GB982426A - A tuning device for high-frequency devices - Google Patents
A tuning device for high-frequency devicesInfo
- Publication number
- GB982426A GB982426A GB2840861A GB2840861A GB982426A GB 982426 A GB982426 A GB 982426A GB 2840861 A GB2840861 A GB 2840861A GB 2840861 A GB2840861 A GB 2840861A GB 982426 A GB982426 A GB 982426A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tuning
- cam plate
- spring
- frequency
- shaft
- 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
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
- H03J5/04—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings operated by hand
- H03J5/10—Settings determined by a number of positioning means mounted on a common support, e.g. turret tuner, which is adjustable to desired positions, a different positioning means being in operation in each position
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
982,426. Tuning mechanisms. TELEFUNKEN PATENTVERWERTUNGS-G.m.b.H. Aug. 4, 1961 [Aug. 6, 1960], No. 28408/61. Heading H3Q. In a high-frequency tuning device with two frequency ranges, i.e. television bands I and III, the inductances 5, 7, 9-14 of the individual circuits of a radio receiver are mounted end-to-end on a single insulating tube 4 and tuning is effected by displacement of tuning cores 15 provided within the tube, through the agency of a connecting bar 16 and a cam plate 17. The cam plate 17 is mounted for axial displacement on a rotary shaft 26 and is tapered in the axial direction, a fine motion being provided which displaces the cam plate in this direction. The inductances 5, 9, 11, 13 for the one frequency range alternate with those, viz. 7, 10, 12, 14 for the second range, only one single tuning core 15 being provided for the two inductors of an individual circuit. Switching from one frequency range to the other is performed by movable shortcircuiting bridges 21 which interact with fixed contacts 18 and are carried by a bar 20 actuated by a second cam plate 22 which is integral with the tuning cam plate 17. Also integral with this cam plate are a slotted sleeve 25 which engages pin 27 whereby the cam plates are driven from the shaft 26, and a detent plate 24 co-operating with spring-loaded ball 37 to give a number of fixed tuning positions of the rotating mechanism corresponding to the channels to be received. In each channel position a conical projection 29 on the cam plate 17 is urged by spring 30 into engagement with the end of an adjustable screw 31 corresponding to that channel; fine tuning is performed by adjustment of the screws 31 by means of a spring- loaded screw-driver mechanism 34 carried in bearings 33 on the shaft 26, whereby the cam plate 17 is driven in the axial direction. A screen 23 is provided between the input circuits and valve and the remaining circuits and valves of the tuning device.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1960N0018738 DE1246059B (en) | 1960-08-06 | 1960-08-06 | Channel switch drive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB982426A true GB982426A (en) | 1965-02-03 |
Family
ID=7340671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2840861A Expired GB982426A (en) | 1960-08-06 | 1961-08-04 | A tuning device for high-frequency devices |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1246059B (en) |
| GB (1) | GB982426A (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB526891A (en) * | 1938-03-21 | 1940-09-27 | Johnson Lab Inc | Improvement in variable inductance mechanisms |
| US2282386A (en) * | 1939-04-26 | 1942-05-12 | Johnson Lab Inc | Resonant absorption reducing device |
| BE444226A (en) * | 1941-01-27 | |||
| CH237283A (en) * | 1942-03-21 | 1945-04-15 | Schaub Georg Von | Arrangement for band stretching in radio devices for shortwave reception. |
| FR939880A (en) * | 1947-01-22 | 1948-11-26 | Etablissements Brunet Soc D | Variable permeability tuning system |
| US2534768A (en) * | 1948-10-08 | 1950-12-19 | Belmont Radio Corp | Television tuner |
| US2521968A (en) * | 1949-02-24 | 1950-09-12 | Aladdin Ind Inc | Channel selector |
| US2533810A (en) * | 1949-08-13 | 1950-12-12 | Aladdin Ind Inc | Wide band calibrated tuner and inductor for use therewith |
| GB684041A (en) * | 1950-04-26 | 1952-12-10 | Emi Ltd | Improvements in or relating to the tuning mechanism of radio apparatus |
| US2821624A (en) * | 1954-10-04 | 1958-01-28 | Rca Corp | Ultra-high frequency television converter with decade-tuning turret having unit-tuning vernier |
| DE953540C (en) * | 1955-04-01 | 1956-12-06 | Telefunken Gmbh | Arrangement for coarse and fine adjustment of a tuning element in receivers, in particular as a channel switch for television receivers |
| US2901615A (en) * | 1958-04-25 | 1959-08-25 | Gen Electric | Automatic tuning system |
-
1960
- 1960-08-06 DE DE1960N0018738 patent/DE1246059B/en active Pending
-
1961
- 1961-08-04 GB GB2840861A patent/GB982426A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1246059B (en) | 1967-08-03 |
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