GB698865A - Improvements in or relating to gramophone record playing apparatus - Google Patents
Improvements in or relating to gramophone record playing apparatusInfo
- Publication number
- GB698865A GB698865A GB530449A GB530449A GB698865A GB 698865 A GB698865 A GB 698865A GB 530449 A GB530449 A GB 530449A GB 530449 A GB530449 A GB 530449A GB 698865 A GB698865 A GB 698865A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pick
- speed
- jockey pulley
- bar
- shaft
- 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
- Moving Of Heads (AREA)
Abstract
698,865. Driving sound reproducing machines. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Feb. 17, 1950 [Feb. 26, 1949], No. 5304/49. Class 40 (ii). In a sound reproducing machine having different transducers for records driven at different speeds, one of said transducers is coupled to the speedchanging means so that when said transducer is in a position to co-operate with the record said speed-changing means is set for driving the record at the appropriate speed. In the embodiment described, a gramophone pick-up 1 intended to play the slower speed records is provided with a rest 11 having a forked lever 12 thereon which is coupled to a sliding bar 13 which is moved to the right, Figs. 1 and 2, when the pick-up is moved to the operative position, the said bar 13 switching the pick-up 1 into connection with an amplifier by means of a switch 31 and effecting the change of speed of the turntable by moving the jockey pulley 9 into engagement with the smaller diameter part 8 of the motor shaft 7. The latter movement is effected by a ramp 26 cooperating with the shaft 22 of the jockey pulley 9 and by the inclined surfaces of a projection 20 on the bar 13 which serve to move the jockey pulley 9 to an inoperative position during the up or down movement of the shaft 22. Another embodiment is described, Fig. 3, in which two pick-ups are combined in a single head 33 mounted on the end of the same arm, the change-over of speeds being effected by the rotation of the head 33, gearwheels 35, 36, and a control rod 39. Specification 698,919 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB530449A GB698865A (en) | 1949-02-26 | 1949-02-26 | Improvements in or relating to gramophone record playing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB530449A GB698865A (en) | 1949-02-26 | 1949-02-26 | Improvements in or relating to gramophone record playing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB698865A true GB698865A (en) | 1953-10-28 |
Family
ID=9793574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB530449A Expired GB698865A (en) | 1949-02-26 | 1949-02-26 | Improvements in or relating to gramophone record playing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB698865A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3481608A (en) * | 1954-01-15 | 1969-12-02 | James T Dennis | Record changer |
-
1949
- 1949-02-26 GB GB530449A patent/GB698865A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3481608A (en) * | 1954-01-15 | 1969-12-02 | James T Dennis | Record changer |
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