Manual free-access vending machine

Details Manual free-access vending machine Manual free-access vending machine

1987-06-19

1988-12-13

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

221 6, 221 17, 340542, 340585, G08B 2100, G08B 1318

Patent

active

047914114

ABSTRACT:
The status corresponding to the presence or absence of articles at their reserved locations is detected by means of an optical switch comprising an emitter which sends infra-red rays toward a receiver. The article obstructs these rays and hence its presence is detected. The information obtained from the optical switches is processed and used for servicing or billing.

REFERENCES:
patent: 3828340 (1974-08-01), Bauer, Jr. et al.
patent: 3905530 (1975-09-01), Emmel
patent: 4566285 (1986-01-01), Tershak et al.
patent: 4629090 (1986-12-01), Harris et al.

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