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US4851836A - Audio-tactile pedestrian push button ...
https://patents.google.com/patent/US4851836A/en
An audio-tactile traffic signalling system provides combined audible and tactile signals to supplement the normal pedestrian light signals at controlled pedestrian crossings. Two types of...
WO1987006751A1 - Audio-tactile pedestrian push button ...
https://patents.google.com/patent/WO1987006751A1/en
an audio-tactile pedestrian push-button signalling system according to the present invention includes a housing, signal generator means having an …
Audio- tactile pedestrian detector (ATPD) by Alexandra …
https://prezi.com/tgjxcsfht4lh/audio-tactile-pedestrian-detector-atpd/
Audio- tactile pedestrian detector (ATPD) A push button system at traffic signals, which when pushed, provides pedestrians with audible signals to indicate when to cross and not to cross the road. The system produces 2 noises. The first a slow pulsing noise, which enables pedestrians to find the push button.
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