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US 3,973,229 AGranted
Combined 82-position UHF and VHF television tuner with memory fine tuning
AssigneeSarkes Tarzian, Inc.
InventorMorton L. Weigel
Life of this patent
Estimating the term…
Abstract
A combination UHF and VHF television tuner having a single detented selector shaft for individually selecting each one of the 82 UHF and VHF television channels and a single fine tuning shaft for providing memory fine tuning of channels in both the UHF and VHF bands. A single digital type channel indicator is used for precisely displaying at a single location the channel number of the UHF or VHF channel selected by the common selector shaft.
Claims14
A combination tuner comprising:
- a first tuner tunable over a first predetermined frequency band;
- a second tuner tunable over a second predetermined frequency band;
- a selector shaft;
- and means coupling said selector shaft to said first and second tuners, said coupling means including means for operatively coupling said selector shaft to said first tuner over a predetermined range of rotation of said selector shaft for tuning said first tuner over the entire first predetermined frequency band and for operatively coupling said selector shaft to said second tuner for a second predetermined range of rotation of said selector shaft for tuning said second tuner over said entire second predetermined frequency band, said coupling means including a first gear rotatable by said selector shaft, a second gear coupled to one of said tuners and engaging said first gear, means for disengaging said first and second gears and a third gear rotatable by said selector shaft, said third gear having means associated therewith for rendering said disengaging means operative to disengage said first and second gears only in a single predetermined position of said selector shaft, wherein said disengaging means includes an arm member affixed to one of said first and second gears and a retractable pin member affixed to the other one of said first and second gears, said third gear being operative to extend and retract said retractable pin.
1 more element
A combination UHF and VHF television tuning system comprising:
- a VHF television tuner having a detented tuning shaft, each detent of said VHF tuning shaft corresponding to a different one of each of the television channels in the VHF television band;
- a UHF television tuner having a continuously variable tuning shaft, rotation of said tuning shaft being effective to tune said UHF tuner over the entire UHF television band;
- a single selector shaft coupled to said UHF and VHF television tuners, rotation of said selector shaft being effective sequentially to tune said television tuners to all of the UHF and VHF television channels in the UHF and VHF television bands, said selector shaft including detent means for rendering said selector shaft incrementally rotatable over a predetermined number of detent positions equal to the total number of television channels in the UHF and VHF television bands, each of said detent positions uniquely corresponding to one of said UHF and VHF channels;
- and
- means for providing at a single location a unique indication of the channel number corresponding to each detent position of said selector shaft.
2 more elements
Dependencies are inferred from the claim text.