GB689873A - Needle for pick-up head of talking-machine using records - Google Patents

Needle for pick-up head of talking-machine using records

Info

Publication number
GB689873A
GB689873A GB1243151A GB1243151A GB689873A GB 689873 A GB689873 A GB 689873A GB 1243151 A GB1243151 A GB 1243151A GB 1243151 A GB1243151 A GB 1243151A GB 689873 A GB689873 A GB 689873A
Authority
GB
United Kingdom
Prior art keywords
needle
records
talking
pick
head
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
GB1243151A
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.)
Hermann Thorens S A
Original Assignee
Hermann Thorens S A
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 Hermann Thorens S A filed Critical Hermann Thorens S A
Priority to GB1243151A priority Critical patent/GB689873A/en
Publication of GB689873A publication Critical patent/GB689873A/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
    • G11B3/44—Styli, e.g. sapphire, diamond

Landscapes

  • Connection Of Plates (AREA)

Abstract

689,873. Gramophone needles. BLAKE, W. H. Inc. (Thorens, S. A.), May 28, 1951, No. 12431/51. Class 40 (ii). A gramophone needle for playing both standard and fine-groove records has a tip with two working surfaces distinct from each other, a surface B with a radius r for engaging the surface b of a fine-groove record, and a surface A with a radius R for engaging the surface a of a standard record. Preferred dimensions are R =0.080 <SP>+ </SP><SP>0.02</SP> - 0.02 mm., r = 0.020 <SP>+ </SP><SP>0.02 </SP> - 0.01 mm., n = 0.025 <SP>+ </SP><SP>0.01</SP> - 0.01 mm., and v = 0.060 <SP>+ </SP><SP>0.02</SP> -0.01 mm. Reference has been directed by the Comptroller to Specification 692,331.
GB1243151A 1951-05-28 1951-05-28 Needle for pick-up head of talking-machine using records Expired GB689873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1243151A GB689873A (en) 1951-05-28 1951-05-28 Needle for pick-up head of talking-machine using records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1243151A GB689873A (en) 1951-05-28 1951-05-28 Needle for pick-up head of talking-machine using records

Publications (1)

Publication Number Publication Date
GB689873A true GB689873A (en) 1953-04-08

Family

ID=10004472

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1243151A Expired GB689873A (en) 1951-05-28 1951-05-28 Needle for pick-up head of talking-machine using records

Country Status (1)

Country Link
GB (1) GB689873A (en)

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