Optoelectric coin edge testing device

Details Optoelectric coin edge testing device Optoelectric coin edge testing device

Filed on

1977-12-01

Date issued

1979-10-23

Examiner

Grimm, Siegfried H.

Patent Class

Radiant energy

SubClass

Photocells; circuits and apparatus

SubSubClass

Optical or pre-photocell system

Other Related Categories

194 97A, 250206, 250224, G06K 714, G07D 500, G07F 302

Type

Patent

Status

active

Patent number

041722221

Description

ABSTRACT:
A coin testing device for discriminating between an acceptable coin and an unacceptable coin of similar diameter but having a different edge characteristic. The device comprises a coin passageway defining a path along which coins pass through the device. A light source positioned to throw light on the edge of a coin as it passes along the coin passageway and a light sensor is positioned to receive light reflected from the edge of an acceptable coin as it moves along the coin passageway. Means are provided for examining a time-dependent quality of the reflected light received by the sensor such as the duration or the number of pulses and for comparing the value of the quality with the value for an acceptable coin.

REFERENCES:
patent: 3586864 (1971-06-01), Brany et al.
patent: 3921003 (1975-11-01), Greene
patent: 3978962 (1976-09-01), Gregory, Jr.

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