FR570851A - Improvements in the construction of telephone receivers - Google Patents

Improvements in the construction of telephone receivers

Info

Publication number
FR570851A
FR570851A FR570851DA FR570851A FR 570851 A FR570851 A FR 570851A FR 570851D A FR570851D A FR 570851DA FR 570851 A FR570851 A FR 570851A
Authority
FR
France
Prior art keywords
construction
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)
Inventor
George William Walton
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
Application granted granted Critical
Publication of FR570851A publication Critical patent/FR570851A/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
FR570851D 1923-07-02 1923-09-17 Improvements in the construction of telephone receivers Expired FR570851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1709523A GB210358A (en) 1923-07-02 1923-07-02 Improvements in telephone receivers

Publications (1)

Publication Number Publication Date
FR570851A true FR570851A (en) 1924-05-08

Family

ID=10089155

Family Applications (1)

Application Number Title Priority Date Filing Date
FR570851D Expired FR570851A (en) 1923-07-02 1923-09-17 Improvements in the construction of telephone receivers

Country Status (2)

Country Link
FR (1) FR570851A (en)
GB (1) GB210358A (en)

Also Published As

Publication number Publication date
GB210358A (en) 1924-01-31

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