GB491446A - Improvements in or relating to slow motion drives for electric condensers and like tuning devices, particularly for radio receivers - Google Patents
Improvements in or relating to slow motion drives for electric condensers and like tuning devices, particularly for radio receiversInfo
- Publication number
- GB491446A GB491446A GB293437A GB293437A GB491446A GB 491446 A GB491446 A GB 491446A GB 293437 A GB293437 A GB 293437A GB 293437 A GB293437 A GB 293437A GB 491446 A GB491446 A GB 491446A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cage
- shaft
- condenser
- drives
- reduction
- 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
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/06—Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control
- H03J1/14—Special arrangements for fine and coarse tuning
Landscapes
- Friction Gearing (AREA)
Abstract
491,446. Adjusting wireless apparatus ; variable-speed gearing. GENERAL ELECTRIC CO., Ltd., and SPEIRS, R. W. Feb. 1, 1937, No. 2934. [Class 37] [Also in Group XXIV] The invention relates to known slow motion epicyclic ball bearing reduction drives for electric condensers and like tuning devices, for example as described in Specification 439,152,' wherein the driven member is connected to the cage of a ball or roller-bearing and the driving member to one of the races and the other race is constrained so that the balls or rollers rolling between the two races carry round the cage and with it the driven member. According to the invention two of these reduction drives are used in series and in one of them means, which automatically connect the driving member to the cage on continued rotation of the driving member are provided to reduce the reduction ratio thereof to unity for coarse adjustment. The condenser shaft 1 rotatably mounted in a frame 2 forms at its front end a cage 6 in which balls 7 are rotatably mounted between an inner race 8 carried by the driving shaft 9 and an outer race 10 adjustable by nuts 12 on bolts 13. The shaft 9 forms at its forward end a cage 14 in which balls 15 are rotatably mounted between an inner race 16, carried on the driving shaft 17 of the adjusting knob 4, and an outer race 18 adjustably mounted by nuts 20 on a disc 22 rigid with the cage 6. For coarse adjustment, the shaft 8 is turned directly by the adjusting knob 4 through a radial arm 25 on the shaft 17 of knob 4 engaging a projection 26 on the cage 14 whereby the condenser is adjusted through the first mentioned epicyclic reduction drive 9, 7, 10, 6, only. The condenser is coarsely adjusted to slightly beyond the desired position when for fine adjustment the knob 4 is turned backwards and the condenser driven backwards through both reduction drives in series. The disc 22 drives the station indicator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB293437A GB491446A (en) | 1937-02-01 | 1937-02-01 | Improvements in or relating to slow motion drives for electric condensers and like tuning devices, particularly for radio receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB293437A GB491446A (en) | 1937-02-01 | 1937-02-01 | Improvements in or relating to slow motion drives for electric condensers and like tuning devices, particularly for radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB491446A true GB491446A (en) | 1938-09-01 |
Family
ID=9748806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB293437A Expired GB491446A (en) | 1937-02-01 | 1937-02-01 | Improvements in or relating to slow motion drives for electric condensers and like tuning devices, particularly for radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB491446A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3140618A (en) * | 1960-04-07 | 1964-07-14 | North American Aviation Inc | Overtravel mechanism |
-
1937
- 1937-02-01 GB GB293437A patent/GB491446A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3140618A (en) * | 1960-04-07 | 1964-07-14 | North American Aviation Inc | Overtravel mechanism |
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