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US3400345A Expired / Lapsed US ⏱️ 0.0 years remaining

Tuning selection system for uhf and vhf television bands

Assignee: IMP RUNDFUNK und FERNSEEWERK G
•
Filing: 1964-11-24
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Granted: 1968-09-03
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Expires: 1984-11-24
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Abstract

No abstract record available.

Inventors

  • 👤 Oloff Edwin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 07:12
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/06; H03J1/14

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 203 words
A TUNING SELECTOR SYSTEM FOR UHF AND VHF TELEVISION BANDS ADAPTABLE FOR CONNECTION WITH AN INPUT TRANSISTOR, SAID TUNING SELECTOR SYSTEM COMPRISING, A UHF CIRCUIT HAVING A VARIABLE CAPACITOR IN SERIES WITH A FIRST INDUCTOR COIL ADAPTED TO BE FIXEDLY CONNECTED ACROSS THE BASE TO COLLECTOR OF SAID INPUT TRANSISTOR, A COIL SELECTOR CIRCUIT HAVING PLURALITY OF ADDITIONAL COILS EACH OF WHICH CORRESPONDS TO A PARTICULAR FREQUENCY RANGE IN THE VHF BAND, AND SWITCHING MEANS FOR SELECTIVEY CONNECTING ONE OF SAID ADDITIONAL COILS IN PARALLEL WITH SAID UHF TUNING CIRCUIT TO PROVIDE A TANK TUNING CIRCUIT FOR EACH OF SAID CORRESPONDING FREQUENCY RANGES IN THE VHF BAND, SAID COIL SELECTOR CIRCUIT COMPRISING A SECOND INDUCTOR COIL, AND A THIRD INDUCTOR COIL HAVING ONE OF ITS ENDS CONNECTED TO ONE END OF SAID SECOND INDUCTOR COIL, AND DRIVE MEANS FOR ACTUATING SAID INDUCTOR SWITCHING MEANS, SAID VARIABLE CAPACITOR BEING OF THE AIR-DIELECTRIC ROTARY PLATE TYPE, SAID DRIVE MEANS COMPRISING A FLYWHEEL DRIVE INCLUDING A GEAR TRANSMISSION SYSTEM, SAID GEAR TRANSMISSION SYSTEM HAVING A DRIVING GEAR, A FIRST GEAR COUPLED TO SAID DRIVING GEAR FOR ROTATING SAID VARIABLE PLATE CAPACITOR, AND A SECOND GEAR COUPLED TO SAID DRIVING GEAR FOR DRIVING SAID INDUCTOR SWITCHING MEANS.
Claim 2
Dependent Claim 203 words
A TUNING SELECTOR SYSTEM FOR UHF AND VHF TELEVISION BANDS ADAPTABLE FOR CONNECTION WITH AN INPUT TRANSISTOR, SAID TUNING SELECTOR SYSTEM COMPRISING, A UHF CIRCUIT HAVING A VARIABLE CAPACITOR IN SERIES WITH A FIRST INDUCTOR COIL ADAPTED TO BE FIXEDLY CONNECTED ACROSS THE BASE TO COLLECTOR OF SAID INPUT TRANSISTOR, A COIL SELECTOR CIRCUIT HAVING PLURALITY OF ADDITIONAL COILS EACH OF WHICH CORRESPONDS TO A PARTICULAR FREQUENCY RANGE IN THE VHF BAND, AND SWITCHING MEANS FOR SELECTIVEY CONNECTING ONE OF SAID ADDITIONAL COILS IN PARALLEL WITH SAID UHF TUNING CIRCUIT TO PROVIDE A TANK TUNING CIRCUIT FOR EACH OF SAID CORRESPONDING FREQUENCY RANGES IN THE VHF BAND, SAID COIL SELECTOR CIRCUIT COMPRISING A SECOND INDUCTOR COIL, AND A THIRD INDUCTOR COIL HAVING ONE OF ITS ENDS CONNECTED TO ONE END OF SAID SECOND INDUCTOR COIL, AND DRIVE MEANS FOR ACTUATING SAID INDUCTOR SWITCHING MEANS, SAID VARIABLE CAPACITOR BEING OF THE AIR-DIELECTRIC ROTARY PLATE TYPE, SAID DRIVE MEANS COMPRISING A FLYWHEEL DRIVE INCLUDING A GEAR TRANSMISSION SYSTEM, SAID GEAR TRANSMISSION SYSTEM HAVING A DRIVING GEAR, A FIRST GEAR COUPLED TO SAID DRIVING GEAR FOR ROTATING SAID VARIABLE PLATE CAPACITOR, AND A SECOND GEAR COUPLED TO SAID DRIVING GEAR FOR DRIVING SAID INDUCTOR SWITCHING MEANS.

References Cited (Backward Citations)

GB502178A Cited
DE712261C Cited
NL57804C Cited
US2997582A Cited
US3275958A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1971-09-03 1972-03-04 1972-09-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1975-09-03 1976-03-04 1976-09-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1979-09-03 1980-03-04 1980-09-03 $7700.00 Window Closed / Lapsed

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