BE500297A - - Google Patents

Info

Publication number
BE500297A
BE500297A BE500297DA BE500297A BE 500297 A BE500297 A BE 500297A BE 500297D A BE500297D A BE 500297DA BE 500297 A BE500297 A BE 500297A
Authority
BE
Belgium
Application number
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.)
Publication of BE500297A publication Critical patent/BE500297A/xx

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
    • H04R11/06—Telephone receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • 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
BE500297D 1951-10-31 BE500297A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI4800A DE959924C (en) 1951-10-31 1951-10-31 Electroacoustic transducer, in particular earphone capsule in telephone systems

Publications (1)

Publication Number Publication Date
BE500297A true BE500297A (en)

Family

ID=7184842

Family Applications (1)

Application Number Title Priority Date Filing Date
BE500297D BE500297A (en) 1951-10-31

Country Status (2)

Country Link
BE (1) BE500297A (en)
DE (1) DE959924C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB806428A (en) * 1956-03-29 1958-12-23 Sten Daniel Vigren Improvements in or relating to polarized electromagnetic devices
NL255013A (en) * 1959-08-21

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE454275C (en) * 1924-02-19 1928-01-03 Neufeldt & Kuhnke Betr Sgesell Loudspeaker phone with a special anchor coupled to the center of the membrane
US1814798A (en) * 1929-03-14 1931-07-14 Gen Electric Apparatus for producing sound
GB396990A (en) * 1932-12-06 1933-08-17 John Henry Walter Lewis Improvements in loud speakers and other apparatus for interconverting electrical andacoustic vibrations
BE476263A (en) * 1946-06-21

Also Published As

Publication number Publication date
DE959924C (en) 1957-03-14

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