GB317339A - An improved telephonic loud speaker - Google Patents

An improved telephonic loud speaker

Info

Publication number
GB317339A
GB317339A GB1103428A GB1103428A GB317339A GB 317339 A GB317339 A GB 317339A GB 1103428 A GB1103428 A GB 1103428A GB 1103428 A GB1103428 A GB 1103428A GB 317339 A GB317339 A GB 317339A
Authority
GB
United Kingdom
Prior art keywords
tube
horn
cabinet
coil
loud
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
GB1103428A
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 GB1103428A priority Critical patent/GB317339A/en
Publication of GB317339A publication Critical patent/GB317339A/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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • 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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2861—Enclosures comprising vibrating or resonating arrangements using a back-loaded horn
    • H04R1/2865—Enclosures comprising vibrating or resonating arrangements using a back-loaded horn for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

317,339. Lanchester, F. W. April 14, 1928. Loud-speakers; diaphragms. - The diaphragm of a moving-coil loud-speaker communicates with a horn through a hollow central magnet core and a tube of uniform cross-section at least two feet long. The mica diaphragm b, Fig. 1, and coil d are suspended by three or more adjustable cords e in the annular gap of a pot-magnet , the central pole a of which is drilled with a hole f. A tube g preferably of lead and of uniform bore is connected to the passage f and is housed, Figs. 2, 4, in a cabinet containing a horn which has divergent sides and top and bottom, and may expand logarithmically. The base and roof of the horn are formed of panels, and the smaller end is connected to the tube g through a tube k of tapering form outside the cabinet, while the moving-coil unit m is also supported outside the cabinet and attached to the other end of tube g. Specifications 320,647; 325,784, 327,145, and 327,790, [all in Class 13, Bells &c.], are referred to.
GB1103428A 1928-04-14 1928-04-14 An improved telephonic loud speaker Expired GB317339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1103428A GB317339A (en) 1928-04-14 1928-04-14 An improved telephonic loud speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1103428A GB317339A (en) 1928-04-14 1928-04-14 An improved telephonic loud speaker

Publications (1)

Publication Number Publication Date
GB317339A true GB317339A (en) 1929-08-14

Family

ID=9978827

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1103428A Expired GB317339A (en) 1928-04-14 1928-04-14 An improved telephonic loud speaker

Country Status (1)

Country Link
GB (1) GB317339A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944757A (en) * 1973-08-04 1976-03-16 Kenkichi Tsukamoto High-fidelity moving-coil loudspeaker
DE2827390A1 (en) * 1977-06-27 1979-01-18 Altec Corp SPEAKER FUNNEL
GB2130048A (en) * 1982-10-18 1984-05-23 Hisatsugu Nakamura Speaker system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944757A (en) * 1973-08-04 1976-03-16 Kenkichi Tsukamoto High-fidelity moving-coil loudspeaker
DE2827390A1 (en) * 1977-06-27 1979-01-18 Altec Corp SPEAKER FUNNEL
GB2130048A (en) * 1982-10-18 1984-05-23 Hisatsugu Nakamura Speaker system

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