574

[supplement page X.]

THE COLLIERY GUARDIAN.

September 13, 1918.

Lost Power Recovered

and

1 5°/o Coal Saving Effected

by

Allen ‘Piston Pings

We have the testimony of users to confirm the accuracy of the above statement.
If you want proof we will furnish it upon receipt of your request. In fact, we
want the opportunity to furnish you with the experience of others ; therefore
solicit your enquiry. May we have it ?

ALLEN

FRICTIONLESS

ROD

PACKINGS

GIVE EQUALLY
SATISFACTORY
RESULTS.

ALLEN & SIMMONDS, LTD. X°EN READING

SUPREME

For Pistons and Piston Valves
of all types of Reciprocating
Engines, Pumps, Air Com-
pressors, Turbine Control
Valves, and Internal Com-
bustion Engines, etc.

give perfect security against loss of power, because they are practically
friction-free, and through their unrestrained and unrestricted action make

absolutely continuous steam-tight contact with the cylinder wall with the
lightest rubbing surface. In addition to saving 15% of the coal bill,
ALLEN rings reduce wear and tear to the lowest point.

GOODALL, CLAYTON & Co. Lo

Electric Signalling Bare Wires

LEEDS.

Telegrams :—
“Vertical, Leeds.”

Telephone:—20284-5 Leeds.

MAKERS AND ERECTORS OF

SCREENING PLANTS, PICKING BELTS, SCREENS,
PITHEAD GEARS.

BUNKERS, ROOFS, STEEL STRUCTURAL WORK, &c.

GAS RETORT INSTALLATIONS, CONVEYING PLANTS.

DAVIS’S
SPECIAL
BELLS.

TREMULOUS
OR
SINGLE

STROKE.

Patent.



With these
BELLS
there is
NO
POSSIBILITY
of a
SPARK.

Suitable for
A.C. or D.C.

Davis’s Relays with SPECIAL WINDING,
overcoming sparking on the line and in the Relay.

Davis=Fryar Mechano=Electric Signalling.

Patent.

A

The Davis-Fryar System dispenses entirely with bare wires and is in
successful operation throughout the country.

SEND FOR I-1 ST 41 HOS



Representatives:—H. L. CHESTON, Pepper Road, Hunslet, Leeds.

W. OGDEN DAYSON, 31, Bryn Road, Swansea.

JOHN DAVIS & SON (DERBY) LTD.,
ALL SAINTS WORKS, DERBY, &	^w. t