GB235529A - Improvements in and relating to loud speakers - Google Patents

Improvements in and relating to loud speakers

Info

Publication number
GB235529A
GB235529A GB9844/25A GB984425A GB235529A GB 235529 A GB235529 A GB 235529A GB 9844/25 A GB9844/25 A GB 9844/25A GB 984425 A GB984425 A GB 984425A GB 235529 A GB235529 A GB 235529A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
relating
loud speakers
loud
seibt
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
GB9844/25A
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.)
GEORG SEIBT FABRIK ELEK SCHER
Original Assignee
GEORG SEIBT FABRIK ELEK SCHER
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 GEORG SEIBT FABRIK ELEK SCHER filed Critical GEORG SEIBT FABRIK ELEK SCHER
Publication of GB235529A publication Critical patent/GB235529A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/26—Damping by means acting directly on free portion of diaphragm or cone
    • 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

Abstract

235,529. Seibt Fabrik Elektrischer und Mechanischer Apparate Dr. G. June 16, 1924, [Convention date]. Magnetic instruments.-The diaphragm a of a loud-speaking telephone receiver is damped at several points of its surface by cotton wool, eiderdown or like sound-damping material d which projects through a plurality of holes c in a plate b arranged at a short distance from the diaphragm. The diaphragm may be concave or conical. Specification 226,873 is referred to.
GB9844/25A 1924-06-16 1925-04-15 Improvements in and relating to loud speakers Expired GB235529A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE235529X 1924-06-16

Publications (1)

Publication Number Publication Date
GB235529A true GB235529A (en) 1926-03-11

Family

ID=5897277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9844/25A Expired GB235529A (en) 1924-06-16 1925-04-15 Improvements in and relating to loud speakers

Country Status (1)

Country Link
GB (1) GB235529A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112383763A (en) * 2020-11-11 2021-02-19 青岛海信激光显示股份有限公司 Projection screen and laser projection system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112383763A (en) * 2020-11-11 2021-02-19 青岛海信激光显示股份有限公司 Projection screen and laser projection system

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