May 12, 1916.

THE COLLIERY GUARDIAN.

893

THERE IS A

CENTRIFUGAL FAN

for every purpose for which a

: Fan can be used. :	:

Fans for Dust Removal.

These Fans can deal with Dust of every
description. Write foi Bulletin No. 2009.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENING > CONVEYING

H.; ■

$

__ -

i«r.

...................... .

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER,





Davidson & Co. Ltd.,

Sirocco Engineering Works,

BELFAST.

CONSIDERABLY OVEE
100 PLANTS H
Estimates and Designs on application.

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

W0KK IN
BRITAIN
COLONIES.

---------- SUTCLIFFE’S ------------------

COAL CUTTERS,

DISC Sc CHAIN TYPES, light or heavy pattern, for thin or thick
seams, with shallow or deep cuts. Compressed Air or Electrical Drive.

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

Roadway Conveyors, which are moved freely from the face to admit
ripping in the gateway.

Hauling Gear, to keep a constant supply of tubs between the engine plane
and coal face with instantaneous extension of endless rope.

Wire Belting, for conveyors of all kinds.

Thomson’s Non-Overwind, simplest, safest, surest, and cheapest.

Sutcliffe's Universal Sounding and Displaying

Signalling Apparatus, fully complying with Regulation 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.

PRINCEPS PATENT

“DEFLECTOR” OIL SEPARATOR.

Capacity, 300,000 lbs. of
steam per hour,
60" diameter main.

ONE OF THE LARGEST
EXTRACTORS MADE IN THIS
COUNTRY.



PRINCEPS & CO.,
Engineers,
SHEFFIELD,

“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.

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

hilr

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 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 or 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. HOPKINSON & GO. LD.,

HUDDERSFIELD.

No. 342.