GB525611A - Improvements in or relating to press button tuned radio receivers - Google Patents
Improvements in or relating to press button tuned radio receiversInfo
- Publication number
- GB525611A GB525611A GB526139A GB526139A GB525611A GB 525611 A GB525611 A GB 525611A GB 526139 A GB526139 A GB 526139A GB 526139 A GB526139 A GB 526139A GB 525611 A GB525611 A GB 525611A
- Authority
- GB
- United Kingdom
- Prior art keywords
- button
- depressed
- tuning
- receiver
- move
- 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
- H03J5/04—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 hand
- H03J5/12—Settings determined by a number of separately-actuated driving means which adjust the tuning element directly to desired settings
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Structure Of Receivers (AREA)
Abstract
525,611. Adjusting tuning impedances. COLE, Ltd., E. K., and KEMP,R. Feb. 17, 1939, No. 5261. [Class 37] [Also in Group XL] In a button-tuned receiver of the type in which the press-buttons move an element of a variable impedance, each button is normally locked against rotations, but when depressed can be rotated to effect continuous tuning of the receiver. Three formers 8, 9, 10 carry the various tuning coils, and spindles 12 carry adjustable cores inside the formers. The spindles 12 are held pressed against a rocker bar 6 by springs at the other ends of the former. Press-buttons 3, normally held in their retracted positions by springs, are mounted on the front of the frame, and a latch bar 14 is provided to hold one button depressed at a time. The actuating rod.5, which is of adjustable length, engages the rocker bar 6 when a button is depressed and so positions the spindles 12 together with the coil cores. Pins C fixed to the actuating rods 5 move in slots in a bracket 4. and when a button is depressed the associated pin co-operates with a plate 16 having cam-slots 17. Sliding motion of the plate 16 causes rotation of the shaft 21 which operates the wave-change switches. This switch can set itself in one of three positions, depending upon the shape of the cam-slot associated with the depressed button. The pivot 7 of the rocker bar 6 is connected by linkwork 22, 24, 25 with a pointer 26, which indicates on a scale 28 the position of the ganged cores and the tuning of the receiver. Thus when a button is depressed, a definite position of the tuning coil cores is effected, the wavechange switch is altered if necessary, and an indication of the tuning is given. Also rotation of the depressed button 3 causes the screw 23 to be advanced or withdrawn, so that continuous tuning of the receiver is possible. When not depressed, rotation of the button is prevented by the binding action of a spring the ends of which move in a narrow portion of the slots in plate 4. When the button is depressed, the spring ends move to a wider portion of the slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB526139A GB525611A (en) | 1939-02-17 | 1939-02-17 | Improvements in or relating to press button tuned radio receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB526139A GB525611A (en) | 1939-02-17 | 1939-02-17 | Improvements in or relating to press button tuned radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB525611A true GB525611A (en) | 1940-09-02 |
Family
ID=9792756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB526139A Expired GB525611A (en) | 1939-02-17 | 1939-02-17 | Improvements in or relating to press button tuned radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB525611A (en) |
-
1939
- 1939-02-17 GB GB526139A patent/GB525611A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2397306A (en) | Portable radio receiver | |
| GB684041A (en) | Improvements in or relating to the tuning mechanism of radio apparatus | |
| GB525611A (en) | Improvements in or relating to press button tuned radio receivers | |
| US3065642A (en) | Fine tuning attachment | |
| US2305123A (en) | Preselecting mechanism | |
| GB624968A (en) | Tuning mechanism for radio apparatus | |
| GB511309A (en) | Means for tuning-in wireless receiving apparatus to given broadcasting stations | |
| US2419968A (en) | Push button tuner for multiband radio receivers | |
| US2490526A (en) | Tuning mechanism | |
| US2242055A (en) | Radio tuning mechanism | |
| USRE20357E (en) | Tuning dial | |
| US2237487A (en) | Adjustable tuning mechanism | |
| GB525405A (en) | Tuning device for radio receivers | |
| GB551761A (en) | Tuning mechanism for wireless apparatus | |
| GB434675A (en) | Improvements in or relating to tuning systems for wireless receiving apparatus and the like | |
| GB742939A (en) | Improvements in the press button tuning of radio receivers | |
| US3618404A (en) | Tuning mechanism | |
| US2275286A (en) | Indexing mechanism | |
| US2325864A (en) | Means for turning control shafts to preselected angular positions | |
| US2213849A (en) | Mechanical tuning mechanism for a radio set | |
| US1977889A (en) | Tuning mechanism for radio receiving sets | |
| US2226858A (en) | Radio tuning device | |
| US1627592A (en) | Radio apparatus and current-control device therefor | |
| GB1195910A (en) | Improvements in or relating to Tuning Units. | |
| GB635145A (en) | Improvements in or relating to tuning mechanism for wireless receivers |