Access system for the disabled

Disabled people are each provided with a portable transmitter (1) for transmitting a coded signal (2) and buildings (3) or other locations operating the system are provided with a receiver (4) for detecting the coded signal and a sign (4) for indicating to users that the system is operated. All the...

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Bibliographic Details
Main Authors COLIN PETER HILLS, ROBERT ALAN DAVIES, MICHAEL EDWARD DAVIES
Format Patent
LanguageEnglish
Published 17.01.1996
Edition6
Subjects
ALARM SYSTEMS
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
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