December 24, 1915.

THE COLLIERY GUARDIAN.

1283

THERE IS A

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

CENTRIFUGAL FAN
for every purpose for which a
: : Fan can be used. :	:

Speciality—

COAL SCREENINGs CONVEYING

CUPOLA FANS.

Built in 8 standard sizes and
designed for melting half a ton
to twenty tons of metal per
hour with pressures from 12
to 30 in. w.g.

-------See Bulletin No. 2028. --------

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

Davidson & Co. Ltd.,

Sirocco Engineering Works,

BELFAST.

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.

SUTCLIFFE’S

COAL CUTTERS

DISC & CHAIN TYPES, or n™,
pattern, for thin or thick seams, with shallow or deep cuts.
Compressed Air or Electrical Drive.

Coal-Face Conveyors, unrivalled in
capacity, constant in work, noiseless in the face and most
easily moved forward.

Roadway Conveyors,

freely from the face to admit ripping in the gateway.

IHlOOll10^	to keep a constant supply of tubs

between the engine plane and coal face with instantaneous
extension of endless rope.

for conveyors of all kinds.

Thomson’s Non-Overwind,

simplest, safest, surest, arid cheapest.

Sutcliffe’s Universal Sounding
& Displaying Signalling
atUS, fully complying with Regula-
tion 95 of the MINES ACT.

NOTE.—The above machinery is all patented or protected and makers
or users of infringing articles will be liable to be prosecuted.

FULL PARTICULARS FROM

RICHARD SUTCLIFFE,

Universal Works, HORBURY, WAKEFIELD, England.

PATENT

“MAC” VALVE.

Figure 82OO-Inside Screw
Figure 8205— Outside Screw



Suitable for the
Highest Steam Pressures.

Fitted with
Hopkinton’s (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and valve are withdrawn,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 vaive body
from its fixed position.

and Seat is made of

The Renewable Valve

“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 p.-rts 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 SOO tons of Standard Steel Castings kept in stock.

We can give immediate delivery of iron and steel Falves.

Illustrated Catalogue Post Free on Application.

J. HOPKINSON & C« Ls Hudilersfielil,

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,
Oldham, Blackpool, Paris & Petrograd.

No. 342.	—.