Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1981-09-14
1983-10-04
Bookbinder, Marc E.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
160201, 312 71, 312297, 334 85, 358254, 455176, 455347, H04B 108
Patent
active
044083467
ABSTRACT:
A key assembly for receiving devices employed in communication engineering, particularly for broadcasting and television receivers, comprises a casing provided with mutually releasable keys in the form of press buttons adapted to switch on storable, selectively adjustable electrical values supplied by channel memories including a plurality of voltage dividers for capacitance diode tuning and including, in association with the individual press buttons, rotatable and slidable knobs for channel tuning and, if desired, for selecting a given frequency range, said frequency range being adjustable by rotating the depressible and rotatable knob into any of a plurality of detented angular positions, with said depressible and rotatable knob being in a position, preferably a depressed position, different from the tuning position. Said depressible and rotatable knobs (5) are disposed in a recess (6) of said casing (3, 18) and are covered by a cover member (7; 8; 9; 34) which is slidably guided in a longitudinal direction in said casing.
REFERENCES:
patent: 3110533 (1963-11-01), Le Bron
patent: 3522542 (1970-08-01), Labude et al.
patent: 4217012 (1980-08-01), Klaus
German--DE periodical "Funkschau", 1968, No. 10, p. 306.
Bookbinder Marc E.
Preh Elektrofeinmechanische Werke Jakob Preh
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