Communications: radio wave antennas – Antennas – With housing or protective covering
Patent
1977-06-20
1980-02-05
Lieberman, Eli
Communications: radio wave antennas
Antennas
With housing or protective covering
343895, 340572, G08B 1300, H01Q 136
Patent
active
041875095
ABSTRACT:
A wafer construction which includes an expansive, generally flat plastic member formed with a spiral groove in which an elongated electrical conductor is held in the shape of a coil. The plastic member is also formed with a recess in which a capacitor is contained. The capacitor is connected to both ends of the conductor to form a resonant electrical circuit. A hardened steel reinforcing element is also embedded in the wafer around the wafer circuits to protect them against severing. A tack-like fastener element has a concave head which telescopes over a dome-like projection on the wafer to provide a tamper resistant fastening assembly when the tack shank is inserted into an opening in the wafer.
REFERENCES:
patent: 1390342 (1921-09-01), Delay
patent: 2401472 (1946-06-01), Franklin
patent: 2916788 (1959-12-01), Carpinella
patent: 3628267 (1971-12-01), Minasy
patent: 3678608 (1972-07-01), Minasy
patent: 3754226 (1973-08-01), Fearon
patent: 3911534 (1975-10-01), Martens et al.
patent: 3914829 (1975-10-01), Paskert
patent: 3967161 (1976-06-01), Lichtblau
Knogo Corporation
Lieberman Eli
LandOfFree
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