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Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups
(AREA)
Abstract
Improvements in electroacoustic transducers, characterized by the fact that a permanent magnet is fixed to the bottom of a blind motor shell, inserting a ductile ring between said elements which is then subjected to an axial pressing while holding them against relative displacement of the one with with respect to the other, finally fixing the aforementioned shell on a support or external loudspeaker shell on whose periphery a seat has been formed, with its concavity oriented in the same direction as the opening of said shell and in which the edge of a shell is fixed. conical membrane, with the concavity directed towards the motor and in whose central part a moving coil disposed between the polar parts of the latter is fixed, the conicity of said membrane being such that the coil is in the same plane as the outer edge of the coil. that. (Machine-translation by Google Translate, not legally binding)
ES276704A1962-04-131962-04-13Improvements in electroacoustic transducers (Machine-translation by Google Translate, not legally binding)
ExpiredES276704A3
(en)
Dynamic loudspeaker with conical membrane - has body fabricated in synthetic material by injection moulding to simplify method of assembling loudspeaker and surround
Method of manufacturing magnetically-anisotropic permanent magnets on an iron basis which contain nickel, aluminium and cobalt as the principal elements