GB532139A - Improvements in transmission mechanism for use in adjusting wireless receivers and for like purposes - Google Patents
Improvements in transmission mechanism for use in adjusting wireless receivers and for like purposesInfo
- Publication number
- GB532139A GB532139A GB23749/39A GB2374939A GB532139A GB 532139 A GB532139 A GB 532139A GB 23749/39 A GB23749/39 A GB 23749/39A GB 2374939 A GB2374939 A GB 2374939A GB 532139 A GB532139 A GB 532139A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- cord
- drums
- drive
- aug
- 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
- H03J1/10—Rope drive; Chain drive
Landscapes
- Flexible Shafts (AREA)
- Transmission Devices (AREA)
Abstract
532,139. Linkwork. PHILIPS LAMPS, Ltd. Aug. 17, 1939, No. 23749. Convention date, Aug. 20, 1938. [Class 80 (i)] [Also in Group XXXVI] In the transmission of rotary motion from one shaft to another through the medium of a cord drive, e.g. in tuning a wireless receiver, inaccuracy in the drive due to the cord stretching is obviated by passing the cord over a drum 5 mounted rigidly on the driving shaft 2 and attaching the ends of the cord to two drums 3, 4 frictionally mounted on the driven shaft 1 so as to be capable of slight rotation relatively to each other, the relative motion to tighten the cord and the drive to the shaft 1 being transmitted through a member 6 fixedly mounted on the shaft 1 and supporting on a cross piece 9 a transverse pin 12 the ends 12a, 12b of which bear in slots 13a, 13b formed obliquely in opposite directions in the drums 3, 4. The bridge piece is carried on rods 7, 8 and is drawn radially in respect to the shaft 1 by helical springs 10, 11. In a modification (Figs. 4 and 5 not shown) the central bridge member comprises a disc of resilient material which is given an initial tension so that its surface is slightly curved. When the transmission between the drums is no longer free from play, the curved surface is slightly displaced together with its transverse pin thereby causing the required relative rotation of the drums.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL532139X | 1938-08-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB532139A true GB532139A (en) | 1941-01-17 |
Family
ID=19787150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23749/39A Expired GB532139A (en) | 1938-08-20 | 1939-08-17 | Improvements in transmission mechanism for use in adjusting wireless receivers and for like purposes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB532139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2961230A (en) * | 1955-05-25 | 1960-11-22 | Borletti Spa | Apparatus for indicating speed on rectilinear scales in tachometers, particularly for self-propelled vehicles |
-
1939
- 1939-08-17 GB GB23749/39A patent/GB532139A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2961230A (en) * | 1955-05-25 | 1960-11-22 | Borletti Spa | Apparatus for indicating speed on rectilinear scales in tachometers, particularly for self-propelled vehicles |
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