June 27, 1913

THE COLLIERY GUARDIAN.

1377

“The Pioneers and Largest Makers in the World of Electrically Lit Miners’ Lamps ’’

-SAFETY LAMPS

Buyers TSTote.

THE PRESTWICH PATENTED
PROTECTOR
MINERS’ LAMPS

HAVE
Passed Mil
Home Office Tests?

TOGETHER WITH OUR

Specially Toughened Glasses.

QUOTATIONS given for every description of Lamproom

Installations, Enamelled Iron Colliery Notice Plates, Etc.

WRITE FOR CATALOGUE

T PROTECTOR LAMP& LIGHTING “o,

ECCLES, Near MANCHESTER.

’Phone: No. 13 ECCLES.	Telegrams: "PROTECTOR, ECCLES.”

the Makers:

Buy from

CUTTER PICKS,
HOLLOW DRILL STEELS

AND

TWIST DRILL STEELS

READY FOR USE IN ALL

MAKES OF MACHINES.

THE HARDY PATENT PICK CO. L°

SHEFFIELD.

HAULAGES

AND

THREE-THROW PUMPS

TO DRIVE BY

Modern Mining

Efficiency is the keynote in most mines at the present
day. This means that production must be increased
to the maximum, and the cost of production be reduced
to the minimum.

To accomplish this, many points about the plant will
have to be considered, not the least important of which
is that of power transmission. A form of drive which
offers unequalled advantages is that of

Air, Steam or Electricity.

BRIQUETTE MACHINERY.

IRON * STEEL FORCINGS.

HAMMERED SHAFTS IN STOCK

up to 16 in. diameter.





THE

FT"’ '

A ’ -

Ask



USKSIDE ENGINEERING

CO. LTD.,
Newport, Mon.

The three main types of chains used in collieries are
the Silent, Roller, and Block.

The Silent Chain is used chiefly for main Haulage
Drives, Pumps, &c. Its greatest advantages are a
constant efficiency of 98 per cent., which is maintained
until the drive is worn out, and a high ratio of reduction
combined with the high speed at which it can be run.

The Roller Chain is an extremely valuable type for
Colliery work and one which is being extensively used
for driving Tipplers, Screens, Picking Belts, Inspection
Belts, Scraper Conveyors, Washing Plants, &c., &c.

It is a highly efficient form of drive, and one in
which there can be no slip—an important consideration
for screening purposes.

Another great advantage of the roller chain is that
it saves space owing to chains being so much narrower
than belts, sprocket wheels being so much smaller than
belt pulleys, and shorter centre distances being practicable.

Block Chains are mainly used in adapted forms as
Creeper, Haulage, Elevator and Conveyor Chains,
and for one hundred and one other purposes to which
they can be adapted.

Write for our 130-page illustrated book, “ Renold
Driving Chains and their Use; ” also pamphlet
ref. 1/64, “ Renold Driving Chains for Collieries.”
Free from Department 66 :

HANS RENOLD LTD., MANCHESTER.