Automatical signalling apparatus

Details Automatical signalling apparatus Automatical signalling apparatus

1977-01-27

1978-12-12

Buczinski, S. C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325116, G01S 956

Patent

active

041298691

ABSTRACT:
An apparatus for receiving a repetitive radar pulse wave signal, generating an ON-OFF signal upon reception of the radar pulse wave signal, and applying the ON-OFF signal to a speaker or a display lamp to indicate the reception of the radar pulse wave.

REFERENCES:
patent: 2800651 (1957-07-01), Marshall
patent: 2907999 (1959-10-01), Wadley
patent: 3047857 (1962-07-01), Rockett et al.
patent: 3391404 (1968-07-01), Vogelman
patent: 3546695 (1970-12-01), Freedman
patent: 3931622 (1976-01-01), Freedman
patent: 3967202 (1976-06-01), Batz
Radio Amateur's Handbook, 50th Edition, 1973, AU 222, p. 82.

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