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.)
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Casas Casadesus jose Maria
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Casas Casadesus jose Maria
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Application filed by Casas Casadesus jose MariafiledCriticalCasas Casadesus jose Maria
Priority to ES1975215186UpriorityCriticalpatent/ES215186Y/en
Publication of ES215186UpublicationCriticalpatent/ES215186U/en
Application grantedgrantedCritical
Publication of ES215186YpublicationCriticalpatent/ES215186Y/en
Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers
(AREA)
Abstract
Electrostatic transducer for microphone, essentially characterized by being in a hermetically sealed cylindrical capsule of small dimensions, inside which the microphone and the amplifier are contained, provided with holes for the passage of the wires for the supply to the transistor and load to the membrane there is an outer protective grille of the membrane and this is attached to the capsule by being linked to a washer welded to the body of the box, and being separated from the anode armature by a spacer washer determining the sensitive capsule that is perfectly isolated from the outside. (Machine-translation by Google Translate, not legally binding)
ES1975215186U1975-09-171975-09-17
ELECTROSTATIC TRANSDUCER FOR MICROPHONE.
ExpiredES215186Y
(en)
Improvements in or relating to carbon microphone capsules and more particularly to carbon microphone capsules having a carbon chamber protected against dampness