GB714813A - Change-speed friction driving device for gramophone turn-tables - Google Patents
Change-speed friction driving device for gramophone turn-tablesInfo
- Publication number
- GB714813A GB714813A GB22796/52A GB2279652A GB714813A GB 714813 A GB714813 A GB 714813A GB 22796/52 A GB22796/52 A GB 22796/52A GB 2279652 A GB2279652 A GB 2279652A GB 714813 A GB714813 A GB 714813A
- Authority
- GB
- United Kingdom
- Prior art keywords
- support
- change
- spindle
- friction
- pivoted
- 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
- Friction Gearing (AREA)
Abstract
714,813. Change-speed friction gearing. THORENS SOC. ANON. Sept. 11, 1952 [Sept. 12. 1951], No. 22796/52. Class 80 (2) A driving device for a gramophone turntable (not shown), provided with a change-speed gear between a driving shaft 5 and a main idler wheel 22 which is carried by an arm 20 displaceable in one horizontal plane only and which drives the turntable by friction, is characterized by the change-speed gear comprising a friction drum 26 fastened to and coaxial with the main idler wheel 22, a friction roller, having steps g<SP>1</SP>, g<SP>2</SP>, g<SP>3</SP>, being secured to the driving shaft, and a single secondary idler 8, mounted on a movable support 7, being in frictional engagement with both the main idler wheel and with one or other of the steps gl, &c. on the driving roller, according to the position of the movable support. The arm 20 is pivoted on an arm 21 pivoted to a support 4 suspended from the gramophone base plate, and is engaged by one end of a spring 23. The support 7 carries a spindle 10, which is both axially and rotatably movable within a sleeve 11 secured to the support 4, and also a spindle 32. The end of the spindle 10 lies on a control plate member C. pivoted on the support 4 at'13 and having three levels p1, p2, p3 correspondto the three steps g1 &c. on the driving roller, the levels p1 &c. being connected by slopes 34 so that when the member C is rotated on its pivot 13 by manual operation of a lever 14, the spindle 10 and plate 7 are raised (or lowered) to change the velocity ratio; the spindle 32 on the plate 7 engaging teeth 33 on the member C, the support 7 is at the same time turned to disengage the secondary idler 8 from the stepped driving roller during change of velocity ratio. The control member C is retained in a position corresponding to a chosen velocity ratio by a spring-urged ball engaging in holes d1 therein, the angular movement of the control member being limited by a finger 16 engaging in a slot 15,
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH714813X | 1951-09-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB714813A true GB714813A (en) | 1954-09-01 |
Family
ID=4531024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22796/52A Expired GB714813A (en) | 1951-09-12 | 1952-09-11 | Change-speed friction driving device for gramophone turn-tables |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB714813A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1042262B (en) * | 1954-12-28 | 1958-10-30 | Plessey Co Ltd | Drive for different speeds with turntables |
US2864261A (en) * | 1954-07-28 | 1958-12-16 | Contina Ag | Gear drive for record players with preferably more than three different speeds |
US2875623A (en) * | 1953-10-21 | 1959-03-03 | Webcor Inc | Multi-speed phonograph drive |
US2876648A (en) * | 1955-08-08 | 1959-03-10 | Gen Ind Co | Variable speed phonograph drive mechanisms |
US2895341A (en) * | 1957-06-05 | 1959-07-21 | Webcor Inc | Motor speed changer |
US2926536A (en) * | 1958-02-24 | 1960-03-01 | Easy Washing Machine Company L | Multiple speed phonograph turntable drive mechanism |
US2991660A (en) * | 1960-04-20 | 1961-07-11 | Cons Electronics Ind | Phonograph drive |
US2995942A (en) * | 1958-10-08 | 1961-08-15 | Arthur K Tateishi | Four-speed turntable driving mechanism for phonographs and manual control instrumentalities therefor |
-
1952
- 1952-09-11 GB GB22796/52A patent/GB714813A/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2875623A (en) * | 1953-10-21 | 1959-03-03 | Webcor Inc | Multi-speed phonograph drive |
US2864261A (en) * | 1954-07-28 | 1958-12-16 | Contina Ag | Gear drive for record players with preferably more than three different speeds |
DE1042262B (en) * | 1954-12-28 | 1958-10-30 | Plessey Co Ltd | Drive for different speeds with turntables |
US2876648A (en) * | 1955-08-08 | 1959-03-10 | Gen Ind Co | Variable speed phonograph drive mechanisms |
US2895341A (en) * | 1957-06-05 | 1959-07-21 | Webcor Inc | Motor speed changer |
US2926536A (en) * | 1958-02-24 | 1960-03-01 | Easy Washing Machine Company L | Multiple speed phonograph turntable drive mechanism |
US2995942A (en) * | 1958-10-08 | 1961-08-15 | Arthur K Tateishi | Four-speed turntable driving mechanism for phonographs and manual control instrumentalities therefor |
US2991660A (en) * | 1960-04-20 | 1961-07-11 | Cons Electronics Ind | Phonograph drive |
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