Classifying – separating – and assorting solids – Adhesion – Coated surface or mass
Patent
1975-02-18
1976-08-17
Reeves, Robert B.
Classifying, separating, and assorting solids
Adhesion
Coated surface or mass
250555, 235 92SH, B07C 900
Patent
active
039752615
ABSTRACT:
An electrical system is disclosed, in which a conventional detector device produces a signal upon its sensing a characteristic or property of a conveyed object at a location upstream, on a conveyor system, from a control location at which the object is to be marked, sorted, segregated, removed, or otherwise acted upon because of said property having been detected. The signal is fed as input to an integrated circuit shift register, in binary form. The shift register is "clocked" by a signal derived either from the power line or other fixed frequency source or from a rotary pulse generator that senses the speed of the conveyor. The register output is connected to a relay amplifier circuit by means of which the original input signal, delayed by the time required to "clock" it through the shift register, is fed to an external sorting, marking or control device disposed at the mentioned, downstream control location.
An "end signal" suppression circuit is described which is used to create a "dead zone" on each side of the detector. This operates to suppress transient, spurious signals produced by the leading and trailing ends of the conveyed material. The positions of the respective dead zone boundaries are adjustable in small increments through the medium of a remote selector switch. The feed speed of the conveyor is sensed through the provision of a rotary pulse generator, which furnishes "clock" pulses to a memory incorporated in the suppression circuitry.
REFERENCES:
patent: 3380586 (1968-04-01), Frobese et al.
patent: 3432032 (1969-03-01), Curphey et al.
patent: 3432035 (1969-03-01), Adams
patent: 3445814 (1969-05-01), Spalti
patent: 3566090 (1971-02-01), Johnson
patent: 3669263 (1972-06-01), Babb
patent: 3720310 (1973-03-01), Lehmann
patent: 3802559 (1974-04-01), Luchetti
Reeves Robert B.
Rolla Joseph J.
Tac Technical Instrument Corporation
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