GB245679A - Improvements in sound-boxes for talking machines and like devices - Google Patents

Improvements in sound-boxes for talking machines and like devices

Info

Publication number
GB245679A
GB245679A GB1897725A GB1897725A GB245679A GB 245679 A GB245679 A GB 245679A GB 1897725 A GB1897725 A GB 1897725A GB 1897725 A GB1897725 A GB 1897725A GB 245679 A GB245679 A GB 245679A
Authority
GB
United Kingdom
Prior art keywords
sound
boxes
devices
sound box
box
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
GB1897725A
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.)
LEO ANDREA SMITH
Original Assignee
LEO ANDREA SMITH
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 LEO ANDREA SMITH filed Critical LEO ANDREA SMITH
Priority to GB1897725A priority Critical patent/GB245679A/en
Publication of GB245679A publication Critical patent/GB245679A/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)
  • Telephone Set Structure (AREA)

Abstract

245,679. Smith, L. A. July 25, 1925. Sound-box casings.-A stepped surface which is out of parallelism with the diaphragm is arranged to form the back of the sound box, and provision may be made for rotary adjustment or bodily lateral displacement of this surface to adjust the sound box for different classes of reproduction. This surface, constituted as a series of steps g fixed or formed on a block f integral with or mounted in a cylinder e, is movable within an aluminium cylinder d secured to the sound box a. A packing ring i may be arranged between the members d, e to move with either, and the part e may be bodily adjusted by a screw k. The surface g may be of wood, ebonite, lead &c.
GB1897725A 1925-07-25 1925-07-25 Improvements in sound-boxes for talking machines and like devices Expired GB245679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1897725A GB245679A (en) 1925-07-25 1925-07-25 Improvements in sound-boxes for talking machines and like devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1897725A GB245679A (en) 1925-07-25 1925-07-25 Improvements in sound-boxes for talking machines and like devices

Publications (1)

Publication Number Publication Date
GB245679A true GB245679A (en) 1926-01-14

Family

ID=10121685

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1897725A Expired GB245679A (en) 1925-07-25 1925-07-25 Improvements in sound-boxes for talking machines and like devices

Country Status (1)

Country Link
GB (1) GB245679A (en)

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