Coded security system
First Claim
1. A coded security system comprising:
- a plurality of remote sending means for transmitting coded signals indicative of predetermined conditions at remote locations of a protected area, some of the sending means including sensors for detecting intrusions into the protected area and other of the sending means providing signals indicative of priority emergency conditions;
a central alarm station;
decoding means for receiving and decoding each of the coded signals at the central alarm station and providing discrete decoded signals identifying the individual predetermined conditions indicated by the coded signals transmitted from the remote sending means;
indicating means connected to the decoding means and responsive to each of the discrete signals provided by the decoding means to indicate receipt of a coded signal by the decoding means;
alarm means at the alarm station for generating an alarm signal in response to the discrete decoded signals provided by the decoding means;
selectively operable testing means at the central alarm station connected to the decoding means for gating the discrete decoded signals identifying intrusions to the alarm means from the decoding means, thereby enabling or disabling the alarm means to respond to the intrusion signals; and
circuit means interposed between the decoding means and the alarm means for transmitting the decoded signals identifying priority emergency conditions to the alarm means independently of the testing means whereby the alarm means responds to the priority emergency conditions independently of the testing means and responds the intrusion conditions through the testing means.
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Accused Products
Abstract
An electronic security system has a plurality of remote sending units which transmit coded intrusion and other emergency signals to a central alarm station. The alarm station decodes the received signals and produces an appropriate warning from an alarm generator. Electronic alarm controls at the central station discriminate the intrusion signals from other emergency signals and may block or delay the intrusion signals to allow entry or exit from the protected area. Testing circuits are also included in the alarm controls to establish a test mode of operation in which sending units transmit intrusion signals, and receipt is indicated without actuating the alarm generator. During the test mode of operation, the alarm control still accepts priority alarm signals from other sending units and generates alarm warnings from the alarm generator. The alarm control also provides alarm warnings from priority alarm signals after disarming signals are received to permit authorized entry, and provides vehicle intrusion warnings unless cancelled by a second coded transmission.
232 Citations
21 Claims
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1. A coded security system comprising:
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a plurality of remote sending means for transmitting coded signals indicative of predetermined conditions at remote locations of a protected area, some of the sending means including sensors for detecting intrusions into the protected area and other of the sending means providing signals indicative of priority emergency conditions; a central alarm station; decoding means for receiving and decoding each of the coded signals at the central alarm station and providing discrete decoded signals identifying the individual predetermined conditions indicated by the coded signals transmitted from the remote sending means; indicating means connected to the decoding means and responsive to each of the discrete signals provided by the decoding means to indicate receipt of a coded signal by the decoding means; alarm means at the alarm station for generating an alarm signal in response to the discrete decoded signals provided by the decoding means; selectively operable testing means at the central alarm station connected to the decoding means for gating the discrete decoded signals identifying intrusions to the alarm means from the decoding means, thereby enabling or disabling the alarm means to respond to the intrusion signals; and circuit means interposed between the decoding means and the alarm means for transmitting the decoded signals identifying priority emergency conditions to the alarm means independently of the testing means whereby the alarm means responds to the priority emergency conditions independently of the testing means and responds the intrusion conditions through the testing means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A coded electronic security system comprising:
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an alarm control station having an alarm signal generator; first signal sending means for transmitting coded intrusion signals to the alarm control station in response to a sensed intrusion; second signal sending means for transmitting coded priority alarm signals to the alarm control station, the code of the priority alarm signals being discriminatingly different from the code of the intrusion signals; electronic decoding means at the alarm control station for receiving the coded signals transmitted by the first and second sending means and for discriminating one coded signal from another and producing decoded intrusion alarm signals and decoded priority alarm signals; visual indicating means connected to the decoding means and responsive to each decoded alarm signal to provide a visual indication that an alarm signal has been received; alarm control means at the alarm control station for actuating the alarm generator including a gating circuit receiving the decoded intrusion sgnals and having a controlled gate selectively actuated to block the intrusion signals or pass the intrusion circuit connected to the alarm generator to actuate the alarm generator in response to a decoded alarm signal, the actuating circuit being connected to the gating circuit to receive the decoded intrusion signal through the controlled gate and being connected to the decoding means to receive the decoded priority alarm signals independently of the gating circuit; and selectively operable means at the alarm control station connected to the controlled gate of the gating circuit blocking or passing the decoded intrusion alarm signal for actuating the controlled gate into the blocking condition while proper functioning of the first signal sending means is being tested, whereby the alarm generator is actuated by the priority alarm signals when decoded regardless of testing and by the intrusion alarm signals when decoded except during testing. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A protective security system comprising:
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first coded transmitting means operable to transmit signals having a first of three signal codes and operable to transmit other signals having a second of the three signal codes; sensing means connecting to a vehicle for detecting an unauthorized intrusion into the vehicle, and connected to the first coded transmitting means to transmit an intrusion signal in the first of the three signal codes; manually operable actuating means also connected to the first coded transmitting means to selectively transmit a signal in the second of the three signal codes; second coded transmitting means operable to transmit priority alarm signals having a third of the three signal codes in the event of a priority alarm condition; receiver means for receiving the transmitted signals in each of the three signal codes and including decoding means producing a decoded intrusion signal in response to an intrusion signal transmitted in the first of the two signal codes, a decoded cancel signal in response to a signal transmitted in the second of the two signal codes and a decoded priority alarm signal in response to a signal transmitted in the third of the three signal codes; alarm signal generating means for producing an alarm signal in response to an energizing signal; time delay means connected to the decoding means to receive a decoded intrusion signal and produce an energizing signal for the alarm signal generating means a predetermined delay period thereafter; inhibiting means operatively associated with the alarm signal generating means and the time delay means and connected to the decoding means to receive a cancel signal for inhibiting the energizing signal for the alarm signal generating means when a cancel signal is received; and priority alarm means connected to the decoding means to receive a decoded priority alarm signal and produce an energizing signal for the alarm signal generating means independently of the time delay means and immediately upon receipt of a decoded priority alarm signal. - View Dependent Claims (15, 16)
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17. A vehicle security system comprising:
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a central alarm control station having an alarm generator for producing a perceptible warning alarm in response to alarm signals received from remote stations; first means operatively associated with a protected vehicle for transmitting an intrusion signal to the central alarm station in response to a sensed intrusion of the vehicle; second means for transmitting a cancel signal from the protected vehicle to the central alarm station, the cancel signal and the intrusion signal being discrete signals manifested by discriminatingly different signal characteristics; third means located at stations remote from the central alarm station for transmitting priority signals indicative of other alarm conditions and having signal characteristics discriminatingly different from the intrusion and cancel signals from the first and second transmitting means; receiver means at the central station for receiving from remote stations a plurality of signals having discriminatingly different characteristics including intrusion, priority alarm and cancel signals, and for producing discrete signals within the central station for each of the signals received from the remote transmitting means; alarm signal generating means at the control station connected with the receiver means and the alarm generator for energizing the generator in response to discrete intrusion signals; inhibiting means at the central alarm station connected with the receiver means for disabling the alarm signal generating means from responding to the discrete intrusion signals in response to discrete cancel signals; and the alarm signal generating means also being responsive to the priority alarm signals to energize the alarm generator independently of the inhibiting means whereby the alarm generator provides a warning alarm in response to priority alarm signals regardless of transmitted cancel signals received at the central alarm control station. - View Dependent Claims (18, 19, 20, 21)
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Specification