GB1387382A - Vernier tuning means for a tuner - Google Patents
Vernier tuning means for a tunerInfo
- Publication number
- GB1387382A GB1387382A GB249873A GB249873A GB1387382A GB 1387382 A GB1387382 A GB 1387382A GB 249873 A GB249873 A GB 249873A GB 249873 A GB249873 A GB 249873A GB 1387382 A GB1387382 A GB 1387382A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rotor
- stator
- shaft
- electrodes
- slots
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
- H03J3/20—Continuous tuning of single resonant circuit by varying inductance only or capacitance only
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
1387382 Variable capacitors GENERAL INSTRUMENT CORP 17 Jan 1973 [29 Sept 1972] 2498/73 Heading H1M In a tuner comprising gauged variable capacitors each having stator electrodes 12 and rotor electrodes 16 mounted on shaft 14, fine tuning is accomplished by providing a further stator electrode 22 of small area (Fig. 4B), and, also mounted on shaft 14, a corresponding rotor electrode 24 divided into sections by radial slots 26 each section having about the same angular extent as stator 22 and being bendable out of the plane of the rotor to effect the fine tuning. Preferably the outer rotor electrodes of the main capacitors are also slotted for adjustment and for optimum results the latter slots are staggered in relation to slots 26. When for example about seventy television channels are required to be tuned, each section of the auxiliary rotor may cover about six channels. In an alternative construction (Fig. 7), the auxiliary stator 22<1> extends parallel to the axis of rotation and the rotor comprises a larger number of adjustable sections consisting of fingers extending from the periphery of a disc mounted on shaft 14.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29346572A | 1972-09-29 | 1972-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1387382A true GB1387382A (en) | 1975-03-19 |
Family
ID=23129196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB249873A Expired GB1387382A (en) | 1972-09-29 | 1973-01-17 | Vernier tuning means for a tuner |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3789331A (en) |
| JP (1) | JPS4976401A (en) |
| CA (1) | CA974616A (en) |
| DE (1) | DE2348978A1 (en) |
| GB (1) | GB1387382A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5420582Y2 (en) * | 1973-08-24 | 1979-07-25 | ||
| JPS5044254U (en) * | 1973-08-24 | 1975-05-06 | ||
| JPS5148643U (en) * | 1974-10-09 | 1976-04-12 | ||
| JPS5158801A (en) * | 1974-11-18 | 1976-05-22 | Sanyo Electric Co | Uhf chuunano bichoseisochi |
| GB2097128B (en) * | 1981-04-16 | 1984-12-12 | Medwin Albert H | Electrical vernier measuring apparatus |
| US9722569B1 (en) * | 2013-06-12 | 2017-08-01 | Christos Tsironis | Multi-band low frequency impedance tuner |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3292060A (en) * | 1966-12-13 | Variable capacitor | ||
| US1904165A (en) * | 1929-02-18 | 1933-04-18 | Telefunken Gmbh | Variable condenser |
| US2250329A (en) * | 1939-08-14 | 1941-07-22 | American Steel Package Company | Variable electrical condenser and method of manufacture |
| US3222668A (en) * | 1961-08-16 | 1965-12-07 | Lippel Bernard | Capacitive coder |
| US3537045A (en) * | 1966-04-05 | 1970-10-27 | Alps Electric Co Ltd | Variable capacitor type tuner |
-
1972
- 1972-09-29 US US00293465A patent/US3789331A/en not_active Expired - Lifetime
-
1973
- 1973-01-17 GB GB249873A patent/GB1387382A/en not_active Expired
- 1973-01-19 CA CA161,638A patent/CA974616A/en not_active Expired
- 1973-02-22 JP JP48020744A patent/JPS4976401A/ja active Pending
- 1973-09-28 DE DE19732348978 patent/DE2348978A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3789331A (en) | 1974-01-29 |
| CA974616A (en) | 1975-09-16 |
| JPS4976401A (en) | 1974-07-23 |
| DE2348978A1 (en) | 1974-04-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |