Personal acoustic alarm system
First Claim
1. A personal acoustic alarm unit for providing an audible alarm signal in the audio range comprising a transmitter means including signal generating means for simultaneously generating a plurality of individual sonic signals in the audio frequency range, each such sonic signal having an audio frequency which differs from that of the remaining sonic signals, code generator means connected to receive at least one of said individual sonic signals and operating to apply a unique code thereto, and means for transmitting said sonic signals simultaneously as an audible alarm signal.
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Accused Products
Abstract
The personal acoustic alarm unit produces an audible alarm signal in the audio range to alert persons in the area of the signal transmitter. This audio alarm signal is formed by a plurality of simultaneously generated audio frequency sonic signals, each of which has a different audio frequency. Receiver units are turned to receive the audio frequency sonic signals from a specific transmitter or group of transmitters.
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Citations
16 Claims
- 1. A personal acoustic alarm unit for providing an audible alarm signal in the audio range comprising a transmitter means including signal generating means for simultaneously generating a plurality of individual sonic signals in the audio frequency range, each such sonic signal having an audio frequency which differs from that of the remaining sonic signals, code generator means connected to receive at least one of said individual sonic signals and operating to apply a unique code thereto, and means for transmitting said sonic signals simultaneously as an audible alarm signal.
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4. A personal acoustic alarm system for providing an audible signal in the event a user requires aid and for use in areas where signals which might trigger false alarms may occur, comprising:
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alarm transmitter means specifically associated with the personal acoustic alarm system for simultaneously emitting a plurality of distinct audible alarm signals all of which are unique to said alarm transmitting means, said audible alarm signals providing a substantial audible alarm adjacent to said alarm transmitter means while also being transmitted to locations spaced from said alarm transmitter means; and a signal receiving means associated with said alarm transmitter means for receiving said distinct audible alarm signals and having filter means for blocking signals emitted by a transmitter means not specifically associated with the personal acoustic alarm system for preventing false alarms, and an alarm activating means connected to said filter means for receiving signals passed through said filter and for providing alarm action only when a plurality of said distinct audible alarm signals are passed through said filter means whereby only the audible alarm signals emitted by and unique to said alarm transmitter means cause alarm action. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A personal acoustic alarm system for providing an audible signal in the event a user requires aid and for use in areas where signals which might trigger false alarms may occur, comprising:
an alarm transmitter means specifically associated with the personal acoustic alarm system for simultaneously emitting a plurality of audible alarm signals each having a substantially constant frequency which differs from the frequency of the remaining alarm signals, said audible alarm signals being unique to said alarm transmitting means and providing a noise alarm adjacent to said alarm transmitter means while also being transmitted to locations spaced from said alarm transmitter means;
a signal receiving means associated with said alarm transmitter means for receiving said different constant frequency signals and for blocking signals having frequencies different from those signals emitted by said alarm transmitter means; and
an alarm means connected for activation by said signal receiving means for providing alarm action whereby only the audible alarm signals emitted by and unique to said alarm transmitter means causes alarm action.
Specification