GB702090A - Improvements in or relating to gramophones - Google Patents

Improvements in or relating to gramophones

Info

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
Application number
GB23180/51A
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.)
JACOBUS PETRUS TERTIUS VILJOEN
Original Assignee
JACOBUS PETRUS TERTIUS VILJOEN
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 JACOBUS PETRUS TERTIUS VILJOEN filed Critical JACOBUS PETRUS TERTIUS VILJOEN
Publication of GB702090A publication Critical patent/GB702090A/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

  • 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.
GB23180/51A 1950-10-04 1951-10-04 Improvements in or relating to gramophones Expired GB702090A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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