Detent UHF tuner with preset memory

Details Detent UHF tuner with preset memory Detent UHF tuner with preset memory

1974-08-26

1976-08-03

Scott, Samuel

Machine element or mechanism

Shaft operators

Preselected position

74 1054, 74 108, 334 51, F16H 3518

Patent

active

039722406

ABSTRACT:
A detent type tuning mechanism for a UHF tuner having a continuously variable tuning shaft includes a detented selector shaft, a gear train interconnecting the tuning shaft and the selector shaft, and a memory type fine tuning mechanism including a rotatable turret having mounted thereon a plurality of cams each engageable by a fine tuning shaft when the selector shaft is positioned in predetermined ones of the detent positions. A Geneva mechanism is employed to rotate the turret a predetermined increment to bring a different one of the cams into engagement with the fine tuning shaft when the selector shaft is rotated a predetermined number of detent positions. Each cam thereby serves as a memory fine tuning member for a predetermined group of adjacent UHF channels corresponding to a like number of detent positions of the selector shaft. An indicator dial provides a numerical display of the precise UHF channel selected at each position of the detented selector shaft.

REFERENCES:
patent: 3248953 (1966-05-01), Hulper et al.
patent: 3415127 (1968-12-01), Miner et al.
patent: 3415128 (1968-12-01), Smart
patent: 3697904 (1972-10-01), Mohri et al.
patent: 3777576 (1973-12-01), Miner

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