GB830281A - Improvements in low frequency loudspeaker - Google Patents

Improvements in low frequency loudspeaker

Info

Publication number
GB830281A
GB830281A GB1965457A GB1965457A GB830281A GB 830281 A GB830281 A GB 830281A GB 1965457 A GB1965457 A GB 1965457A GB 1965457 A GB1965457 A GB 1965457A GB 830281 A GB830281 A GB 830281A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
stiffness
loud
movement
toggle
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
GB1965457A
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.)
PHILIP JOSLYN BROWNSCOMBE
Original Assignee
PHILIP JOSLYN BROWNSCOMBE
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 PHILIP JOSLYN BROWNSCOMBE filed Critical PHILIP JOSLYN BROWNSCOMBE
Priority to GB1965457A priority Critical patent/GB830281A/en
Publication of GB830281A publication Critical patent/GB830281A/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
    • H04R7/16—Mounting or tensioning of diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

830,281. Loud-speakers. BROWNSCOMBE, P. J. June 21, 1957, No. 19654/57. Class 40 (4). The stiffness of the air in a loud-speaker cabinet and the stiffness of the diaphragm support are compensated for by a negative stiffness unit. The centre of the diaphragm is connected to a spring-pressed toggle 21 so that any movement of the diaphragm from its mean position causes the toggle to exert a force on the diaphragm proportional to the displacement and in the same direction. Movement of the diaphragm is limited by stops 31, 32. In the event of the pressure inside the casing A varying markedly from atmospheric a switch 41 or 42 is closed to drive an electric pump 33 or 34 to restore the pressure to normal. Minor modifications are described.
GB1965457A 1957-06-21 1957-06-21 Improvements in low frequency loudspeaker Expired GB830281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1965457A GB830281A (en) 1957-06-21 1957-06-21 Improvements in low frequency loudspeaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1965457A GB830281A (en) 1957-06-21 1957-06-21 Improvements in low frequency loudspeaker

Publications (1)

Publication Number Publication Date
GB830281A true GB830281A (en) 1960-03-16

Family

ID=10132950

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1965457A Expired GB830281A (en) 1957-06-21 1957-06-21 Improvements in low frequency loudspeaker

Country Status (1)

Country Link
GB (1) GB830281A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348563A (en) * 1999-04-01 2000-10-04 B & W Loudspeakers Snap-acting over-centre springs assist loudspeaker diaphragm motion
US7664283B2 (en) 2004-10-18 2010-02-16 Andrea Chiesi Devices and transducers with cavity resonator to control 3-D characteristics/harmonic frequencies for all sound/sonic waves

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348563A (en) * 1999-04-01 2000-10-04 B & W Loudspeakers Snap-acting over-centre springs assist loudspeaker diaphragm motion
GB2348563B (en) * 1999-04-01 2003-07-16 B & W Loudspeakers Loudspeaker drive units and loudspeaker systems
US7664283B2 (en) 2004-10-18 2010-02-16 Andrea Chiesi Devices and transducers with cavity resonator to control 3-D characteristics/harmonic frequencies for all sound/sonic waves
EP2265037A2 (en) 2004-10-18 2010-12-22 Daniele Ramenzoni Devices and transducers with cavity resonator to control 3-d characteristics/harmonic frequencies for all sound/sonic waves

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