GB230564A - Improvements in the joints of tone arms of sound reproducing instruments - Google Patents

Improvements in the joints of tone arms of sound reproducing instruments

Info

Publication number
GB230564A
GB230564A GB3196123A GB3196123A GB230564A GB 230564 A GB230564 A GB 230564A GB 3196123 A GB3196123 A GB 3196123A GB 3196123 A GB3196123 A GB 3196123A GB 230564 A GB230564 A GB 230564A
Authority
GB
United Kingdom
Prior art keywords
tone
trunnions
standard
holes
arm
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
GB3196123A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3196123A priority Critical patent/GB230564A/en
Publication of GB230564A publication Critical patent/GB230564A/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
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor

Landscapes

  • Crushing And Grinding (AREA)

Abstract

230,564. Roberts, S. C. H. Dec. 20, 1923. Tone-arm joints.-The vertically hinged supporting socket 3, Fig. 1, of a gramophone tonearm 2 comprises a T-piece which is placed in position through an opening 38 in a tubular standard 15, the upper branch 13 of the T-piece having a bearing 14 at the top of the standard. The corresponding bearing for the lower branch 16 is formed at 17 in the end of a bush 18, which is removable through the bottom of the standard and which is held in position by a set-screw 19. The upper end of the standard has a rubber ring 20 for engagement with the inlet of the amplifier. The tone arm 2 is pivoted, so that it can be lifted vertically, by trunnions 4, Fig. 2, which are pressed radially outwards through diametrically arranged holes in the spherical end 5 of the tonearm by a circular spring 8 to engage holes 9 in a grooved flange 10 on the inlet of the T-piece 3. The trunnions 4 have heads engaging an internal groove 7 in the end 5 in which the spring <.>8 also fits. The tone-arm may be removed from the, socket 3 by pressing the trunnions 4 inwardly against the spring 8 by a suitable implement. The tone-arm may be rotated about its longitudinal axis, after pushing the trunnions in, until these engage a second pair of holes 12 arranged in a line at right-angles to the holes 9 so that the sound-box is held away from the record.
GB3196123A 1923-12-20 1923-12-20 Improvements in the joints of tone arms of sound reproducing instruments Expired GB230564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3196123A GB230564A (en) 1923-12-20 1923-12-20 Improvements in the joints of tone arms of sound reproducing instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3196123A GB230564A (en) 1923-12-20 1923-12-20 Improvements in the joints of tone arms of sound reproducing instruments

Publications (1)

Publication Number Publication Date
GB230564A true GB230564A (en) 1925-03-19

Family

ID=10330952

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3196123A Expired GB230564A (en) 1923-12-20 1923-12-20 Improvements in the joints of tone arms of sound reproducing instruments

Country Status (1)

Country Link
GB (1) GB230564A (en)

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