GB2097169B - Method and apparatus for mechanically preparing stylus lapping discs - Google Patents

Method and apparatus for mechanically preparing stylus lapping discs

Info

Publication number
GB2097169B
GB2097169B GB8205270A GB8205270A GB2097169B GB 2097169 B GB2097169 B GB 2097169B GB 8205270 A GB8205270 A GB 8205270A GB 8205270 A GB8205270 A GB 8205270A GB 2097169 B GB2097169 B GB 2097169B
Authority
GB
United Kingdom
Prior art keywords
stylus
lapping discs
mechanically preparing
mechanically
preparing
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
GB8205270A
Other versions
GB2097169A (en
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.)
RCA Corp
Original Assignee
RCA Corp
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
Priority claimed from US06/238,805 external-priority patent/US4369604A/en
Priority claimed from US06/238,810 external-priority patent/US4429678A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of GB2097169A publication Critical patent/GB2097169A/en
Application granted granted Critical
Publication of GB2097169B publication Critical patent/GB2097169B/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
    • G11B3/56—Sharpening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/16—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli
    • B24B19/165—Phonograph needles and the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
GB8205270A 1981-02-27 1982-02-23 Method and apparatus for mechanically preparing stylus lapping discs Expired GB2097169B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/238,805 US4369604A (en) 1981-02-27 1981-02-27 Method for mechanically preparing stylus lapping discs
US06/238,810 US4429678A (en) 1981-02-27 1981-02-27 Cutting stylus for mechanically cutting masters for keel-lapping

Publications (2)

Publication Number Publication Date
GB2097169A GB2097169A (en) 1982-10-27
GB2097169B true GB2097169B (en) 1985-03-27

Family

ID=26931983

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8205270A Expired GB2097169B (en) 1981-02-27 1982-02-23 Method and apparatus for mechanically preparing stylus lapping discs

Country Status (3)

Country Link
DE (1) DE3206978A1 (en)
GB (1) GB2097169B (en)
NL (1) NL8200803A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842194A (en) * 1971-03-22 1974-10-15 Rca Corp Information records and recording/playback systems therefor
US4104832A (en) * 1977-03-25 1978-08-08 Rca Corporation Method for forming keel-tipped stylus for video disc systems

Also Published As

Publication number Publication date
NL8200803A (en) 1982-09-16
DE3206978A1 (en) 1982-09-16
GB2097169A (en) 1982-10-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee