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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Charbonnages de France CDFfiledCriticalCharbonnages de France CDF
Priority to ES92137UpriorityCriticalpatent/ES92137Y/es
Publication of ES92137UpublicationCriticalpatent/ES92137U/es
Application grantedgrantedCritical
Publication of ES92137YpublicationCriticalpatent/ES92137Y/es
Measurement Of Mechanical Vibrations Or Ultrasonic Waves
(AREA)
Abstract
Avisador sonoro de funcionamiento eléctrico, que emite un sonido modulado a la vez en amplitud y en frecuencia, caracterizado por que comprende un único oscilador de baja frecuencia que alimenta un transductor sonoro no aperiódico, un multivibrador que modifica el funcionamiento del referido oscilador y un elemento resistente que produce un deslizamiento de la frecuencia acompañado de una modulación no cortada de la amplitud.
ES92137U1962-03-241962-03-24Avisador sonoro de funcionamiento eléctrico
ExpiredES92137Y
(es)