Solid state seed sensor

Details Solid state seed sensor Solid state seed sensor

1974-09-05

1976-08-10

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250227, G01D 2104

Patent

active

039743772

ABSTRACT:
The embodiment of the invention disclosed herein is directed to a solid state seed sensor which includes a light-emitting diode for directing a quantity of light to a pair of photoresponsive transistors. The light-emitting diode and photoresponsive transistors are maintained within a housing structure wherein all electronic components are mounted, such housing structure being formed of two halves with interconnection between circuit portions being accomplished through sealed passages formed through the housing halves. The light-emitting diode and associated resistor are maintained in one housing half while the remaining electronic circuitry, including the photoresponsive transistors, are maintained in the other housing half.

REFERENCES:
patent: 3432676 (1969-03-01), Lindberg
patent: 3452209 (1969-06-01), Melkonjan
patent: 3537091 (1970-10-01), Schenkenberg
patent: 3714444 (1973-01-01), Carr et al.
"Improved Fiber Optic Read Head," Sokolski - IBM Tech. Journ. vol. 8, No. 11, Apr. 66, p. 1580.

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