Article detection system and method

Details Article detection system and method Article detection system and method

1974-07-01

1976-06-15

Trafton, David L.

Communications: electrical

Systems

Call station

235 92PD, 250223R, 340259, G08B 1318

Patent

active

039640418

ABSTRACT:
A system and method for sensing and detecting articles such as container ends and for providing count and/or control outputs representative of the number of such articles detected. A sensing signal is impinged against the article to be sensed and a feedback signal representative thereof is generated. This feedback signal is connected to the input of a circuit which generates a fixed frequency signal for modulating the sensing signal at the fixed frequency. This circuit provides a first output signal in response to the presence at its input of a signal oscillating at the fixed frequency and a second output signal in the absence at its input of a signal oscillating at the fixed frequency. One of these output signals is indicative of the detection of an article and is applied to suitable counting and/or control circuitry which provides the desired count and/or control outputs.

REFERENCES:
patent: 2731621 (1956-01-01), Southeimer
patent: 2912683 (1959-11-01), Bagno
patent: 3534351 (1970-10-01), Harnden et al.
patent: 3605082 (1971-09-01), Matthews
patent: 3644912 (1972-02-01), Perlman
patent: 3842257 (1974-10-01), Kohler

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