Grain sensor

Details Grain sensor Grain sensor

1981-10-22

1984-04-03

Brigance, Gerald L.

Communications: electrical

Condition responsive indicating system

Specific condition

340609, 7386118, 7386173, 310327, G01F 105

Patent

active

044411014

ABSTRACT:
A seed flow detector for use with a seed tube, comprised of a pin for extending radially into the seed tube, the end of the pin being orthogonally fixed to one face of a piezoelectric crystal transducer. Flexible resilient material is disposed against the other face of the transducer so as to damp mechanical vibrations below a predetermined frequency. Substantially no build-up of seeds or blockage of the seed tube results, mechanical vibration is substantially damped, while signals resulting from the impact of seeds against the pin are reliably generated.

REFERENCES:
patent: 2561763 (1951-07-01), Waters et al.
patent: 2907015 (1959-09-01), Young
patent: 3557616 (1971-01-01), Landon, Jr et al.
patent: 3816773 (1974-06-01), Baldwin et al.
patent: 3969927 (1976-07-01), Yoshida et al.
patent: 4079362 (1978-03-01), Grimm et al.
patent: 4312235 (1982-01-01), Daigle
patent: 4351192 (1982-09-01), Toda et al.

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