Machine element or mechanism – Shaft operators – Preselected position
Patent
1976-07-01
1978-11-21
Wyche, Benjamin W.
Machine element or mechanism
Shaft operators
Preselected position
334 51, 74 1015, 74 102, 74 106, F16H 3518
Patent
active
041260511
ABSTRACT:
This invention relates to a channel selector suitable for use in a television receiver set. The channel selector comprises a channel selecting shaft which is linked to a variable capacitor shaft through an Oldham coupler. A fine tuning shaft also is linked to the variable capacitor shaft through a coupler incorporating an incremental detent arrangement.
Selection of a channel is made by turning the channel selection shaft to move the variable capacitor shaft by a suitable angle (for instance, about 2.degree.). When the channel selection shaft is turned by such an amount, the coupler slips so as to allow the variable capacitor shaft to turn independently of the fine tuning means. Once a channel is selected, fine tuning is made by slightly turning (for instance, within 0.3.degree.) the fine tuning shaft to correspondingly rotate the shaft of the variable capacitor.
The channel selector also comprises means for memorizing the results of the fine adjustments for individual channels. The memory means includes several memory cams, each of which memorizes result of adjustment for several neighboring channels. By so designing the arrangement that each of the memory cams serves to memorize the fine tunings commonly for several channels, the memory means can be made compact and simple.
REFERENCES:
patent: RE26777 (1970-01-01), Fulton
patent: RE28632 (1975-11-01), Badger
patent: 941925 (1909-11-01), James
patent: 3148345 (1964-09-01), Moran
patent: 3205720 (1965-09-01), Smith
patent: 3248674 (1966-04-01), Fulton
patent: 3459055 (1969-08-01), Sperber
patent: 3474362 (1969-10-01), Harten
patent: 3760640 (1973-09-01), Mayer
patent: 3783698 (1974-01-01), Ogasawara
patent: 3972240 (1976-08-01), Valdettaro
patent: 3973229 (1976-08-01), Weigel
patent: 3990315 (1976-11-01), Weigel
Hayakawa Toshio
Mitsugi Itaru
Matsushita Electric - Industrial Co., Ltd.
Turner R. C.
Wyche Benjamin W.
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