GB543574A - Improvements in or relating to wireless receiving sets - Google Patents
Improvements in or relating to wireless receiving setsInfo
- Publication number
- GB543574A GB543574A GB9703/40A GB970340A GB543574A GB 543574 A GB543574 A GB 543574A GB 9703/40 A GB9703/40 A GB 9703/40A GB 970340 A GB970340 A GB 970340A GB 543574 A GB543574 A GB 543574A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spindle
- wheel
- motor
- roller
- condenser
- 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
- H03J5/143—Settings determined by a number of positioning means mounted on a common support, e.g. turret tuner, which is adjustable to determined positions, a different positioning means being in operation in each position
Abstract
543,574. Selective control systems. PHILIPS LAMPS, Ltd. June 3, 1940, No. 9703. Convention date, June 5, 1939. [Class 40 (i)] [Also in Group XXXVI] An arrangement for adjusting a sliding electrode condenser 35 comprises a small electric motor which drives a wheel 23 on a hollow spindle 25 having a friction drive to a spindle 26 carrying a gear wheel 27 in engagement with a wheel 29 to which is fixed a member 30 formed with helical cam surfaces 31, 32. A roller 33 is mounted in a gap in body 30 so as to roll on the outer surface of a cylindrical metal body 19 freely mounted on the same spindle 47 as the wheel 29. The body 19 has bearing on it a number of contact springs corresponding to individual push buttons '(not shown) the arrangement being such that when a particular button is pressed, the motor is energized until the corresponding contact spring engages an insulating part 20 on body 19. When the motor is energized, body 30 is turned through parts 23, 25 and 27 and 29 until roller 33, which normally is diametrically opposed to spindle 25 moves up to engage spindle 25 after which wheel 29 cannot move, and clutch 28 slips. The cam body 30 has acted through roller 34 to move the condenser shaft against spring 36 to a datum position, and now the roller 33 acted on by spindle 25 turns body 19 until the appropriate contact spring engages insulating part 20. This positions an appropriate stop 43 opposite the end of shaft 42 so that when the motor is de-energized condenser shaft 42 returns under the action of spring 36 to its correct setting. At the same time a spring- mounted locating member 37 engages an appropriate recess 40. According as the stations corresponding to the push buttons are in one or other of two wave bands, the motor is arranged to turn in one or other direction to operate the condenser, and this alternative movement of wheel 29 is made use of to operate a wave range switch.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL543574X | 1939-06-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB543574A true GB543574A (en) | 1942-03-04 |
Family
ID=19787288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9703/40A Expired GB543574A (en) | 1939-06-05 | 1940-06-03 | Improvements in or relating to wireless receiving sets |
Country Status (2)
Country | Link |
---|---|
US (1) | US2320808A (en) |
GB (1) | GB543574A (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2433805A (en) * | 1943-09-27 | 1947-12-30 | Zenith Radio Corp | Control means for sequentially and selectively adjusting variable reactances over a band of frequencies |
US2526610A (en) * | 1944-05-05 | 1950-10-17 | Hermann Thorens S A | Mechanical tuning adjuster |
US2574603A (en) * | 1945-06-15 | 1951-11-13 | Rca Corp | Automatic selector mechanism |
US2603329A (en) * | 1946-09-23 | 1952-07-15 | Melpar Inc | Automatic selector mechanism |
US2671168A (en) * | 1948-07-14 | 1954-03-02 | Rca Corp | Automatically tuned receiver |
US2537944A (en) * | 1948-10-06 | 1951-01-16 | Rca Corp | Sequence and preselector signal seeking system |
US2743620A (en) * | 1950-08-30 | 1956-05-01 | Gen Motors Corp | Electrical apparatus |
US2769514A (en) * | 1951-05-03 | 1956-11-06 | Witt Henry Clinton De | Frequency selector device |
DE923442C (en) * | 1952-06-01 | 1955-02-14 | Koerting Radio Werke Oswald Ri | Drive arrangement for the voting mechanism in communications equipment |
US3150338A (en) * | 1962-04-11 | 1964-09-22 | Gen Electric | Fine tuning apparatus for a television receiver |
US3654536A (en) * | 1967-06-19 | 1972-04-04 | Janome Sewing Machine Co Ltd | System for stopping a single phase wound commutator motor at a fixed position |
US3980937A (en) * | 1974-10-24 | 1976-09-14 | Molon Motor And Coil Corporation | Fractional horsepower gear motor |
EP2042517B1 (en) | 2002-09-27 | 2012-11-14 | Xencor, Inc. | Optimized FC variants and methods for their generation |
-
1940
- 1940-06-03 GB GB9703/40A patent/GB543574A/en not_active Expired
- 1940-06-22 US US341826A patent/US2320808A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2320808A (en) | 1943-06-01 |
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