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FR799859A - Perfectionnements aux reproducteurs pour phonographes - Google Patents

Perfectionnements aux reproducteurs pour phonographes

Info

Publication number
FR799859A
FR799859A FR799859DA FR799859A FR 799859 A FR799859 A FR 799859A FR 799859D A FR799859D A FR 799859DA FR 799859 A FR799859 A FR 799859A
Authority
FR
France
Prior art keywords
reproducers
phonographs
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
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.)
Dictaphone Corp
Original Assignee
Dictaphone Corp
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 Dictaphone Corp filed Critical Dictaphone Corp
Application granted granted Critical
Publication of FR799859A publication Critical patent/FR799859A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Details Of Valves (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
FR799859D 1935-04-15 1935-12-24 Perfectionnements aux reproducteurs pour phonographes Expired FR799859A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16437A US2061475A (en) 1935-04-15 1935-04-15 Reproducer for phonographs

Publications (1)

Publication Number Publication Date
FR799859A true FR799859A (fr) 1936-06-22

Family

ID=21777126

Family Applications (1)

Application Number Title Priority Date Filing Date
FR799859D Expired FR799859A (fr) 1935-04-15 1935-12-24 Perfectionnements aux reproducteurs pour phonographes

Country Status (4)

Country Link
US (1) US2061475A (fr)
DE (1) DE645515C (fr)
FR (1) FR799859A (fr)
GB (1) GB452748A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505124A (en) * 1950-04-25 Valved stethoscope with logarith
US2541164A (en) * 1946-07-01 1951-02-13 Edison Inc Thomas A Valved selective sound control device

Also Published As

Publication number Publication date
DE645515C (de) 1937-05-28
US2061475A (en) 1936-11-17
GB452748A (en) 1936-08-28

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