GB504022A - Improvements in or relating to the electrical control of tuning mechanism for radio apparatus - Google Patents
Improvements in or relating to the electrical control of tuning mechanism for radio apparatusInfo
- Publication number
- GB504022A GB504022A GB24839/37A GB2483937A GB504022A GB 504022 A GB504022 A GB 504022A GB 24839/37 A GB24839/37 A GB 24839/37A GB 2483937 A GB2483937 A GB 2483937A GB 504022 A GB504022 A GB 504022A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- wave range
- contact
- depressed
- button
- 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
- H03J5/14—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 auxiliary power
- H03J5/146—Settings desired by a switch controlled together with the tuning member and which stops the control as soon as a desired position is reached
Landscapes
- Selective Calling Equipment (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
504,022. Wireless receiving-apparatus. MITCHELL, F. A. Sept. 13,- 1937, No. 24839. [Class 40 (v)] [Also in Group XXXVIII] Upon a press-button 18 being depressed, a circuit from rectifier 21 is. completed over a contact 17, e.g. E, to energize a solenoid 10 which rotates, through a sector 9, the shaft 6 of the tuning element, the circuit being broken when. the contact passes on to the insulation between contact plates 13, 14 mounted on the shaft. In order to effect a change in the wave range, a button 28 or 32 is depressed to rotate the shaft to one of its extreme positions, projections 29, 31 engaging a pin 30 to actuate through a'linkage, the shaft 27 of a wave range switch. It may be arranged that in further positions of the shaft 24, the apparatus may be set for playing gramophone records and television reception. In a modification, Fig. 6 (not shown), the wave range changing pressbuttons control a polarized relay and the station selecting buttons may operate the wave range changing buttons, if necessary. Specifications 416,435, 416,775 and 501,370, [Group XXXVIII], are referred to.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB24839/37A GB504022A (en) | 1937-09-13 | 1937-09-13 | Improvements in or relating to the electrical control of tuning mechanism for radio apparatus |
| US229642A US2245804A (en) | 1937-09-13 | 1938-09-13 | Tuning mechanism for radio apparatus |
| FR843458D FR843458A (en) | 1937-09-13 | 1938-09-13 | Improvements to mechanisms for tuning t devices. s. f. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB24839/37A GB504022A (en) | 1937-09-13 | 1937-09-13 | Improvements in or relating to the electrical control of tuning mechanism for radio apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB504022A true GB504022A (en) | 1939-04-13 |
Family
ID=10218052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24839/37A Expired GB504022A (en) | 1937-09-13 | 1937-09-13 | Improvements in or relating to the electrical control of tuning mechanism for radio apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2245804A (en) |
| FR (1) | FR843458A (en) |
| GB (1) | GB504022A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2491808A (en) * | 1942-08-06 | 1949-12-20 | Gen Electric | Multichannel radio and television receiver |
-
1937
- 1937-09-13 GB GB24839/37A patent/GB504022A/en not_active Expired
-
1938
- 1938-09-13 US US229642A patent/US2245804A/en not_active Expired - Lifetime
- 1938-09-13 FR FR843458D patent/FR843458A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR843458A (en) | 1939-07-04 |
| US2245804A (en) | 1941-06-17 |
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