GB832891A - Improvements in or relating to a device for the recording or reproduction of sound tracks - Google Patents

Improvements in or relating to a device for the recording or reproduction of sound tracks

Info

Publication number
GB832891A
GB832891A GB17082/58A GB1708258A GB832891A GB 832891 A GB832891 A GB 832891A GB 17082/58 A GB17082/58 A GB 17082/58A GB 1708258 A GB1708258 A GB 1708258A GB 832891 A GB832891 A GB 832891A
Authority
GB
United Kingdom
Prior art keywords
stylus
carrier
centre
gravity
engagement
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
GB17082/58A
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.)
FONOFILM IND
FONOFILM INDUSTRI AS
Original Assignee
FONOFILM IND
FONOFILM INDUSTRI AS
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 FONOFILM IND, FONOFILM INDUSTRI AS filed Critical FONOFILM IND
Publication of GB832891A publication Critical patent/GB832891A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R11/12—Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Moving Of Heads (AREA)
  • Control Of Cutting Processes (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

832,891. Gramophone pick-ups. FONOFILM INDUSTRI A.S. May 28, 1958 [March 5, 1958], No. 17082/58. Class 40 (4). In a recorder or reproducer in which two moving coil transducers 1, 2 are connected to a common stylus carrier 3, the points of engagement 4, 5 of the moving coils with the stylus carrier are located on a straight line passing through the centre of gravity 7 of the carrier and on either side thereof, the distance x between the centre of gravity and either point being given by the formula #I/M, where I is the moment of inertia of the stylus carrier about an axis through the centre of gravity perpendicular to the plane formed by the stylus tip and the two engagement points, and M is the mass of the stylus. carrier. The stylus 6 is arranged so that straight lines between its tip and the engagement points subtend an angle alpha of 90 degrees.
GB17082/58A 1958-03-05 1958-05-28 Improvements in or relating to a device for the recording or reproduction of sound tracks Expired GB832891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK832891X 1958-03-05

Publications (1)

Publication Number Publication Date
GB832891A true GB832891A (en) 1960-04-21

Family

ID=8153153

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17082/58A Expired GB832891A (en) 1958-03-05 1958-05-28 Improvements in or relating to a device for the recording or reproduction of sound tracks

Country Status (3)

Country Link
US (1) US3051798A (en)
DE (1) DE1138560B (en)
GB (1) GB832891A (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB394325A (en) * 1931-12-14 1933-06-14 Alan Dower Blumlein Improvements in and relating to sound-transmission, sound-recording and sound-reproducing systems
FR747504A (en) * 1931-12-14 1933-06-16
US2025388A (en) * 1934-09-05 1935-12-24 Bell Telephone Labor Inc Sound reproducing system
US2027168A (en) * 1934-09-05 1936-01-07 Bell Telephone Labor Inc Vibration translating device
US2105916A (en) * 1934-09-05 1938-01-18 Bell Telephone Labor Inc Sound reproducing system
US2114471A (en) * 1936-06-20 1938-04-19 Bell Telephone Labor Inc Sound recording and reproducing system
DE816311C (en) * 1949-05-04 1951-10-08 Telefunken Gmbh Pickups
DE1022022B (en) * 1955-06-21 1958-01-02 Telefunken Gmbh Mechanical-electrical converter for the generation or scanning of a grooved sound track
US2864897A (en) * 1958-02-17 1958-12-16 Hoffman Electronics Corp Universal phonograph pickup head or the like

Also Published As

Publication number Publication date
DE1138560B (en) 1962-10-25
US3051798A (en) 1962-08-28

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