GB625014A - Improvements in or relating to acoustic devices - Google Patents

Improvements in or relating to acoustic devices

Info

Publication number
GB625014A
GB625014A GB3346145A GB3346145A GB625014A GB 625014 A GB625014 A GB 625014A GB 3346145 A GB3346145 A GB 3346145A GB 3346145 A GB3346145 A GB 3346145A GB 625014 A GB625014 A GB 625014A
Authority
GB
United Kingdom
Prior art keywords
ribbon
stiff
relating
central
flexible
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
GB3346145A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 to BE475814D priority Critical patent/BE475814A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3346145A priority patent/GB625014A/en
Priority to FR948086D priority patent/FR948086A/en
Priority to ES177021A priority patent/ES177021A1/en
Publication of GB625014A publication Critical patent/GB625014A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

625,014. Microphones. STANDARD TELEPHONES & CABLES, Ltd., and CRAGG, W. D. Dec. 11, 1945, No. 33461. [Class 40 (iv)] An acoustic ribbon diaphragm is made of thermoplastic material and comprises a central stiff portion and an outer flexible portion whose inner edges can vibrate with the central stiff portion while the outer edges of the flexible portion are stiff. In the example shown, portions of the thermoplastic ribbon 4 are rendered flexible by corrugation, while the central stiff portion is provided with an aluminium electrode 6. The ribbon instead of being approximately straight as shown, may be bent up to an apex in the middle or into an S-bend. Specification 625,013 is referred to.
GB3346145A 1945-12-11 1945-12-11 Improvements in or relating to acoustic devices Expired GB625014A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE475814D BE475814A (en) 1945-12-11
GB3346145A GB625014A (en) 1945-12-11 1945-12-11 Improvements in or relating to acoustic devices
FR948086D FR948086A (en) 1945-12-11 1946-12-06 Manufacturing process of acoustic diaphragms
ES177021A ES177021A1 (en) 1945-12-11 1947-02-28 IMPROVEMENTS IN OR RELATIVE TO ACOUSTIC DIAPHRAGMS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3346145A GB625014A (en) 1945-12-11 1945-12-11 Improvements in or relating to acoustic devices

Publications (1)

Publication Number Publication Date
GB625014A true GB625014A (en) 1949-06-21

Family

ID=10353267

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3346145A Expired GB625014A (en) 1945-12-11 1945-12-11 Improvements in or relating to acoustic devices

Country Status (4)

Country Link
BE (1) BE475814A (en)
ES (1) ES177021A1 (en)
FR (1) FR948086A (en)
GB (1) GB625014A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154172A (en) * 1962-07-19 1964-10-27 Tibbetts Industries Diaphragm and impedance means
US3285364A (en) * 1965-06-01 1966-11-15 Ling Temco Vought Inc Loudspeaker construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154172A (en) * 1962-07-19 1964-10-27 Tibbetts Industries Diaphragm and impedance means
US3285364A (en) * 1965-06-01 1966-11-15 Ling Temco Vought Inc Loudspeaker construction

Also Published As

Publication number Publication date
BE475814A (en)
FR948086A (en) 1949-07-21
ES177021A1 (en) 1947-04-16

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