| 摘要 |
<p>-OF THE DISCLOSURE: Optical acoustical signalling apparatus, particularly for personal safety. It includes an optical acoustical signaller and an operating and controlling unit, which comprises: a supply source, an inertial switch, a first signal operating generator for the acoustical transducer, connected to the inertial swtich, a second signal operating generator for the optical transducer having the set input connected to the output of the first generator, a two-position and threeway commutator, which set the apparatus to operate as passage detector from a static condition to a dynamic condition and vice versa. In the first position of the commutator, the inertial switch is set for starting, when activated, the generator. In the second position the inertial switch is set for resetting the first generator which was set on the supplying of the apparatus.</p> |
