August 27, 1915.

THE COLLIERY GUARDIAN

415

Trade

STANLEY

Mark.

The Largest Manufacturers of
SURVEYING & DRAWING INSTRUMENTS
in the World.

Our Drawing Instruments are made throughout in
our own factories, and if quality be considered are
cheaper than German ones.

Please send for our “ K.12 ” Catalogue, and compare
our prices with those of other first-class makers.

Also for particulars of Stanley’s London made
DRAWING PENCILS.

Stanley’s Waterproof Drawing
Inks. All colours. The result
of over 30 years’ experience. Price
9d. per 2.'oz. bottle.

W. F. STANLEY & CO. LTD.,

Head Offices and Showrooms,
286, High Holborn, LONDON, W.C.

ROPE
DRIVING.

FOR EFFICIENCY &
DURABILITY USE

r

Illustrated Lecture on—

‘ THE TRANSMISSION
OF POWER BY
ROPES.”

Post Free on Application.

DIPLOMAS OF HONOUR

BRUSSELS and TURIN.

A vf ’

B-;".
„ .

LONDON OFFICE:
95 & 97, Finsbury Pavement,
E.C.



Telegrams:

“ Kenyon, Dukinfield.”
Telephone:

494 Ashton.

Wm. KENYON & SONS Ltd.,

CHAPEL FIELD WORKS,
DUKINFIELD, near MANCHESTER.

The Life of Steelwork is Doubled
When it is Coated with

BITUMASTIC^ Solution

“ BITUMASTIC ” Solution effectively Prevents Corrosion, and
thus saves Costly Repairs and Renewals.

“ BITUMASTIC ” is a Brilliant Black Colour, Supplied Ready
for Use.

Greater Covering Capacity and Superior Lasting Qualities
than Ordinary Paint.

WRITE FOR ILLUSTRATED PAMPHLET TO SOLE MANUFACTURERS-

WAILE8 DOVE BITUMASTIC I™ Newcastle-on-Tyne,

And at London, Liverpool, Manchester, Glasgow, Cardiff, Birmingham, Leeds, &c.
’Phones in every office.	Telegrams—“Bitumastic.”

QUALITY m SWITCH GEAR.

® ..

LIQUID
SWITCH
GEAR
of
HIGH-
CLASS
MAKE
and
GOOD
DESIGN.

, I •

WRITE
for
LIST

No. 60
with

PRICES
and

OUTPUTS

J. H. HOLMES & GO., Newcastle-on-Tyne.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality-

COAL SCREENING « CONVEYING

. -

1/ - ■











SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

CONSIDERABLY OVER

100 PLANTS

NOW AT WORK IN
GREAT BRITAIN
AND THE COLONIES.

Estimates and Designs on application.

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

“RDS”

Steam

LATENT

Trap

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.

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

1
til

..i'iiflH

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~ "aw-'-.—	.	■

’ HOPKIN SON.

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 Q 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. 306.