GB1000035A - A stereophonic electrodynamic pickup - Google Patents

A stereophonic electrodynamic pickup

Info

Publication number
GB1000035A
GB1000035A GB3741961A GB3741961A GB1000035A GB 1000035 A GB1000035 A GB 1000035A GB 3741961 A GB3741961 A GB 3741961A GB 3741961 A GB3741961 A GB 3741961A GB 1000035 A GB1000035 A GB 1000035A
Authority
GB
United Kingdom
Prior art keywords
stylus arm
pick
vibration
armature
plug
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
GB3741961A
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 GB1000035A publication Critical patent/GB1000035A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R9/16—Gramophone pick-ups using a stylus; Recorders using a stylus signals recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Gyroscopes (AREA)
  • Electromagnets (AREA)

Abstract

1,000,035. Stereophonic pick-ups. FONOFILM INDUSTRI A/S. Oct. 18, 1961 [Oct. 22, 1960], No. 37419/61. Heading H4J. A stereophonic electro-dynamic pick-up comprises a stiff stylus arm 14 (Figs. 1, 2) mounted so as to permit transverse angular vibration thereof in any transverse direction about a vibration centre at or near one end thereof, and an armature 16 of ferromagnetic material extending transversely to the stylus arm 14 and fixed relatively to the stylus arm 14. The centre of gravity of those parts of the pick-up which, during use of the pick-up, will undergo such angular vibration are coincident with or substantially coincident with the vibration centre. Two pick-up coils 17, 18 (Fig. 3) are wound on the armature and a magnetic field passes through the armature in a direction transverse to the winding axes of both coils 17, 18. One coil 17 is electrically insensitive to vibrations of the stylus arm 14 in one transverse direction and the other coil 18 is electrically insensitive to vibrations in a direction substantially perpendicular to said one transverse direction. A rod-shaped permanent magnet 2 provides the magnetic field and has at one end a pole piece 3 and at the other end a yoke 4. A further pole piece 5 is adjustably mounted in yoke 4. In a bore 7 is mounted a plug 8 which is adjustable on loosening a set screw 9. The plug 8 has a bore 10 in which one end of a support 11 for the stylus arm 14 is rigidly fitted. A portion 12 is of reduced cross-section and carries a cylindrical head 13 on which one end of the stylus arm 14 is mounted. Vibration of the stylus arm 14 takes place in the zone of portion 12. Damping is provided by a butyl rubber pad 22, adjustment of the damping being carried out by adjustment of plug 8. Reference has been directed by the Comptroller to Specification 930,367.
GB3741961A 1960-10-22 1961-10-18 A stereophonic electrodynamic pickup Expired GB1000035A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK417160A DK110237C (en) 1960-10-22 1960-10-22 Stereophonic electrodynamic sound recorder.

Publications (1)

Publication Number Publication Date
GB1000035A true GB1000035A (en) 1965-08-04

Family

ID=8130948

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3741961A Expired GB1000035A (en) 1960-10-22 1961-10-18 A stereophonic electrodynamic pickup

Country Status (3)

Country Link
DE (1) DE1195067B (en)
DK (1) DK110237C (en)
GB (1) GB1000035A (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576955A (en) * 1967-08-22 1971-05-04 Matsushita Electric Ind Co Ltd Armature assembly for magnetic-type phonograph pickup
US3627931A (en) * 1968-01-23 1971-12-14 Nippon Columbia Moving magnet type stereo pickup
US3679843A (en) * 1970-12-23 1972-07-25 Micro Seiki Co Ltd Moving coil type phonograph pickup cartridge
US3720796A (en) * 1967-06-20 1973-03-13 Audio Technica Kk Multichannel pickup cartridge
US3729596A (en) * 1970-04-29 1973-04-24 Wilms H Electrodynamic sound pickup or sound-track cutting device
US3761647A (en) * 1968-08-14 1973-09-25 Audio Technica Kk Cartridge for detecting vibrations representing stereophonic sound
JPS523282B1 (en) * 1976-03-18 1977-01-27
US4011417A (en) * 1974-03-19 1977-03-08 Messrs. Kabushiki Kaisha Mitachi Onkyo Seisakusho Dynamic type pickup
US4075418A (en) * 1968-08-14 1978-02-21 Kabushiki Kaisha Audio-Technica Stereophonic pickup cartridge
US4090039A (en) * 1976-07-06 1978-05-16 Sony Corporation Electrodynamic transducer
US4103117A (en) * 1975-12-25 1978-07-25 Trio Kabushiki Kaisha Pick-up cartridge
US4145582A (en) * 1975-04-15 1979-03-20 Ortofon Manufacturing A/S Moving coil pickup having a substantially square magnetic armature mounted in an air gap adjacent a square face magnetic member
EP0002956A1 (en) * 1977-12-29 1979-07-11 Ortofon Manufacturing A/S Pick-up
US4161631A (en) * 1974-12-13 1979-07-17 Nippon Columbia Kabushikikaisha Pickup cartridge
US4179589A (en) * 1976-07-13 1979-12-18 Kenkichi Tsukamoto Phono cartridge
US4263483A (en) * 1977-09-01 1981-04-21 Matsushita Electric Industrial Co., Ltd. Moving coil pick-up assembly for use in a record player
US4272652A (en) * 1978-05-25 1981-06-09 Nippon Atsudenki K.K. Moving coil type stereophonic pickup cartridge
US4376304A (en) * 1979-06-22 1983-03-08 Nippon Atsudenki Kabushiki Kaisha Moving coil type stereophonic pickup cartridge

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516338A (en) * 1948-03-30 1950-07-25 Rca Corp Feedback control system for recording cutters and the like

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720796A (en) * 1967-06-20 1973-03-13 Audio Technica Kk Multichannel pickup cartridge
US3576955A (en) * 1967-08-22 1971-05-04 Matsushita Electric Ind Co Ltd Armature assembly for magnetic-type phonograph pickup
US3627931A (en) * 1968-01-23 1971-12-14 Nippon Columbia Moving magnet type stereo pickup
US3761647A (en) * 1968-08-14 1973-09-25 Audio Technica Kk Cartridge for detecting vibrations representing stereophonic sound
US4075418A (en) * 1968-08-14 1978-02-21 Kabushiki Kaisha Audio-Technica Stereophonic pickup cartridge
US3729596A (en) * 1970-04-29 1973-04-24 Wilms H Electrodynamic sound pickup or sound-track cutting device
US3679843A (en) * 1970-12-23 1972-07-25 Micro Seiki Co Ltd Moving coil type phonograph pickup cartridge
US4011417A (en) * 1974-03-19 1977-03-08 Messrs. Kabushiki Kaisha Mitachi Onkyo Seisakusho Dynamic type pickup
US4161631A (en) * 1974-12-13 1979-07-17 Nippon Columbia Kabushikikaisha Pickup cartridge
US4145582A (en) * 1975-04-15 1979-03-20 Ortofon Manufacturing A/S Moving coil pickup having a substantially square magnetic armature mounted in an air gap adjacent a square face magnetic member
US4103117A (en) * 1975-12-25 1978-07-25 Trio Kabushiki Kaisha Pick-up cartridge
JPS523282B1 (en) * 1976-03-18 1977-01-27
US4090039A (en) * 1976-07-06 1978-05-16 Sony Corporation Electrodynamic transducer
US4179589A (en) * 1976-07-13 1979-12-18 Kenkichi Tsukamoto Phono cartridge
US4263483A (en) * 1977-09-01 1981-04-21 Matsushita Electric Industrial Co., Ltd. Moving coil pick-up assembly for use in a record player
EP0002956A1 (en) * 1977-12-29 1979-07-11 Ortofon Manufacturing A/S Pick-up
US4272652A (en) * 1978-05-25 1981-06-09 Nippon Atsudenki K.K. Moving coil type stereophonic pickup cartridge
US4376304A (en) * 1979-06-22 1983-03-08 Nippon Atsudenki Kabushiki Kaisha Moving coil type stereophonic pickup cartridge

Also Published As

Publication number Publication date
DE1195067B (en) 1965-06-16
DK110237C (en) 1973-01-22

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