Electronic detection systems and methods
First Claim
1. An automatically controlled switching system comprising:
- (a) first means for generating short wave radiation,(b) means for transmitting said short wave radiation as an energy field in the vicinity of said first means,(c) second means including a portable circuit means for receiving said short wave radiation and(d) third means for generating a control signal when said second means is within a given short range of said transmitting means,(e) first switch means having a control input from said third means for receiving said control signal,(f) said first switch means having a control input from said third means for receiving said control signal, said first switch means adapted to become activated upon receipt of said control signal,(g) second switch means,(h) key operated means for activating said second switch means to close,(i) a power supply connected to said second switch means, and(j) an output circuit connected to receive electrical energy from said power supply when said first switch means is activated by said control signal from said third means and said second switch means is closed by said key operated means.
0 Assignments
0 Petitions
Accused Products
Abstract
Electronic detection systems and methods are provided for detecting the unauthorized passage of a person or object past a checkpoint defined, for example, by a doorway to a room or building, an entrance or exit gate for a piece of property, a post or pole supporting the detection equipment or hidden detection means. The detection system includes one or more alarms which operate either in the vicinity of the unauthorized object or person detected and/or remote therefrom such as a central monitor station for monitoring a plurality of checkpoint locations. An alarm deactivating device is employed which may be carried by a person or object and which either generates a code or deactivating signal and broadcasts same to a receiver located at the checkpoint or predeterminately affects or alters a radiation field generated in the vicinity of the checkpoint which code, signal or field change is detected and employed to deactivate and alarm or other circuit.
-
Citations
16 Claims
-
1. An automatically controlled switching system comprising:
-
(a) first means for generating short wave radiation, (b) means for transmitting said short wave radiation as an energy field in the vicinity of said first means, (c) second means including a portable circuit means for receiving said short wave radiation and (d) third means for generating a control signal when said second means is within a given short range of said transmitting means, (e) first switch means having a control input from said third means for receiving said control signal, (f) said first switch means having a control input from said third means for receiving said control signal, said first switch means adapted to become activated upon receipt of said control signal, (g) second switch means, (h) key operated means for activating said second switch means to close, (i) a power supply connected to said second switch means, and (j) an output circuit connected to receive electrical energy from said power supply when said first switch means is activated by said control signal from said third means and said second switch means is closed by said key operated means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. An electronic detection system comprising:
-
(a) a first means for generating a radiant energy field, (b) second means including a portable coded circuit movable into said radiant energy field and operable for selectively absorbing energy from said field, (c) third means for generating a control signal when said portable coded circuit is absorbing energy within a given range of said first means, (d) fourth means for receiving said control signal, and (e) control switch means having a control input for receiving said control signal from said fourth means to activate said control switch means upon receipt of said control signal, (f) an additional switch in circuit with said control switch means for completing a circuit with said power supply and said output circuit when both said additional switch and said control switch means are activated (g) a power supply connected to said control switch means, and (h) an output circuit connected to receive electrical energy from said power supply when said control switch means is activated by said electrical control signal.
-
-
16. An automatically controlled switching system comprising:
-
(a) first means for generating short wave radiation, (b) means for transmitting said short wave radiation as a radiant energy field of substantially constant field strength in the vicinity of said first means, (c) second means including a portable electrical circuit movable into said radiant energy field, which, when it intersects said radiant energy field and is within a given short range of said short wave radiation transmitting means, effects the generation of a signal, (d) third means for receiving and converting said signal to an electrical control signal, (e) first switch means having a control input from said third means and connected to receive said electrical control signal and to become activated upon receipt of said signal, (f) second switch means, (g) key operated means for activating said second switch means to close, (h) a power supply connected to said second switch means, and (i) an output circuit connected to receive electrical energy from said power supply when said first switch means is activated by said electrical control signal generated by said third means and said second switch means is closed by the operation of said key operated means.
-
Specification