Patent ID: 6674364
Filing Date: 2004-01-06
Classification: G08B

Abstract:
An object finder system, comprisinga transmitter module having radio frequency means for selectively generating radio frequency energy, a transmitting antenna connected to said radio frequency means for radiating the radio frequency energy, modulator means connected to said radio frequency generating means for modulating the radiated electrical energy, a digital system for selectively producing at least one train of digital pulses for operating said modulator means, digital controlling means for selectively producing at least two different trains of digital pulses, switching means including a plurality of selectively operable electrical switches for selectively energizing said modulator means while also selectively operating said digital controller means, for selecting one of said trains of pulses, a plurality of receiver modules having means for selectively attaching each module to an object which may need to be located, each of said receiver modules having a radio frequency receiving antenna, radio frequency receiver means connected to said receiving antenna, demodulator means connected to said radio frequency receiving means for selectively producing a received train of pulses corresponding to one of the transmitted trains of pulses, and audio frequency means for producing an audible signal to enable a person to locate the receiver module.