GB371433A - Improvements relating to loud-speakers and like sound reproducing apparatus - Google Patents

Improvements relating to loud-speakers and like sound reproducing apparatus

Info

Publication number
GB371433A
GB371433A GB183531A GB183531A GB371433A GB 371433 A GB371433 A GB 371433A GB 183531 A GB183531 A GB 183531A GB 183531 A GB183531 A GB 183531A GB 371433 A GB371433 A GB 371433A
Authority
GB
United Kingdom
Prior art keywords
loud
diaphragm
casing
end wall
speakers
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
GB183531A
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.)
GEORGE DONALD MCLEOD BRAGGINS
Original Assignee
GEORGE DONALD MCLEOD BRAGGINS
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 GEORGE DONALD MCLEOD BRAGGINS filed Critical GEORGE DONALD MCLEOD BRAGGINS
Priority to GB183531A priority Critical patent/GB371433A/en
Publication of GB371433A publication Critical patent/GB371433A/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 
    • 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
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements 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
    • 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
    • H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

371,433. Loud-speakers. BRAGGINS, G. D. M., 91, Bloxham Road, Banbury, Oxfordshire. Jan. 20, 1931, No. 1835. [Class 40 (iv).] A loud - speaker comprises a conical diaphragm a<1>, as shown in the Figure, enclosed within a shallow unobstructed cylindrical casing h, having apertures m in its periphery and a central aperture k in one end wall, the chassis d being secured to the end wall round the aperture k and not in contact with the casing at any other point. According to another aspect of the invention, the conical diaphragm a<1> is enclosed within the cylindrical casing h, secured round the opening k to the chassis d, the apex of the diaphragm extending through an aperture in the rear end wall. Further apertures l may be provided in the front wall of the casing which is preferably of plywood. The rear wall may comprise two or more pieces, not in contact with each other and independently secured to the periphery g, so as to respond to different frequencies, Figs. 3, 4 (not shown). A disc q of brass or other metal may be adjustably mounted in front of the diaphragm a<1> and is stated to improve the reproduction of brass instruments. The loudspeaker may be wholly contained within the cylindrical casing.
GB183531A 1931-01-20 1931-01-20 Improvements relating to loud-speakers and like sound reproducing apparatus Expired GB371433A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB183531A GB371433A (en) 1931-01-20 1931-01-20 Improvements relating to loud-speakers and like sound reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB183531A GB371433A (en) 1931-01-20 1931-01-20 Improvements relating to loud-speakers and like sound reproducing apparatus

Publications (1)

Publication Number Publication Date
GB371433A true GB371433A (en) 1932-04-20

Family

ID=9728827

Family Applications (1)

Application Number Title Priority Date Filing Date
GB183531A Expired GB371433A (en) 1931-01-20 1931-01-20 Improvements relating to loud-speakers and like sound reproducing apparatus

Country Status (1)

Country Link
GB (1) GB371433A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979150A (en) * 1958-10-21 1961-04-11 Jr Jesse C Irby High fidelity loud speaker cabinet
US3239028A (en) * 1963-11-01 1966-03-08 Willard A Murray Sound reproduction system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979150A (en) * 1958-10-21 1961-04-11 Jr Jesse C Irby High fidelity loud speaker cabinet
US3239028A (en) * 1963-11-01 1966-03-08 Willard A Murray Sound reproduction system

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