FR594649A - Improvements to phonographs - Google Patents

Improvements to phonographs

Info

Publication number
FR594649A
FR594649A FR594649DA FR594649A FR 594649 A FR594649 A FR 594649A FR 594649D A FR594649D A FR 594649DA FR 594649 A FR594649 A FR 594649A
Authority
FR
France
Prior art keywords
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
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.)
Parlophone Records Ltd
Original Assignee
Gramophone Co Ltd
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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Application granted granted Critical
Publication of FR594649A publication Critical patent/FR594649A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/44—Styli, e.g. sapphire, diamond
    • G11B3/46—Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank
    • 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
    • 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
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Reciprocating Pumps (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Toys (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR594649D 1924-05-26 1925-03-06 Improvements to phonographs Expired FR594649A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB594649X 1924-05-26

Publications (1)

Publication Number Publication Date
FR594649A true FR594649A (en) 1925-09-16

Family

ID=10483813

Family Applications (2)

Application Number Title Priority Date Filing Date
FR594649D Expired FR594649A (en) 1924-05-26 1925-03-06 Improvements to phonographs
FR594650D Expired FR594650A (en) 1924-05-26 1925-03-06 Improvements to phonographs

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR594650D Expired FR594650A (en) 1924-05-26 1925-03-06 Improvements to phonographs

Country Status (3)

Country Link
CH (2) CH113772A (en)
DE (2) DE435324C (en)
FR (2) FR594649A (en)

Also Published As

Publication number Publication date
DE435324C (en) 1926-10-09
FR594650A (en) 1925-09-16
DE474449C (en) 1929-04-03
CH113772A (en) 1926-02-16
CH114317A (en) 1926-04-01

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