Tuning indicator for a radio frequency receiver

Details Tuning indicator for a radio frequency receiver Tuning indicator for a radio frequency receiver

1973-10-26

1976-04-27

Griffin, Robert L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340324R, 340378R, 334 86, 1161244, 116124A, H04B 106, H03J 104

Patent

active

039538001

ABSTRACT:
A radio or television receiver is selectively tunable to one of a number of carrier frequencies transmitted from distant broadcast stations and has a tuning indicator for displaying the frequency of a selected station. The indicator includes a station frequency encoder, having a plurality of sets of indicia representative of a plurality of frequencies of the broadcast stations, arranged to move, as the receiver is tuned, between a light source and the proximal end of a fiber optic bundle. The distal end of the fiber optic bundle is arranged on a display panel to illuminate segments of seven-bar numerical configuration in the form of a squared figure eight. When the receiver is tuned to a station, the indicia, corresponding to the frequency of the station, are aligned with the proximal ends of the fiber optic bundle. Light from the light source is transmitted through the indicia, and the fibers of the fiber optic bundle aligned with the indicia, to the display panel where the bars of the numerical configuration are selectively illuminated to form digits representing the frequency of the station. To insure an accurate display of the station frequency, an alignment indicator actuates the light source only when the indicia are aligned with the fiber optic bundle.

REFERENCES:
patent: 3222666 (1965-12-01), Hallden
patent: 3555539 (1971-01-01), Richards
patent: 3639747 (1972-02-01), Schmidt
patent: 3701951 (1972-10-01), Krausser
patent: 3753119 (1973-08-01), Close
patent: 3820096 (1974-06-01), Himmelsbach
patent: 3836911 (1974-09-01), Gibson et al.

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