US3699451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna selection and impedance matching apparatus
Assignee: Individual
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Filing: 1968-11-08
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Granted: 1972-10-17
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Expires: 1988-11-08
Abstract
Abstract On a frame having three cranks independently adjustable by rotation, there are slidably mounted tuning members each having three setting plates corresponding to the three cranks and capable of being locked and released by a single pushbutton operation. Furthermore, there are provided a switch for switching in selectively one of a plurality of antennae, a variable element for the impedance matching of an antenna circuit including a feeder, a switch for switching in selectively one of a plurality of converters, and a variable element for the tuning of a particular converter, all of which are arranged to be moved with their respective cranks. As a result, antenna switching and band switching and frequency selection can be effected simultaneously by a single operation.
Inventors
- 👤 Tamaki Ohaski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:59
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/06; H03J1/08; H03J5/00; H03J5/02; H03J5/04; H03J5/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
192 words
Apparatus for use in selectively coupling one of a plurality of antennas to a signal receiving circuit via one of a plurality of selectively operable converters, each converter being adjustable to a particular broadcast frequency, said apparatus comprising first switch means for selectively coupling one of said antennas to said converters, second switch means for selectively coupling one of said converters to the selected antenna and the signal receiving circuit, a variable impedor connected in series with the first switch means for matching the impedance of the selected antenna to that of the selected converter, third means for coupling the variable impedor and the second switch means for simultaneous operation to provide impedance matching for the selected converter, fourth means for adjusting each converter to a particular broadcast frequency, tuning means selectively connectable with said first, second and fourth means to individually pre-set the same for the particular broadcast frequency and correlate a selected antenna and a selected associated converter while adjusting said converter to a pre-determined value, and pushbutton means for operating said first, second and fourth means after the latter have been pre-set by the tuning means and disconnected therefrom.
Claim 2
Dependent Claim
192 words
Apparatus for use in selectively coupling one of a plurality of antennas to a signal receiving circuit via one of a plurality of selectively operable converters, each converter being adjustable to a particular broadcast frequency, said apparatus comprising first switch means for selectively coupling one of said antennas to said converters, second switch means for selectively coupling one of said converters to the selected antenna and the signal receiving circuit, a variable impedor connected in series with the first switch means for matching the impedance of the selected antenna to that of the selected converter, third means for coupling the variable impedor and the second switch means for simultaneous operation to provide impedance matching for the selected converter, fourth means for adjusting each converter to a particular broadcast frequency, tuning means selectively connectable with said first, second and fourth means to individually pre-set the same for the particular broadcast frequency and correlate a selected antenna and a selected associated converter while adjusting said converter to a pre-determined value, and pushbutton means for operating said first, second and fourth means after the latter have been pre-set by the tuning means and disconnected therefrom.
Claim 3
Dependent Claim
152 words
A pushbutton type tuner in combination with a circuit including a plurality of antennas, a plurality of converters, a first switch connected between said antennas and said converters for selecting one of said antennas for connection with the converters, a variable impedor connected in series with the switch for impedance matching with the converters, a single IF circuit, a second switch connected between the converters and the IF circuit for connecting a selected converter to said circuit, said tuner comprising a first crank connected to said first switch, a second crank connected to both the variable impedor and the second switch, independent rotating adjustment mechanisms respectively coupled to said cranks to pre-set the positiOns thereof to a selected antenna and converter for a particular broadcast frequency, and a tuning means for memorizing the pre-set positions of the cranks and for reproducing same to bring the switches and impeder to said pre-set positions.
Claim 4
Dependent Claim
152 words
A pushbutton type tuner in combination with a circuit including a plurality of antennas, a plurality of converters, a first switch connected between said antennas and said converters for selecting one of said antennas for connection with the converters, a variable impedor connected in series with the switch for impedance matching with the converters, a single IF circuit, a second switch connected between the converters and the IF circuit for connecting a selected converter to said circuit, said tuner comprising a first crank connected to said first switch, a second crank connected to both the variable impedor and the second switch, independent rotating adjustment mechanisms respectively coupled to said cranks to pre-set the positiOns thereof to a selected antenna and converter for a particular broadcast frequency, and a tuning means for memorizing the pre-set positions of the cranks and for reproducing same to bring the switches and impeder to said pre-set positions.
Claim 5
Dependent Claim
66 words
A pushbutton type tuner as claimed in claim 2 comprising a third crank and independent rotating adjustment mechanism coupled thereto to pre-set the position of the third crank, each of the converters including a variable impedor, said tuning means being coupled to the third crank to memorize the pre-set position thereof and to reproduce the same to bring the rotating adjustment mechanism to said pre-determined position.
Claim 6
Dependent Claim
51 words
A pushbutton type tuner as claimed in claim 3, comprising a pushbutton to operate said cranks, said tuning means including three setting plates for memorizing rotation angles of the three cranks, means to lock these plates when the pushbutton is pushed and to release the plates when the pushbutton is pulled.
Claim 7
Dependent Claim
33 words
A pushbutton apparatus as claimed in claim 4 wherein said tuning means comprises three members the first member being provided with two setting plates and the second member being provided with the pushbutton.
Claim 8
Dependent Claim
53 words
A pushbutton apparatus as claimed in claim 5 wherein the third member is mounted between the first and second members, and is arranged so that when the pushbutton is pushed or pulled either the setting plate on the first member or the setting plate on the second member may be locked or unlocked.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |