GB514060A - Improvements in adjusting or selecting mechanism for the tuning controls of wirelessapparatus - Google Patents
Improvements in adjusting or selecting mechanism for the tuning controls of wirelessapparatusInfo
- Publication number
- GB514060A GB514060A GB1223038A GB1223038A GB514060A GB 514060 A GB514060 A GB 514060A GB 1223038 A GB1223038 A GB 1223038A GB 1223038 A GB1223038 A GB 1223038A GB 514060 A GB514060 A GB 514060A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- motor
- operated
- tuning
- driven
- 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)
Abstract
514,060. Radio receiving sets. PLESSEY CO., Ltd., PACKMAN, P. J., and MORRISON, P. H. April 23, 1938, No. 12230. [Class 40 (v)] [Also in Groups XXXVIII and XXXVI] In a push button system for controlling the tuning of radio sets, each button is allocated to predetermined positions of both the tuning device and the wave range switch. The tuning device and the wave range switch are driven by a common motor 12, Fig. 5, under the control of selector switches A, B the stationary contacts 25, 70 of which are connected to the push buttons 80 ... 84. Groups of buttons, 80, 81 correspond to the long and medium wave bands respectively and the keys 82, 83, 84: effect selection of short waves, very short waves and gramophone reproduction. When a key in a group 80 or 81 is operated, a circuit for the motor 12 is closed over one or other contact 64 or 65 of the switch B and the motor is driven in one or other direction to position the waverange switch until the circuit is broken by the insulating gap 66. The switch A associated with the tuning condenser is rendered ineffective by a switch 73 ... 76 operated by one or other of the clutch magnets 49, 50 which is operated over the contacts of switch B to clutch the switch to the motor. When the wave-range switch is correctly positioned, the clutch is released and the switch 73 ... 76 places the motor 12 under the control of the switch A which is then positioned in accordance with the operated key. The switch A is driven through friction gearing and the contacts 25 are adjustably mounted on supporting frames. Specification 454,735, [Group XXXVII], is referred to. The Provisional Specification also refers to Specification 501,273, [Group XXXVIII]. Reference has been directed by the Comptroller to Specification 197,774.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1223038A GB514060A (en) | 1938-04-23 | 1938-04-23 | Improvements in adjusting or selecting mechanism for the tuning controls of wirelessapparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1223038A GB514060A (en) | 1938-04-23 | 1938-04-23 | Improvements in adjusting or selecting mechanism for the tuning controls of wirelessapparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB514060A true GB514060A (en) | 1939-10-30 |
Family
ID=10000737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1223038A Expired GB514060A (en) | 1938-04-23 | 1938-04-23 | Improvements in adjusting or selecting mechanism for the tuning controls of wirelessapparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB514060A (en) |
-
1938
- 1938-04-23 GB GB1223038A patent/GB514060A/en not_active Expired
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