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Expired
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GB31382/27A
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Individual
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Individual
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Publication of GB292569ApublicationCriticalpatent/GB292569A/en
H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
H04R7/00—Diaphragms for electromechanical transducers; Cones
H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
H04R7/12—Non-planar diaphragms or cones
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Engineering & Computer Science
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Multimedia
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Physics & Mathematics
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Acoustics & Sound
(AREA)
Signal Processing
(AREA)
Diaphragms For Electromechanical Transducers
(AREA)
Abstract
292,569. Brinkmann, F. June 24, 1927, [Convention date]. Diaphragms.-A diaphragm for loudspeakers, talking machines &c., preferably formed of paper impregnated with the substance known under the registered Trade Mark " Bakelite " and having a cone portion 1 and surrounding flange 2, has a ring 3 of insulating material or metal pressed, cast or flanged round the edge of the flange and adapted to support the telephonic unit or needle holder.' Reference has been directed by the Comptroller to Specification 248,433.
GB31382/27A1927-06-241927-11-22Improvements in cone diaphragms for sound amplification or reproduction
ExpiredGB292569A
(en)