GB500111A - Improvements in or relating to wireless receivers and like apparatus - Google Patents
Improvements in or relating to wireless receivers and like apparatusInfo
- Publication number
- GB500111A GB500111A GB18376/37A GB1837637A GB500111A GB 500111 A GB500111 A GB 500111A GB 18376/37 A GB18376/37 A GB 18376/37A GB 1837637 A GB1837637 A GB 1837637A GB 500111 A GB500111 A GB 500111A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wheel
- tuning
- ratio
- pinion
- july
- 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
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
- H03J7/16—Automatic frequency control where the frequency control is accomplished by mechanical means, e.g. by a motor
Landscapes
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
500,111. Adjusting wireless apparatus. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 1, 1937, No. 18376. Convention date, July 1, 1936. [Class 37] [Also in Group XL] . The tuning element of a wireless receiver is actuated from the control spindle through gearing, the ratio of which is automatically altered by a voltage derived from the incoming signal when the receiver is approach. ing exact tune therewith. The tuning condenser 2 is driven from the tuning knob 4 through spindles 12, 11 separated by a friction clutch, 13, 14 and planetary gears comprising a sun wheel 10, planet wheel 1 and a freely mounted wheel 3. A normally inoperative auxiliary gear train comprises the wheel 6 frictionally coupled to pinion 5 on the control spindle and driving a pinion 7, also frictionally associated with the whoel 3. The gear ratio 10, 1, 3, is such as to give a rapid or coarse adjustment of tuning until the desired signal reaches a predetermined strength, e.g. about 250 cycles from the exact in-tune position, when a control voltage actuates an electromagnetic device 15 which engages the toothed periphery of clutch member 13 thereby arresting shaft 11 and the sun wheel 10. Continued rotation of knob 4 now drives the condenser 2 through the gear train 6, 7, 3, 1 the ratio of which may be ten times that of the other planetary system. The wheels 7 and 1 may both engage the inner surface of the wheel 3, Fig. 2 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU500111X | 1936-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB500111A true GB500111A (en) | 1939-02-01 |
Family
ID=19732772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18376/37A Expired GB500111A (en) | 1936-07-01 | 1937-07-01 | Improvements in or relating to wireless receivers and like apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB500111A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2899645A (en) * | 1959-08-11 | erwin |
-
1937
- 1937-07-01 GB GB18376/37A patent/GB500111A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2899645A (en) * | 1959-08-11 | erwin |
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