Check-actuated control mechanisms – Including noncontacting – relatively movable parts connected...
Patent
1977-03-22
1978-08-22
Rolla, Joseph J.
Check-actuated control mechanisms
Including noncontacting, relatively movable parts connected...
194100A, G07F 302
Patent
active
041082966
ABSTRACT:
A coin receiving apparatus for a vending machine capable of accurately checking a coin diameter as well as other coin characteristics such as material and a surface pattern for discriminating a true coin from a false one and receiving the former and rejecting the latter. The diameter and other coin characteristics are detected by examining peak values of output waveshapes of coin detectors by means of a window circuit. A single window circuit is provided for each denomination and upper and lower limit values of the window circuit are automatically changed in accordance with a coin characteristic under examination. Frequencies of excitation signals of the various coin detectors are also automatically changed. If a plurality of coins are successively inserted in the coin receiving apparatus without a sufficient time interval, discrimination of the inserted coins is inhibited and the inserted coins are returned.
REFERENCES:
patent: 3869663 (1975-03-01), Tschierse
patent: 3901368 (1975-08-01), Klinger
patent: 3933232 (1976-01-01), Searle et al.
Hayashi Yukichi
Nishioka Tatsujiro
Sugimoto Osamu
Takizawa Masayoshi
Tamura Masayuki
Nippon Coinco Co. Ltd.
Rolla Joseph J.
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