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Individual
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Individual
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Priority to ES0034032UpriorityCriticalpatent/ES34032U/en
Publication of ES34032UpublicationCriticalpatent/ES34032U/en
Electric megaphone, essentially characterized by being constituted by an exponential high-sensitivity horn, an air-pressure membrane loudspeaker and a microphone that can be directly coupled to this horn, or be linked to it by a flexible conductor, the current being This microphone's power supply is provided by a battery that carries the megaphone itself, either by the battery of a car, to which it is applied, or by the lighting line, using appropriate reducers and rectifiers. (Machine-translation by Google Translate, not legally binding)
ES0034032U1952-12-241952-12-24Electric megaphone (Machine-translation by Google Translate, not legally binding)
PendingES34032U
(en)
An electrical safety system applicable to automobiles to create or transmit acoustic and luminous signals (Machine-translation by Google Translate, not legally binding)
Improvements in the installation of electrical equipment transmitters of acoustic signals for vehicles (Machine-translation by Google Translate, not legally binding)
Improvements introduced in the apparatus intended for the capture of sounds, so that they can be audible from the cabin of any motor vehicle (Machine-translation by Google Translate, not legally binding)
Apparatus for the fonation without vocal strings, especially suitable for laringectomatized (Machine-translation by Google Translate, not legally binding)