Pedestrian crosswalk switch

Details Pedestrian crosswalk switch Pedestrian crosswalk switch

1997-08-25

1998-06-16

Spyrou, Cassandra C.

Electricity: circuit makers and breakers

Multiple circuit control

Reciprocating contact

200520, 200 47, 200341, H01H 1300

Patent

active

057674655

ABSTRACT:
A pedestrian crosswalk switch (140) for registering force applied to a crosswalk button (172) is provided. The pedestrian crosswalk switch (140) includes a button housing (142), a crosswalk button assembly (143) including a compression spring (174), a button coupling assembly (176), and a microswitch assembly (178). The crosswalk button assembly (143) has a button shank (184) that protrudes through the compression spring (174) and into a button aperture (162) of the button housing (142). The button coupling assembly movably couples the crosswalk button (172) via the button shank (184). The microswitch assembly (178) has a movable trigger (196) and a compression spring (198) pivotally mounted to a microswitch (194) by a pivot pin (202). The microswitch assembly (178) is mounted to a flange (168) protruding from the button housing (142) such that the trigger (196) is in engaging alignment with the button coupling assembly (176). Depression of the crosswalk button forcibly moves the button coupling assembly (176) into engaging contact with the trigger (196), creating input for the microswitch, which notifies traffic control apparatus (not shown) that a change in the crosswalk signal is requested. The provided pedestrian crosswalk switch provides an efficient and low-cost design, meeting existing guidelines for crosswalk switch functionality, while reducing disadvantages inherent in existing pedestrian crosswalk switches.

REFERENCES:
patent: 2707213 (1955-04-01), Koertge et al
patent: 3576529 (1971-04-01), Garrison
patent: 4295017 (1981-10-01), Kashima et al.
patent: 4454397 (1984-06-01), Kim
patent: 4871890 (1989-10-01), Herrera
patent: 5077454 (1991-12-01), Lorenzo
patent: 5495081 (1996-02-01), Ipcinski

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