Self-cancelling parking meter

Details Self-cancelling parking meter Self-cancelling parking meter

1975-10-08

1977-08-23

Witkowski, Stanley J.

Electricity: conductors and insulators

Feedthrough or bushing

Compression

174DIG21, 340 51, G07C 130, G08G 114

Patent

active

040431177

ABSTRACT:
Parking meter carries photosensor directed at the controlled parking space. The operator of a parked car energizes the meter by coin insertion and meter cranking and thus activates the photosensor. When the vehicle is moved out of the parking space, the photosensor detects the movement and resets the parking meter to zero.

REFERENCES:
patent: 2217776 (1940-10-01), Sweetland
patent: 2535472 (1950-12-01), Wood
patent: 2623933 (1952-12-01), Allstadt, Jr.
patent: 2821283 (1958-01-01), Cruse
patent: 2983097 (1961-05-01), Ewing
patent: 3064416 (1962-11-01), Armer
patent: 3535870 (1970-10-01), Mitchell
patent: 3568433 (1971-03-01), Van Horn et al.

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