January 21, 1916.

THE COLLIERY GUARDIAN

115

Hand-Driven Fans

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

1

for intermittent work. Made in 3 sizes.

Sirocco Engineering Works,

BELFAST.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality-

COAL SCREENING > CONVEYING

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1 %



SECTIOS OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

CONSIDERABLY OVER

inn pi antq -at ~

|UU I LHI1 I Q AND THE COLONIES

Estimates and Designs on application.

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

SUTCLIFFE’S

COAL CUTTERS

DISC & CHAIN TYPES, „h.=„
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, which are moved
freely from the face to admit ripping in the gateway.

MS 111 IHy Gearj to keep a constant supply of tubs
between the engine plane and coal face with instantaneous
extension of endless rope.

Wil* 6 BeltHiy^ for conveyors of all kinds.

Thomson’s Non-Overwind,

simplest, safest, surest, and cheapest.

Sutcliffe’s Universal Sounding

& Displaying Signalling

ApparatUS, 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.



“RDS” Steam Trap

PATENT

Suitable fox* 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.

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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 W ater 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
begiils 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.

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, Beducing Valves, Steam Traps, &c., &c.

FULL PARTICULARS FROM

RICHARD SUTCLIFFE.

Universal Works, HORBURY, WAKEFIELD, England,

J. HOPKINSON & CO. LD„

HUDDERSFIELD.

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