Infrastructure : Signalling : STS Signals

Infrastructure

Relays

STS Signals have been manufacturing BR930 series relays since the 1960’s and have successfully supplied a wide variety of versions to railway operators throughout the world. Originally manufactured as Tyer G4, then as Field & Grant and now as STS Signals, there are over 100 relay designs currently being manufactured meeting the requirements of many railway operators.

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Key Tokens Instruments

Token apparatus was pioneered from 1870 onwards by Tyer and Company Ltd., the early tokens taking the form of discs or tablets. Key token apparatus was first introduced in 1912 and with the greatly increased flexibility together with economy the system was widely adopted on single line railways all over the world. It has long been accepted that the Key Token system provides the simplest and safest means of operating trains over a single line from one blockpost to another. STS currently manufacture the No.12 Key Token Instrument that is a multi-purpose unit, the basic design being common to all applications.

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Circuit Controllers

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Strength & Polarity Meters

The STS PL7600 Strength & Polarity Indicator has been specifically designed to check the strength and polarity of British Railways Board A.W.S. Track Inductors (both Electro and Permanent).

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