Detection of lightning, storms and the like

Details Detection of lightning, storms and the like Detection of lightning, storms and the like

1989-04-17

1990-03-27

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

324 72, 73170R, G01W 100

Patent

active

049124595

ABSTRACT:
Detection of lightning, storms, or the like via sensing means connected between an external antenna and ground, plus alerting means including gate means and indicator means operatively connected to the sensing means. An unpowered cascaded emitter-follower arrangement of at least a Darlington pair of transistors triggers the gate means when lightning-induced or similar fluctuations in ambient electric field cause the sensing transistors to conduct. A pulse-stretcher between the sensing means and the gate means controls the duration of indication and includes a capacitor connected to discharge through a sensing transistor during conduction of the sensing means and to recharge through a gate transistor during actuation of the indicator means. Resistors between the antenna and ground and between the base and the emitter of the respective transistors in the sensing means preclude actuation by fluctuations characteristic of slower-acting phenomena.

REFERENCES:
patent: 3891919 (1975-06-01), Renninger
patent: 4823115 (1989-04-01), McCallie

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