GB522248A - Improvements relating to the tuning of radio receivers - Google Patents
Improvements relating to the tuning of radio receiversInfo
- Publication number
- GB522248A GB522248A GB2938938A GB2938938A GB522248A GB 522248 A GB522248 A GB 522248A GB 2938938 A GB2938938 A GB 2938938A GB 2938938 A GB2938938 A GB 2938938A GB 522248 A GB522248 A GB 522248A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- tuning
- cam
- spring
- arm
- 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
- Mechanical Control Devices (AREA)
- Structure Of Receivers (AREA)
Abstract
522,248. Push-button tuning mechanism. COLE. Ltd., E. K., and SHACKELL. A. Oct. 11, 1938. No, 29389. [Class 37] In push button tuning arrangements of the cam and lever type the depression of a push button lever increases the potential energy of a spring which is released at the end of the lever stroke to effect the tuning operation. The motion of the tuning gear is controlled by a governor and the adjusting means for the initial setting of the press buttons is only accessible when the latter are in the depressed position. Each press button 1 is mounted on a lever 2 pivoted on a pin 3 and provided with bifurcated arms 2a, 2b. The arm 2a projects through a slot in a sliding rod 4 which supports a pivoted cam 17 and a bell-crank lever 8 having arms 8a, 8b and pivoting on a pin 7 carrying a disc 6. The arm 8a is attached to the lever 2 by a spring 21 and cord passing over a roller 5. The rod 4 is held in the neutral position by a catch 12 engaging in a slot 11 in which position the arm 8b engages a stop 9. The tuning elements (e.g. ganged condensers) are connected through suitable gearing (not shown) to a slotted rocker bar 18. On depressing the lever 2 against the action of a restoring spring 15, the tension of the spring 21 is increased until a lip. on the arm 2b passes over the end of a spring actuated latch bar 14 thereby locking the lever (and at the same time releasing any other lever in the operative position). At the same time a projection 13 on the arm 2b contacts with the disc 6 thus raising the sliding bar 4 to free it from the catch 12 whereupon the bar moves under the action of the spring 21 until the cam 17 contacts with the rocker 18 and moves this and the attached tuning elements to the desired position. Movement of the bar 4 is controlled bv frictional contacts of the cam 8b with a roller 10 provided with any type of governor mechanism. Initial setting of the tuning is obtained by tuning in the required station manually and then depressing the lever until the freely pivoted cam 17 enters into correct angular engagement with the rocker 18 whereupon the cam is locked in the set position by a locking member 19, adjusted by a knob 20 which is only accessible when the button 1 is depressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2938938A GB522248A (en) | 1938-10-11 | 1938-10-11 | Improvements relating to the tuning of radio receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2938938A GB522248A (en) | 1938-10-11 | 1938-10-11 | Improvements relating to the tuning of radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB522248A true GB522248A (en) | 1940-06-13 |
Family
ID=10290790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2938938A Expired GB522248A (en) | 1938-10-11 | 1938-10-11 | Improvements relating to the tuning of radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB522248A (en) |
-
1938
- 1938-10-11 GB GB2938938A patent/GB522248A/en not_active Expired
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