Photocell pedestrian button

Details Photocell pedestrian button Photocell pedestrian button

2005-12-27

2005-12-27

Wu, Daniel (Department: 2632)

Communications: electrical

Traffic control indicator

Intersection normally under local controller

C340S944000, C340S929000, C340S407100, C340S384100, C004S623000, C004S628000, C004S643000

Reexamination Certificate

active

06980126

ABSTRACT:
A unit for pedestrian control of traffic lights operated by a traffic light controller, comprises a casing adapted to be mounted to a traffic light post, the casing having a bottom face carrying a window, and a photocell mounted in the casing for directing a beam through the window in a downward direction generally parallel to the post to which the casing is mounted. The photocell is responsive to the presence of a pedestrian's hand placed beneath the window in the beam. The photocell is adapted to be operatively connected to the traffic light controller to send a signal thereto when the presence of a pedestrian has been detected.

REFERENCES:
patent: 4187418 (1980-02-01), Harris
patent: 5125482 (1992-06-01), Negishi
patent: 5920050 (1999-07-01), Tolman
patent: 2004/0226962 (2004-11-01), Mazursky et al.

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