GB328237A - Improvements in or relating to talking machines, and loud speakers - Google Patents

Improvements in or relating to talking machines, and loud speakers

Info

Publication number
GB328237A
GB328237A GB566730A GB566730A GB328237A GB 328237 A GB328237 A GB 328237A GB 566730 A GB566730 A GB 566730A GB 566730 A GB566730 A GB 566730A GB 328237 A GB328237 A GB 328237A
Authority
GB
United Kingdom
Prior art keywords
relating
loud speakers
bar
talking machines
jeffery
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
GB566730A
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.)
WILFRED JOSEPH JEFFERY
Original Assignee
WILFRED JOSEPH JEFFERY
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 WILFRED JOSEPH JEFFERY filed Critical WILFRED JOSEPH JEFFERY
Publication of GB328237A publication Critical patent/GB328237A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • 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
    • H04R7/16—Mounting or tensioning of diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Telephone Set Structure (AREA)

Abstract

328,237. Jeffery, W. G., and Jeffery, W. J. Jan. 22, 1929. Divided on 327,776. Loud-speakers.-A device, stated to increase the volume of sound from a diaphragm A, consists of a channel-shaped member B secured to the diaphragm and a bar C secured to the stylus-bar of a gramophone or actuating member F of a loudspeaker. The bar C is held by springs D', D<2>, against the ends of the legs of the channelled member B, the tension of the springs being. adjusted by screws E<1>, E<2>.
GB566730A 1929-01-22 1929-01-22 Improvements in or relating to talking machines, and loud speakers Expired GB328237A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB215729A GB327776A (en) 1929-01-22 1929-01-22 Improved large diaphragm or cone reproducer applicable for use in gramophones and loud speakers

Publications (1)

Publication Number Publication Date
GB328237A true GB328237A (en) 1930-04-22

Family

ID=9734586

Family Applications (2)

Application Number Title Priority Date Filing Date
GB215729A Expired GB327776A (en) 1929-01-22 1929-01-22 Improved large diaphragm or cone reproducer applicable for use in gramophones and loud speakers
GB566730A Expired GB328237A (en) 1929-01-22 1929-01-22 Improvements in or relating to talking machines, and loud speakers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB215729A Expired GB327776A (en) 1929-01-22 1929-01-22 Improved large diaphragm or cone reproducer applicable for use in gramophones and loud speakers

Country Status (1)

Country Link
GB (2) GB327776A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9913835D0 (en) * 1999-06-14 1999-08-11 B & W Loudspeakers Stiffened membrane assemblies
GB2403091B (en) 2003-06-18 2006-08-09 B & W Loudspeakers Diaphragms for loudspeaker drive units

Also Published As

Publication number Publication date
GB327776A (en) 1930-04-17

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