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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Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson ABfiledCriticalTelefonaktiebolaget LM Ericsson AB
Priority to ES0064385UpriorityCriticalpatent/ES64385Y/en
Publication of ES64385UpublicationCriticalpatent/ES64385U/en
Application grantedgrantedCritical
Publication of ES64385YpublicationCriticalpatent/ES64385Y/en
Reciprocating, Oscillating Or Vibrating Motors
(AREA)
Abstract
A signal device for producing sound in telephone instruments and the like in which the sound producing member consists of a discoidal armature that oscillates in an alternating electromagnetic field, characterized in that the magnetic circuit of the electromagnetic system includes a casing arranged around of the core and the winding of the magnet, whose envelope has an opening in the direction of the axis of the core, and because the armature consists of a disk arranged opposite the opening of the envelope, whose disk, by means of a spring arranged between the The disc and the casing is restrained elastically at a certain distance from the casing, a regulating member being adapted to facilitate the adjustment of the compression of the spring and the amplitude of the oscillation. (Machine-translation by Google Translate, not legally binding)
ES0064385U1957-10-081957-10-08
Signal device
ExpiredES64385Y
(en)
An alternating current sound adjustment system for the alternate current produced by magnetic plate (Machine-translation by Google Translate, not legally binding)