Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1981-10-14
1983-10-25
Martin, John C.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455617, 455127, 322 1, 310 25, H04B 900
Patent
active
044123558
ABSTRACT:
In the present invention, a novel magnetic circuit maximizes the electrical power generated upon manual actuation of a push-button switch while minimizing the required weight of the magnetic materials. In particular, the magnetic circuit of the power supply of the present invention includes the following magnetic materials: an unmagnetized core (comprising iron) around which a coil is wound, the coil being connected to supply power to the transmitter; a permanent magnet (comprising iron having a permanent magnetic moment) mounted on a vibrating reed, at least one pole of the permanent magnet facing at least one end of the core. Actuation of the push-button switch induces oscillatory motion of the reed and of the permanent magnet. An advantage of this novel magnetic circuit is that, in at least one embodiment, the oscillatory motion of the permanent magnet causes a complete flux reversal through the coil during each cycle of the mechanical oscillation of the reed, a significant advantage.
REFERENCES:
patent: 3480808 (1969-11-01), Rieth
Hummel Terry L.
Terbrack William H.
Bethurum W. J.
Coles Edward L.
Hughes Aircraft Company
Karambelas A. W.
Martin John C.
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