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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Serna Gil Pedro De
Original Assignee
Serna Gil Pedro De
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Priority to ES0021454UpriorityCriticalpatent/ES21454U/en
Publication of ES21454UpublicationCriticalpatent/ES21454U/en
Length Measuring Devices Characterised By Use Of Acoustic Means
(AREA)
Abstract
Amplifier device for acoustic signals, characterized in that in order to clearly perceive the acoustic signals emitted from another vehicle, in the closed cabin of a car or automobile truck in motion, a device composed of a sound sensor is installed in this, located convenient oriented to the outside, and of a sound amplifier installed in said closed driver's cabin, joining these two elements by conductors in a convenient way. (Machine-translation by Google Translate, not legally binding)
ES0021454U1949-11-241949-11-24Amplifier device for acoustic signals (Machine-translation by Google Translate, not legally binding)
PendingES21454U
(en)
A perfection in the transmitter apparatus of acoustic signals for automobiles, trucks and analog vehicles (Machine-translation by Google Translate, not legally binding)
Improvements in the acoustic signal warning devices for automobiles, trucks and analog vehicles. (Machine-translation by Google Translate, not legally binding)