Detent UHF tuner with memory type independent fine tuning

Details Detent UHF tuner with memory type independent fine tuning Detent UHF tuner with memory type independent fine tuning

1976-04-21

1978-09-19

Wyche, Benjamin W.

Machine element or mechanism

Shaft operators

Preselected position

74 105, 74 106, 74 108, 74 1054, F16H 3518, H03J 102

Patent

active

041144597

ABSTRACT:
A detent type tuning mechanism for a UHF tuner having a continuously variable tuning shaft includes a detented selector shaft, and a fine tuning mechanism including a rotatable turret having mounted thereon a plurality of cams, each adjustable by a fine tuning shaft when the selector shaft is positioned in a predetermined position. A variable impedance element, operated by the fine tuning mechanism, is provided for fine tuning the tuner independently of the position of the selector shaft and the tuning shaft to permit a precise numerical display of the UHF channel selected in each position of the detented selector shaft.

REFERENCES:
patent: 3307414 (1967-03-01), Naber et al.
patent: 3415127 (1968-12-01), Miner et al.
patent: 3689853 (1972-09-01), Badger et al.
patent: 3697904 (1972-10-01), Mohri et al.
patent: 3706232 (1972-12-01), Robertson
patent: 3973229 (1976-08-01), Weigel
patent: 3990315 (1976-11-01), Weigel

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