Key chain alarm and light

A key chain alarm and light assembly comprising:

• a portable ergonomic casing adapted to be transported by a user, said casing comprising an interior, an exterior, and a portion adapted to be coupled to a key chain;
• a piezoelectric transducer disposed within said casing for acoustically vibrating air and producing audible sounds calling attention to the user;
• a resonator for mounting said transducer, said resonator comprising a biconcave plate spaced apart from said transducer and surrounded by a peripheral ring;
• an acoustic chamber formed within said resonator between said transducer, said plate, and said ring;
• an annular housing within said casing for receiving said resonator, said ring coaxially fitting within said housing;
• a reverberation chamber defined within said housing beneath said plate, said reverberation chamber bounded by an annular reflective surface formed in said casing and spaced apart from said plate;
• a transmission orifice defined in said biconcave plate for connecting said acoustic and reverberation chambers in fluid flow communication;
• an outlet annulus defined in said casing adjacent said housing for connecting said reverberation chamber in fluid flow communication with the exterior of said casing, said outlet annulus generally concentric with said transmission orifice and said annular reflective surface, said outlet annulus having a circular periphery;
• a reflector surrounded by said outlet annulus for reflecting sound within said reverberation chamber, said reflector having a concave inner surface facing said transmission orifice and a convex outer surface projecting outwardly from said casing for distributing sound emanating from said outlet annulus;
• circuit means for activating said alarm means;
• light means projecting from said casing for selectively illuminating said key chain;
• and,
• switch means for selectively activating said circuit means or said light means.

A battery powered personal key chain alarm and light adapted to selectively function as a light or an alarm, said alarm and light comprising:

• an ergonomic casing that facilitates handling of the alarm, said casing comprising a first and a second halves, the perimeters of said halves being substantially mirror images with a slot formed between said halves;
• a switch partially slidably captivate within said slot and a complementary push button partially housed between said first half and a circuit board, said push button penetrating an orifice formed in said first half, said switch and said push button adapted to cooperatively activate a light to illuminate objects, said light physically mounted on said circuit board housed inside said casing;
• an annular collar formed between said circuit board and said second half;
• a speaker assembly partially housed within said collar and captivated by said collar, said speaker assembly adapted to produce an audible alarm signal and comprising:
• a transducer for acoustically vibrating to produce sound waves;
• a spaced apart biconcave, circular plate adjacent said transducer and forming an acoustic chamber therebetween, said acoustic chamber resonating said sound waves;
• a circular transmission orifice penetrating said plate at the center thereof and permitting the transmission of said sound waves from said acoustic chamber;
• a concave reflector integrally attached to one of said halves and concentrically spaced apart from said transmission orifice, said reflector preventing the immediate escape of at least some of said sound waves;
• and,
• a reverberation chamber between said plate and said reflector, said reverberation chamber harmoniously amplifying said sound waves;
• said circuit board adapted to selectively activate said speaker assembly or said light;
• and,
• at least one battery housed within said casing and adapted to provide electrical power to activate said circuit board.