Theft detection system and method
First Claim
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1. A theft detection system comprising in combination with a movable object to be protected against theft, said system including;
- first means for detecting the motion of said object when said object is moved away from an at-rest location,said first means including means for generating analog electrical signals which are indicative of the motion of said objects from and beyond said at-rest location,second means for receiving said analog signals and digitizing same to generate digital signals representative of said analog signals,third means including electronic computing means for receiving the digital signals generated by said second means and generating control signals,fourth means for receiving said control signals and operative to generate code signals,fifth means for short wave transmitting said code signals,sixth means including short wave receiving means for receiving said short wave transmitted code signals, andseventh means including an alarm means connected to said short wave receiving means for receiving and using the code signals received thereby and generating an indication of an attempt to move said object from said at-rest location.
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Abstract
A theft detection system and method for detecting the unauthorized movement of an article or assembly from a given location, such as in the act of theft or burglarizing a home, office, store or warehouse. Detection of such unauthorized movement or theft may be made at a remote location, such as a monitor station particularly when such movement is detected beyond predetermined bounds or limits. The system involves the short wave transmission of code signals which are indicative of the identity of the article or assembly and/or the location of its unauthorized movement.
90 Citations
13 Claims
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1. A theft detection system comprising in combination with a movable object to be protected against theft, said system including;
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first means for detecting the motion of said object when said object is moved away from an at-rest location, said first means including means for generating analog electrical signals which are indicative of the motion of said objects from and beyond said at-rest location, second means for receiving said analog signals and digitizing same to generate digital signals representative of said analog signals, third means including electronic computing means for receiving the digital signals generated by said second means and generating control signals, fourth means for receiving said control signals and operative to generate code signals, fifth means for short wave transmitting said code signals, sixth means including short wave receiving means for receiving said short wave transmitted code signals, and seventh means including an alarm means connected to said short wave receiving means for receiving and using the code signals received thereby and generating an indication of an attempt to move said object from said at-rest location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12)
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11. A theft detection system comprising in combination with a movable object to be protected against theft and including:
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first means for detecting vibrations imparted to said movable object during its movement from an at-rest location, said first means including means for generating electrical signals which are indicative of the vibrations detected and digitizing means for receiving said electrical signals and generating digital signals indicative of said vibrations, second means for including electronic computing means for receiving the digital signals generated by said digitizing means and generating control signals, third means for receiving said control signals and generating code signals, fourth means for short wave transmitting said code signals, fifth means for including short wave receiving means for receiving the short wave code signals transmitted by said fourth means, and alarm means connected to said short wave receiving means for receiving and using the code signals received by said fifth means and generating an indication of an attempt to move said object from said at-rest location.
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13. A theft detection system comprising in combination with a movable object to be protected against theft including:
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first means for detecting the movement of said object from an at-rest location and generating control signals, second means for receiving said control signals and generating code signals, means for short wave transmitting said code signals, short wave receiving means for receiving said short wave transmitted code signals, alarm means connected to said short wave receiving means for receiving and using the code signals received thereby and generating an indication of an attempt to move said object from said at-rest location, battery means for energizing said first and second means, a normally open switch means connected between said battery means and said first and second means for preventing energizing current from said battery means from being used, said normally open switch means being inertially operable to close and connect said battery means with said first and second means and said short wave transmitting means when the motion of said object is detected by said first means, and latch means for maintaining said normally open switch means closed for a sufficient time interval after it is closed to permit said control signals to be generated by said second means and to be short wave transmitted to said third means.
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Specification