GB151717A - Improvements in and relating to reproducers for phonographs, talking machines and the like - Google Patents

Improvements in and relating to reproducers for phonographs, talking machines and the like

Info

Publication number
GB151717A
GB151717A GB1617219A GB1617219A GB151717A GB 151717 A GB151717 A GB 151717A GB 1617219 A GB1617219 A GB 1617219A GB 1617219 A GB1617219 A GB 1617219A GB 151717 A GB151717 A GB 151717A
Authority
GB
United Kingdom
Prior art keywords
reproducers
phonographs
relating
sound
talking machines
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
GB1617219A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1617219A priority Critical patent/GB151717A/en
Publication of GB151717A publication Critical patent/GB151717A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Slot Machines And Peripheral Devices (AREA)

Abstract

151,717. Mitchell, F. B. June 27, 1919. Sound magnifying and directing appliances.- A sound-controlling valve in a phonograph sound box consists of a shutter J pivoted at U, Fig. 13, or of a disk J, Fig. 9, fastened to a longitudinally movable wire J<1> and adjustable by turning a collar W which has an eccentric hole in which the wire lies.
GB1617219A 1919-06-27 1919-06-27 Improvements in and relating to reproducers for phonographs, talking machines and the like Expired GB151717A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1617219A GB151717A (en) 1919-06-27 1919-06-27 Improvements in and relating to reproducers for phonographs, talking machines and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1617219A GB151717A (en) 1919-06-27 1919-06-27 Improvements in and relating to reproducers for phonographs, talking machines and the like

Publications (1)

Publication Number Publication Date
GB151717A true GB151717A (en) 1920-09-27

Family

ID=10072466

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1617219A Expired GB151717A (en) 1919-06-27 1919-06-27 Improvements in and relating to reproducers for phonographs, talking machines and the like

Country Status (1)

Country Link
GB (1) GB151717A (en)

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