conditions and high pressures do not last any length of time owing to the deterioration which
takes place on the valve and seat, and consequently the renewing of the parts is a frequent
occurrence. We have tried our “Platnam” Metal under severe conditions, and. have every
confidence in recommending it to work under high temperatures. The “MAC” valve has
been designed to adopt this metal for the renewable valve and seat.

Upwards of 500 tons of Standard Steel Castings kept in stock.

We can give immediate delivery of iron and Steel Valves,

Write for Illustrated Specifications and Catalogue No. 66o, 4th edition, post free.

J. HOPKINSON & C° LD Huddersfield,

Makers of 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.

Depots & Showrooms—London, Glasgow, Edinburgh, Cardiff,
No. 275.Oldham, Blackpool, Paris & St. Petersburg.