Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1977-05-06
1979-04-10
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
340539, 340674, G08B 2100
Patent
active
041491637
ABSTRACT:
A wireless seed detecting and monitoring apparatus includes one or more transmitter units mounted at the seed planter and a receiver unit mounted in a monitor console located at a remote location. Seeds being planted produce a signal which modulates an r-f transmitted signal during the planting operation. A receiver is responsive to the r-f transmitted signal and detects the modulated signal information corresponding to seeds being planted. This detected signal is then delivered to monitoring circuitry to indicate the operation of the seed planter.
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patent: 2683869 (1954-07-01), Norris et al.
patent: 3469198 (1969-09-01), Madsen
patent: 3517268 (1970-06-01), Webb
patent: 3723989 (1973-03-01), Fathauer et al.
patent: 3757315 (1973-09-01), Birchfield et al.
patent: 3782730 (1974-01-01), Horchler
Dickey-john Corporation
Swann III Glen R.
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