GB517420A - Improvements in or relating to radio receivers - Google Patents
Improvements in or relating to radio receiversInfo
- Publication number
- GB517420A GB517420A GB18066/38A GB1806638A GB517420A GB 517420 A GB517420 A GB 517420A GB 18066/38 A GB18066/38 A GB 18066/38A GB 1806638 A GB1806638 A GB 1806638A GB 517420 A GB517420 A GB 517420A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- drum
- button
- energized
- drives
- 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)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Abstract
517,420. Electric control systems. COOPER, A. H. June 17, 1938, No. 18066. [Class 40 (i)] In a push-button or other servo operated radio receiver covering several wave ranges and in which the same motor is used for operating the tuning and wave change mechanisms, the operation of the button for a station outside the range to which the receiver is tuned causes the motor to be coupled first to one. only of the mechanisms and after adjustment of that mechanism to the others. As shown, the depression of one of the buttons closes springs 14, 15 which complete circuits via the control drums 8, 11 for the motor 1 and the clutch magnets 22, 23, one of the latter, say 22, being arranged to operate first and open the circuit of the other. The motor then drives the drum 8 and the tuning condenser (not shown) to the position indicated by the button, whereupon clutch magnet 22 is released and clutch magnet 23 is operated and the motor, which continues to run, drives the drum 12 and the wavechange switch to the position indicated by the button. The motor and clutch magnet are then de-energized. The motor may also be energized by switches 25, 26 in series with a clutch magnet 24 for controlling volume level. In a modification Fig. 2 (not shown), in which there is no provision for volume control the clutches act by moving the motor shaft axially. In a further modification, Fig. 1 (not shown), the motor is normally geared to one drum and drives this drum when energized through a resistance. When energized direct however the armature in known manner moves axially against a spring to gear the motor to the other drum. In all cases a given push button can be associated with stations in different wave ranges with the help of plugs and sockets 19...21. The control drums can. be replaced by discs-and the wave-change switch by an adjustable coil turret. The push button &c. may have volume controlling contacts, and may be replaced by relay or switch contacts controlled, e.g., by a telephone dial. Reference has been directed by the Comptroller to Specification 497,774.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18066/38A GB517420A (en) | 1938-06-17 | 1938-06-17 | Improvements in or relating to radio receivers |
| US277832A US2322280A (en) | 1938-06-17 | 1939-06-07 | Radio receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18066/38A GB517420A (en) | 1938-06-17 | 1938-06-17 | Improvements in or relating to radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB517420A true GB517420A (en) | 1940-01-30 |
Family
ID=10106053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18066/38A Expired GB517420A (en) | 1938-06-17 | 1938-06-17 | Improvements in or relating to radio receivers |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2322280A (en) |
| GB (1) | GB517420A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59107056U (en) * | 1983-01-08 | 1984-07-19 | 三菱電機株式会社 | Auxiliary-equipped starting motor |
-
1938
- 1938-06-17 GB GB18066/38A patent/GB517420A/en not_active Expired
-
1939
- 1939-06-07 US US277832A patent/US2322280A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2322280A (en) | 1943-06-22 |
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