GB714813A - Change-speed friction driving device for gramophone turn-tables - Google Patents

Change-speed friction driving device for gramophone turn-tables

Info

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
Application number
GB22796/52A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
THORENS SA
Original Assignee
THORENS SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by THORENS SA filed Critical THORENS SA
Publication of GB714813A publication Critical patent/GB714813A/en
Expired legal-status Critical Current

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,
GB22796/52A 1951-09-12 1952-09-11 Change-speed friction driving device for gramophone turn-tables Expired GB714813A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (8)

* Cited by examiner, † Cited by third party
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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