Acoustic warning apparatus for vehicle

Claim 1

An acoustic warning apparatus adapted for giving audible warnings corresponding respectively to abnormal conditions which may taken place in a vehicle, said apparatus comprising detecting means for independently detecting each of said abnormal conditions when they occur, a record means having recorded thereon a plurality of signals corresponding to said warnings, said signals being adapted for being read as respective audible warnings, transducer and driving means for reading one of said signals at a time, control circuit means responsive to said detector means for selecting the appropriate signal to be read and for actuating said transducer and driving means, warning stop means for interrupting the reading of a signal, warning stop release means for overriding said warning stop means and enabling a signal to be read, said warning stop release means including an ignition switch for said vehicle and a circuit operated by said switch to enable the reading of the latter said signal, said transducer and driving means including an amplifier means for amplifying the signal which is read and a motor circuit means for driving the record means, said warning stop means including a switch coupled to said amplifier means for deactivating the same, said motor circuit means being independent of the warning stop means to drive the record means through a cycle so that it is prepared to operate anew upon the next operation of the detecting means, said record means including a magnetic tape, said transducer and driving means including a magnetic head for scanning said tape and moving means for incrementally moving the head transversely of said tape, said control circuit means including an oscillator means and first transistor means coupling the oscillator means selectively to said moving means.