GB289176A - Improvements in or relating to sound-boxes for use on gramophones - Google Patents

Improvements in or relating to sound-boxes for use on gramophones

Info

Publication number
GB289176A
GB289176A GB238127A GB238127A GB289176A GB 289176 A GB289176 A GB 289176A GB 238127 A GB238127 A GB 238127A GB 238127 A GB238127 A GB 238127A GB 289176 A GB289176 A GB 289176A
Authority
GB
United Kingdom
Prior art keywords
sound
gramophones
boxes
relating
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
GB238127A
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 GB238127A priority Critical patent/GB289176A/en
Publication of GB289176A publication Critical patent/GB289176A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)

Abstract

289,176. Hibbard, C. G. Oct. 21, 1927. Diaphragms. - The diaphragm of a gramophone sound-box is formed with a central zone convex outwardly passing into a concentric zone a' concave outwardly then into a concentric zone convex outwardly which joins at a square corner with a flat annular portion a, and the apertured backplate of the sound-box is countersunk at d.
GB238127A 1927-10-21 1927-10-21 Improvements in or relating to sound-boxes for use on gramophones Expired GB289176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB238127A GB289176A (en) 1927-10-21 1927-10-21 Improvements in or relating to sound-boxes for use on gramophones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB238127A GB289176A (en) 1927-10-21 1927-10-21 Improvements in or relating to sound-boxes for use on gramophones

Publications (1)

Publication Number Publication Date
GB289176A true GB289176A (en) 1928-04-26

Family

ID=9738540

Family Applications (1)

Application Number Title Priority Date Filing Date
GB238127A Expired GB289176A (en) 1927-10-21 1927-10-21 Improvements in or relating to sound-boxes for use on gramophones

Country Status (1)

Country Link
GB (1) GB289176A (en)

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