FR588543A - Improvements to telephone receivers - Google Patents

Improvements to telephone receivers

Info

Publication number
FR588543A
FR588543A FR588543DA FR588543A FR 588543 A FR588543 A FR 588543A FR 588543D A FR588543D A FR 588543DA FR 588543 A FR588543 A FR 588543A
Authority
FR
France
Prior art keywords
telephone receivers
receivers
telephone
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
French (fr)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR588543A publication Critical patent/FR588543A/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02—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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/26—Damping by means acting directly on free portion of diaphragm or cone
FR588543D 1922-11-17 1924-11-05 Improvements to telephone receivers Expired FR588543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US601483A US1551143A (en) 1922-11-17 1922-11-17 Telephone receiver

Publications (1)

Publication Number Publication Date
FR588543A true FR588543A (en) 1925-05-08

Family

ID=10151470

Family Applications (2)

Application Number Title Priority Date Filing Date
FR571381D Expired FR571381A (en) 1922-11-17 1923-10-01 Improvements to telephone receivers
FR588543D Expired FR588543A (en) 1922-11-17 1924-11-05 Improvements to telephone receivers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR571381D Expired FR571381A (en) 1922-11-17 1923-10-01 Improvements to telephone receivers

Country Status (3)

Country Link
US (1) US1551143A (en)
FR (2) FR571381A (en)
GB (2) GB207148A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1078174B (en) * 1956-02-25 1960-03-24 Dr Emil Podszus Suspension for speaker cones with special damping

Also Published As

Publication number Publication date
GB207148A (en) 1925-03-19
FR571381A (en) 1924-05-16
GB235754A (en) 1925-06-25
US1551143A (en) 1925-08-25

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