GB1226522A - - Google Patents

Info

Publication number
GB1226522A
GB1226522A GB1226522DA GB1226522A GB 1226522 A GB1226522 A GB 1226522A GB 1226522D A GB1226522D A GB 1226522DA GB 1226522 A GB1226522 A GB 1226522A
Authority
GB
United Kingdom
Prior art keywords
slits
photo
members
electric
row
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
Other languages
English (en)
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 filed Critical
Publication of GB1226522A publication Critical patent/GB1226522A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/008—Transducers other than those covered by groups H04R9/00 - H04R21/00 using optical signals for detecting or generating sound

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Transform (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Optical Head (AREA)
GB1226522D 1968-01-16 1969-01-10 Expired GB1226522A (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP196768 1968-01-16

Publications (1)

Publication Number Publication Date
GB1226522A true GB1226522A (https=) 1971-03-31

Family

ID=11516337

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1226522D Expired GB1226522A (https=) 1968-01-16 1969-01-10

Country Status (3)

Country Link
US (1) US3524950A (https=)
DE (1) DE1901406A1 (https=)
GB (1) GB1226522A (https=)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3007565B1 (fr) * 2013-06-19 2017-05-12 Francois Cretollier Systeme et procede de lecture d'un signal analogique
US10957353B1 (en) * 2020-06-29 2021-03-23 Phix Photonics Assembly Optical phono cartridge and system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR679100A (fr) * 1928-12-04 1930-04-08 Lecteur phonographique ou <<pick-up>> photo-électrique
US3261925A (en) * 1960-10-06 1966-07-19 Bernard Smith Lab Inc A Stereophonic photoelectric transducer
US3325603A (en) * 1963-02-20 1967-06-13 Rabinow Jacob Stereo record player using optical means separate from the tone arm

Also Published As

Publication number Publication date
DE1901406A1 (de) 1969-08-28
US3524950A (en) 1970-08-18

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414B Case decided by the comptroller ** grants allowed (sect. 14/1949)
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee