GB1384968A - Electromechanical transducers - Google Patents

Electromechanical transducers

Info

Publication number
GB1384968A
GB1384968A GB2991973A GB2991973A GB1384968A GB 1384968 A GB1384968 A GB 1384968A GB 2991973 A GB2991973 A GB 2991973A GB 2991973 A GB2991973 A GB 2991973A GB 1384968 A GB1384968 A GB 1384968A
Authority
GB
United Kingdom
Prior art keywords
pick
electromechanical transducers
assembly
fonofilm
industri
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
GB2991973A
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 GB1384968A publication Critical patent/GB1384968A/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)
  • Knitting Machines (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

1384968 Pick-ups FONOFILM INDUSTRI AS 22 June 1973 [18 Aug 1972] 29919/73 Addition to 1293636 Heading H4J A pick-up or other electromechanical transducer, such as described in Specification 1,293,636, of the variable reluctance type, has a replaceable assembly (e.g. a stylus assembly), having permanent magnet portions and an armature which co-operate with a magnetically conductive yoke and one or more coils on the main body of the device.
GB2991973A 1972-08-18 1973-06-22 Electromechanical transducers Expired GB1384968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US281810A US3878342A (en) 1972-08-18 1972-08-18 Replaceable stylus for stereophonic phonograph pickup

Publications (1)

Publication Number Publication Date
GB1384968A true GB1384968A (en) 1975-02-26

Family

ID=23078883

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2991973A Expired GB1384968A (en) 1972-08-18 1973-06-22 Electromechanical transducers

Country Status (6)

Country Link
US (1) US3878342A (en)
JP (2) JPS4960504A (en)
CH (1) CH546528A (en)
DE (2) DE7242940U (en)
GB (1) GB1384968A (en)
HK (1) HK74676A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5832398Y2 (en) * 1976-04-30 1983-07-18 パイオニア株式会社 Electromagnetic cartridge
JPS538102A (en) * 1976-07-12 1978-01-25 Torio Kk Pickup cartridge
US4272652A (en) * 1978-05-25 1981-06-09 Nippon Atsudenki K.K. Moving coil type stereophonic pickup cartridge
FR2502882A1 (en) * 1981-03-26 1982-10-01 Mimran Guy Record disc reproduction stylus - has needle point in longitudinal axis of stylus supported at centre by suspension in annular magnet

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294405A (en) * 1963-12-11 1966-12-27 Audio Dynamics Corp Phonograph pick-up
US3538266A (en) * 1967-10-06 1970-11-03 Micro Seiki Co Ltd Magnetic pickup with inducing magnet axially aligned with the armature
DK124049B (en) * 1969-03-25 1972-09-04 Fonofilm Ind As Magnetic pick-up.
US3694586A (en) * 1969-11-03 1972-09-26 Joseph F Grado Toroidal armature stereophonic pickup
JPS4937527B1 (en) * 1971-02-23 1974-10-09

Also Published As

Publication number Publication date
JPS5635595A (en) 1981-04-08
DE7242940U (en) 1973-04-05
DE2257284A1 (en) 1974-03-07
CH546528A (en) 1974-02-28
HK74676A (en) 1976-12-10
JPS4960504A (en) 1974-06-12
US3878342A (en) 1975-04-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee