GB339613A - Improvements in or relating to electrically driven gramophones - Google Patents

Improvements in or relating to electrically driven gramophones

Info

Publication number
GB339613A
GB339613A GB2709229A GB2709229A GB339613A GB 339613 A GB339613 A GB 339613A GB 2709229 A GB2709229 A GB 2709229A GB 2709229 A GB2709229 A GB 2709229A GB 339613 A GB339613 A GB 339613A
Authority
GB
United Kingdom
Prior art keywords
gramophones
turntable
relating
electrically driven
commutator
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
GB2709229A
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.)
VALENTINE POWELL
Original Assignee
VALENTINE POWELL
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 VALENTINE POWELL filed Critical VALENTINE POWELL
Priority to GB2709229A priority Critical patent/GB339613A/en
Publication of GB339613A publication Critical patent/GB339613A/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
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor

Landscapes

  • Dc Machiner (AREA)

Abstract

339,613. Powell, V. May 31, 1930. Rotary machines.-The underside of a gramophone turntable 1 has a number of electromagnets each consisting of an iron core 2 and winding 3, the commutator 5 being mounted on a boss 1<a>. The field magnets 9 with segmental pole-pieces 8<a> are fixed on a supporting member 7. The axes of the magnets 3, 9 are parallel to the axis of the turntable 1. The member 7 carries a bearing casing 6 for the turntable spindle 4, the upper part of the casing 6 having insulated carbon brushes 18 bearing upon the commutator.
GB2709229A 1930-05-31 1930-05-31 Improvements in or relating to electrically driven gramophones Expired GB339613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2709229A GB339613A (en) 1930-05-31 1930-05-31 Improvements in or relating to electrically driven gramophones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2709229A GB339613A (en) 1930-05-31 1930-05-31 Improvements in or relating to electrically driven gramophones

Publications (1)

Publication Number Publication Date
GB339613A true GB339613A (en) 1930-12-18

Family

ID=10254054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2709229A Expired GB339613A (en) 1930-05-31 1930-05-31 Improvements in or relating to electrically driven gramophones

Country Status (1)

Country Link
GB (1) GB339613A (en)

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