US3767112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency presetting equipment
Assignee: Panasonic Holdings Corp
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Filing: 1971-08-27
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Granted: 1973-10-23
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Expires: 1991-08-27
Abstract
Abstract Frequency presetting equipment adapted for a tuner device including n(n>l) tuning circuits each having plural tuning diodes. The apparatus comprises m(m>n) potentiometers in parallel connection one end of which is to be connected to a first power source, a first rotary switch having m stationary contacts connected to m movable terminals of said m potentiometers and having a rotary terminal connected to said plural tuning diodes. Also included are band selection means consisting of at least one parallel connection of m switches each of which has n contact segments coupled to said n tuning circuits and one common terminal. At least one additional rotary switch having m stationary contacts is connected to said m common terminals of said m switches and has a rotary terminal and a single rotary knob is provided for rotating said first rotary switch and said at least one additional rotary switch at the same time whereby said m switches respond to said m potentiometers, respectively.
Inventors
- 👤 H Tonari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:38
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/06; H03J1/066; H03J5/00; H03J5/02; H03J5/0218
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
Frequency presetting apparatus adapted for a tuner device including n(n>1) tuning circuits, each having plural tuning diodes, which comprises: m (m>n) potentiometers connected in parallel and having one side adapted to be connected to a first power source; a first rotary switch having m stationary cOntacts connected to m movable terminals of said m potentiometers and having a rotary terminal adapted to be connected to said tuning diodes; band selection means comprising at least one parallel connection of m switches, each switch having n contact segments coupled to said n tuning circuits and one common terminal for selectively contacting one of said n contact segments; at least one additional rotary switch having m stationary contacts connected to said m common terminals of said m switches and having at least one rotary terminal; and a single rotating means for rotating said first rotary switch and said at least one additional switch at the same time, whereby said m switches correspond to said m potentiometers, respectively.
Claim 2
Dependent Claim
164 words
Frequency presetting apparatus adapted for a tuner device including n(n>1) tuning circuits, each having plural tuning diodes, which comprises: m (m>n) potentiometers connected in parallel and having one side adapted to be connected to a first power source; a first rotary switch having m stationary cOntacts connected to m movable terminals of said m potentiometers and having a rotary terminal adapted to be connected to said tuning diodes; band selection means comprising at least one parallel connection of m switches, each switch having n contact segments coupled to said n tuning circuits and one common terminal for selectively contacting one of said n contact segments; at least one additional rotary switch having m stationary contacts connected to said m common terminals of said m switches and having at least one rotary terminal; and a single rotating means for rotating said first rotary switch and said at least one additional switch at the same time, whereby said m switches correspond to said m potentiometers, respectively.
Claim 3
Dependent Claim
49 words
A frequency presetting apparatus as claimed in claim 1 wherein l (m>l>1) common terminals of said m switches fix l predetermined tuning circuits with l stationary contacts of said additional rotary switch, while each (m-l) common terminal of said m switches selectively contacts one of said n contact segments.
Claim 4
Dependent Claim
51 words
Frequency presetting apparatus as claimed in claim 1 wherein n output terminals of said n tuning circuits are connected in parallel to said n contact segments of said m switches and said at least one rotary terminal of said additional rotary switch is adapted to be connected to a following stage.
Claim 5
Dependent Claim
52 words
Frequency presetting apparatus as claimed in claim 1 wherein n input terminals of said n tuning circuits are connected in parallel to said n contact segments of said m switches and said at least one rotary terminal of said additional rotary switch is adapted to be connected to a second power source.
Claim 6
Dependent Claim
44 words
Frequency presetting apparatus as claimed in claim 1 wherein said m potentiometers, said first and said additional rotary switches and at least one parallel connection of m switches are formed in a single unit on an insulating base equipped with conductive and resistance film.
Claim 7
Dependent Claim
79 words
Frequency presetting apparatus as claimed in claim 5 wherein each of said rotary terminals has a rotary conductive track and a rotary contact, said rotary conductive track and said stationary contacts being arranged concentric to the rotating axis of said rotating means and being provided on one surface of said insulating base, said rotary contacts being supported by said rotating means and contacting each rotary contact with both said rotary conductive tracks and one of said m stationary contacts.
Claim 8
Dependent Claim
41 words
Frequency presetting apparatus as claimed in claim 5 wherein said potentiometers are separated from said first and additional rotary switches and at least one parallel connection of m switches by a barrier to prevent contact grease from expanding to said potentiometers.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |