GB702090A - Improvements in or relating to gramophones - Google Patents
Improvements in or relating to gramophonesInfo
- Publication number
- GB702090A GB702090A GB23180/51A GB2318051A GB702090A GB 702090 A GB702090 A GB 702090A GB 23180/51 A GB23180/51 A GB 23180/51A GB 2318051 A GB2318051 A GB 2318051A GB 702090 A GB702090 A GB 702090A
- Authority
- GB
- United Kingdom
- Prior art keywords
- platen
- rim
- parts
- oct
- engagement
- 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
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
- G11B19/265—Friction wheel drive
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Abstract
702,090. Driving gramophone turntables. VILJOEN, J. P. T. Oct. 4, 1951 [Oct. 4, 1950], No. 23180/51. Class 40 (2). [Also in Group XXIV] A turntable comprises a light record supporting platen 12 and a heavier rotary part 13 driven by either one of two rubber friction discs 4a, Fig. 5, from a driven shaft 4b. The platen 12 has lower cork parts 12a and an upper recordengaging felt or rubber sheet. When the platen is stationary, it is supported on a fixed rim 1b above the part 13. To rotate the platen, the part 13 which is normally rotating is lifted by a solenoid or a toggle mechanism 23, 20, 16a to raise the platen off the rim and drive it by frictional engagement with the cork parts 12a, When the part 13 is lowered the platen is quickly stopped by the engagement of the parts 12a with the rim 1b. In a modified form of the toggle arrangement, Fig. 2A (not shown), the height of the part 13 may be adjusted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA702090X | 1950-10-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB702090A true GB702090A (en) | 1954-01-06 |
Family
ID=25562874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23180/51A Expired GB702090A (en) | 1950-10-04 | 1951-10-04 | Improvements in or relating to gramophones |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB702090A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2980429A (en) * | 1957-04-03 | 1961-04-18 | Thorens Sa | Driving device of the turn-table of a speaking machine |
-
1951
- 1951-10-04 GB GB23180/51A patent/GB702090A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2980429A (en) * | 1957-04-03 | 1961-04-18 | Thorens Sa | Driving device of the turn-table of a speaking machine |
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