GB629193A - Improvements in or relating to phonographic reproducing machines - Google Patents
Improvements in or relating to phonographic reproducing machinesInfo
- Publication number
- GB629193A GB629193A GB12468/47A GB1246847A GB629193A GB 629193 A GB629193 A GB 629193A GB 12468/47 A GB12468/47 A GB 12468/47A GB 1246847 A GB1246847 A GB 1246847A GB 629193 A GB629193 A GB 629193A
- Authority
- GB
- United Kingdom
- Prior art keywords
- edge
- magnet
- arm
- tracker
- dictating
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
Abstract
629,193. Dictating- machines. SOUNDSCRIBER CORPORATION. May 8, 1947, No. 12468. Convention date, April 17, 1941. [Class 40 (ii)] A back spacing device for a dictating-machine comprises a projection 48 in the side of the tracker arm 13 and an electromagnet 30 operating a knife-edge 41 which bites into the edge of the projection and steps back the tracker arm when the magnet itself is displaced about a pivot 33. The edge 49 is circular and is centred on the tracker arm pivot 17. The knife-edge is mounted on an armature 38 pivoted at 39 on one pole of the U-shaped electromagnet 30 and is biassed away from the edge 49 by a spring 43. When the switch 37 is closed, to energize the magnet, the armature is operated first to bite the edge 49 and the magnet poles are attracted by the iron rod 50 to rotate the magnet and the tracker arm one step. The pick-up 14 is hinged to the arm 13 by a leafspring 15 and is counterbalanced by a coiled spring 16. An attachment 53 supports the needle 20 as it is dragged across the record grooves. Specification 539,534 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US629193XA | 1941-04-17 | 1941-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB629193A true GB629193A (en) | 1949-09-14 |
Family
ID=22045708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12468/47A Expired GB629193A (en) | 1941-04-17 | 1947-05-08 | Improvements in or relating to phonographic reproducing machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB629193A (en) |
-
1947
- 1947-05-08 GB GB12468/47A patent/GB629193A/en not_active Expired
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