Stepping switch controlled traffic signal devices

Details Stepping switch controlled traffic signal devices Stepping switch controlled traffic signal devices

1977-07-15

1979-09-04

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

340373, G08G 100

Patent

active

041670019

ABSTRACT:
A plurality of horizontally extending rows of alternately green and red signal lights are provided in a signal display grid in each of two respective traffic signal devices. Each traffic signal device includes a STOP-GO indicator and a street indicator positioned respectively at the top and the bottom of the grid. To the left and right of the grid in each traffic device are respectively positioned red and green vertical strip indicators. Stepping switch control circuitry actuates the aforementioned lighting elements such that the red and green lighting elements in the horizontally extending rows are alternately successively actuated to provide a traffic signal display consisting of a block of lighting elements moving in a downward direction within the grid. The STOP indicator and the red left vertical strip indicator are continuously lit during a "red-light" condition; and the GO indicator and the right vertical strip are continuously lit during a "green-light" condition. A delay is provided in the sequencing of the block of red lighting elements in order to clear traffic through an intersection.

REFERENCES:
patent: 2101697 (1937-12-01), Watson
patent: 2480290 (1949-08-01), Fein
patent: 2588739 (1952-03-01), Main
patent: 2842627 (1958-07-01), Wagner
patent: 3200218 (1965-08-01), Wagner
patent: 3408623 (1968-10-01), Wagner
patent: 3970988 (1976-07-01), Gilmore

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