GB1308473A - Transducers - Google Patents

Transducers

Info

Publication number
GB1308473A
GB1308473A GB2271870A GB2271870A GB1308473A GB 1308473 A GB1308473 A GB 1308473A GB 2271870 A GB2271870 A GB 2271870A GB 2271870 A GB2271870 A GB 2271870A GB 1308473 A GB1308473 A GB 1308473A
Authority
GB
United Kingdom
Prior art keywords
substrate
semi
conductor
recesses
viscous material
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
GB2271870A
Other languages
English (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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 JP3683369A external-priority patent/JPS4843477B1/ja
Priority claimed from JP3683169A external-priority patent/JPS4919441B1/ja
Priority claimed from JP3683269A external-priority patent/JPS4919442B1/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1308473A publication Critical patent/GB1308473A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Pressure Sensors (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
GB2271870A 1969-05-09 1970-05-11 Transducers Expired GB1308473A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP3683069 1969-05-09
JP3683369A JPS4843477B1 (enrdf_load_stackoverflow) 1969-05-09 1969-05-09
JP3683169A JPS4919441B1 (enrdf_load_stackoverflow) 1969-05-09 1969-05-09
JP3683269A JPS4919442B1 (enrdf_load_stackoverflow) 1969-05-09 1969-05-09

Publications (1)

Publication Number Publication Date
GB1308473A true GB1308473A (en) 1973-02-21

Family

ID=27460323

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2271870A Expired GB1308473A (en) 1969-05-09 1970-05-11 Transducers

Country Status (5)

Country Link
US (1) US3691316A (enrdf_load_stackoverflow)
DE (1) DE2022252C3 (enrdf_load_stackoverflow)
FR (1) FR2060008B1 (enrdf_load_stackoverflow)
GB (1) GB1308473A (enrdf_load_stackoverflow)
NL (1) NL157184B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220341A (en) 1976-06-22 1980-09-02 Ortofon Manufacturing A/S Pickup

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1447392A (en) * 1972-08-17 1976-08-25 Nagamura F Recording apparatus
US5489900A (en) * 1994-06-03 1996-02-06 International Business Machines Corporation Force sensitive transducer for use in a computer keyboard

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR986662A (fr) * 1943-12-03 1951-08-03 Pick-up phonographique
GB693161A (en) * 1948-03-31 1953-06-24 Brush Dev Co Improvements in and relating to electro-mechanical transducer units
US3377439A (en) * 1958-04-03 1968-04-09 Erie Technological Prod Inc Binaural piezoelectric pickup
NL275714A (enrdf_load_stackoverflow) * 1961-03-09 1900-01-01
GB1041744A (en) * 1962-05-14 1966-09-07 Emi Ltd Improvements relating to gramophone pick-ups
US3518508A (en) * 1965-12-10 1970-06-30 Matsushita Electric Ind Co Ltd Transducer
DE1287135B (de) * 1967-06-16 1969-01-16 Telefunken Patent Elektroakustischer Wandler mit einer Schicht aus Halbleitermaterial bedeckten Membran

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220341A (en) 1976-06-22 1980-09-02 Ortofon Manufacturing A/S Pickup

Also Published As

Publication number Publication date
DE2022252A1 (de) 1971-05-27
FR2060008B1 (enrdf_load_stackoverflow) 1975-02-21
NL157184B (nl) 1978-06-15
DE2022252B2 (de) 1973-05-30
US3691316A (en) 1972-09-12
DE2022252C3 (de) 1973-12-13
NL7006697A (enrdf_load_stackoverflow) 1970-11-11
FR2060008A1 (enrdf_load_stackoverflow) 1971-06-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years