GB658214A - Improvements in phonograph reproducers - Google Patents

Improvements in phonograph reproducers

Info

Publication number
GB658214A
GB658214A GB10360/49A GB1036049A GB658214A GB 658214 A GB658214 A GB 658214A GB 10360/49 A GB10360/49 A GB 10360/49A GB 1036049 A GB1036049 A GB 1036049A GB 658214 A GB658214 A GB 658214A
Authority
GB
United Kingdom
Prior art keywords
arm
viscous fluid
hemispherical
support
damped
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
GB10360/49A
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.)
CBS Broadcasting Inc
Original Assignee
Columbia Broadcasting System Inc
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 Columbia Broadcasting System Inc filed Critical Columbia Broadcasting System Inc
Publication of GB658214A publication Critical patent/GB658214A/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
    • G11B3/02—Arrangements of heads
    • G11B3/10—Arranging, supporting, or driving of heads or of transducers relatively to record carriers

Abstract

658,214. Bearings. COLUMBIA BROADCASTING SYSTEM, Inc. April 19, 1949, No. 10360. Convention date, May 29, 1948. [Class 12 (i)] [Also in Group XXXVIII] Resonance in a gramophone pick-up arm is damped by the introduction of a viscous fluid between the surfaces of the bearing of the arm. In one form, Fig. 1, the arm is supported on a stationary pivotal point and has a hemispherical portion extending, with a small clearance for the viscous fluid, into a hemispherical cavity in the support. In another embodiment, Fig. 3 (not shown), the arm is provided with a hemispherical socket, while the support is in the form of a solid hemisphere, the arm pivoting on the film of viscous fluid between the surfaces. In a third embodiment, Fig. 4 (not shown), two flanged surfaces are employed.
GB10360/49A 1948-05-29 1949-04-19 Improvements in phonograph reproducers Expired GB658214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US658214XA 1948-05-29 1948-05-29

Publications (1)

Publication Number Publication Date
GB658214A true GB658214A (en) 1951-10-03

Family

ID=22065322

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10360/49A Expired GB658214A (en) 1948-05-29 1949-04-19 Improvements in phonograph reproducers

Country Status (1)

Country Link
GB (1) GB658214A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173941A (en) * 1985-04-22 1986-10-22 Philips Nv Pivotal-arm device with scanning unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173941A (en) * 1985-04-22 1986-10-22 Philips Nv Pivotal-arm device with scanning unit
GB2173941B (en) * 1985-04-22 1989-06-28 Philips Nv Pivotal-arm device with a scanning unit for recording and/or reading information on a disc-shaped record carrier

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