Coin slot structure for coin call telephone apparatus

Details Coin slot structure for coin call telephone apparatus Coin slot structure for coin call telephone apparatus

1989-04-26

1990-02-06

Schreyer, Stafford D.

Telephonic communications

With check operated control

Coin signalling or control

194229, 194345, 194322, H04M 1702, G07F 506

Patent

active

048993719

ABSTRACT:
A new coin slot structure for coin call telephone apparatus includes photodetectors set to identify the coins inserted therein, so as to allow three kinds of coins of different value be continuously inserted into the apparatus through the slot to extend the connection time, wherein the additional coins inserted will be automatically returned.

REFERENCES:
patent: 3488444 (1970-01-01), Porsner

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