GB537931A - Improvements in electrostatic loudspeakers - Google Patents

Improvements in electrostatic loudspeakers

Info

Publication number
GB537931A
GB537931A GB330840A GB330840A GB537931A GB 537931 A GB537931 A GB 537931A GB 330840 A GB330840 A GB 330840A GB 330840 A GB330840 A GB 330840A GB 537931 A GB537931 A GB 537931A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
sections
fed
way
fixed electrode
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
GB330840A
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 GB330840A priority Critical patent/GB537931A/en
Publication of GB537931A publication Critical patent/GB537931A/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
    • H04R19/00—Electrostatic transducers
    • H04R19/02—Loudspeakers

Abstract

537,931. Loud-speakers. SHORTER, D. E. L. Feb. 21, 1940, No. 3308. [Class 40 (iv)] In an electrostatic loud-speaker, the fixed electrode or the diaphragm or both is or are divided into electrically separated sections fed through a frequency-selective filter in such a way that the whole of the signal frequency spectrum is fed to one section and only a lowfrequency band to another section. The Figure shows a fixed electrode in four sections, F1, F2, F3, F4, the diaphragm not being shown. The output of valve V is fed to the various sections through resistances R1, R2, R3 which cooperate with the inter-electrode capacities to form a frequency-selective low-pass filter so that the outer sections receive less and less of the higher frequencies. The polarizing battery B is connected through resistances R4 ... R7 in such a way that the outer sections receive a higher voltage than the inner ones. The condensers C1, C2, C3 serve merely as blocking condensers. The amplitude of the voice currents may be graduated in such a way that the outer sections receive the higher voltages. For push-pull working; a multi-section fixed electrode may be arranged on each side of the diaphragm.
GB330840A 1940-02-21 1940-02-21 Improvements in electrostatic loudspeakers Expired GB537931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB330840A GB537931A (en) 1940-02-21 1940-02-21 Improvements in electrostatic loudspeakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB330840A GB537931A (en) 1940-02-21 1940-02-21 Improvements in electrostatic loudspeakers

Publications (1)

Publication Number Publication Date
GB537931A true GB537931A (en) 1941-07-14

Family

ID=9755860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB330840A Expired GB537931A (en) 1940-02-21 1940-02-21 Improvements in electrostatic loudspeakers

Country Status (1)

Country Link
GB (1) GB537931A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631196A (en) * 1949-10-05 1953-03-10 Arthur A Janszen Electrostatic loud-speaker
US3372245A (en) * 1963-01-25 1968-03-05 Matsushita Electric Ind Co Ltd Electrostatic electro-acoustic transducer
US3773984A (en) * 1967-06-06 1973-11-20 P Walker Electrostatic loudspeaker with constant current drive
EP0084608A1 (en) * 1982-01-22 1983-08-03 Savod Sa Elektronni Preobrasuvatelni Elementi Electrostatic acoustical transducer
GB2173068A (en) * 1985-02-08 1986-10-01 Furuno Electric Co Beam forming device
US4703509A (en) * 1985-06-19 1987-10-27 Zavod Za Elektronni Preobrazuvatelni Elementi Electrostatic acoustic converter with stationary electrode having a progressively increasing surface resistance
GB2250658A (en) * 1990-12-07 1992-06-10 Canon Res Ct Europe Ltd Loudspeaker
US6760455B2 (en) 2000-07-13 2004-07-06 American Technology Corporation Electrostatic loudspeaker with a distributed filter
US8184832B2 (en) 2006-04-14 2012-05-22 Harman Murray R Electrostatic loudspeaker capable of dispersing sound both horizontally and vertically
US8670581B2 (en) 2006-04-14 2014-03-11 Murray R. Harman Electrostatic loudspeaker capable of dispersing sound both horizontally and vertically
GB2520352A (en) * 2013-11-19 2015-05-20 Mellow Acoustics Ltd Loudspeakers and loudspeaker drive circuits
WO2021243367A1 (en) * 2020-05-29 2021-12-02 Shure Acquisition Holdings, Inc. Segmented stator plates for electrostatic transducers

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631196A (en) * 1949-10-05 1953-03-10 Arthur A Janszen Electrostatic loud-speaker
US3372245A (en) * 1963-01-25 1968-03-05 Matsushita Electric Ind Co Ltd Electrostatic electro-acoustic transducer
US3773984A (en) * 1967-06-06 1973-11-20 P Walker Electrostatic loudspeaker with constant current drive
EP0084608A1 (en) * 1982-01-22 1983-08-03 Savod Sa Elektronni Preobrasuvatelni Elementi Electrostatic acoustical transducer
GB2173068A (en) * 1985-02-08 1986-10-01 Furuno Electric Co Beam forming device
GB2173068B (en) * 1985-02-08 1989-06-07 Furuno Electric Co Beam forming device
US4703509A (en) * 1985-06-19 1987-10-27 Zavod Za Elektronni Preobrazuvatelni Elementi Electrostatic acoustic converter with stationary electrode having a progressively increasing surface resistance
GB2250658A (en) * 1990-12-07 1992-06-10 Canon Res Ct Europe Ltd Loudspeaker
US6760455B2 (en) 2000-07-13 2004-07-06 American Technology Corporation Electrostatic loudspeaker with a distributed filter
US8184832B2 (en) 2006-04-14 2012-05-22 Harman Murray R Electrostatic loudspeaker capable of dispersing sound both horizontally and vertically
US8670581B2 (en) 2006-04-14 2014-03-11 Murray R. Harman Electrostatic loudspeaker capable of dispersing sound both horizontally and vertically
US9294847B2 (en) 2006-04-14 2016-03-22 Luminos Industries Ltd. Electrostatic loudspeaker capable of dispersing sound both horizontally and vertically
GB2520352A (en) * 2013-11-19 2015-05-20 Mellow Acoustics Ltd Loudspeakers and loudspeaker drive circuits
WO2021243367A1 (en) * 2020-05-29 2021-12-02 Shure Acquisition Holdings, Inc. Segmented stator plates for electrostatic transducers
US20210377671A1 (en) * 2020-05-29 2021-12-02 Shure Acquisition Holdings, Inc. Segmented stator plates for electrostatic transducers
US11582559B2 (en) 2020-05-29 2023-02-14 Shure Acquisition Holdings, Inc. Segmented stator plates for electrostatic transducers

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