Home security system for detecting an intrusion into a monitored area by an infrared detector
First Claim
1. A security system for a home or the like comprising:
- an intrusion detector to be set in an area of said home or the like to be protected, said intrusion detector comprising;
means for generating an intrusion signal in response to an intrusion into said area;
means for storing the intrusion signal and for transmitting a radio signal only upon actuation by receipt of a predetermined radio signal;
means for modulating said radio signal for a predetermined time after the receipt of said intrusion signal; and
time delay means for delaying the actuation of said intrusion detector to allow a person sufficient time to exit said area to be protected after setting said intrusion detector; and
a portable receiver comprising;
means for generating said predetermined radio signal to activate said radio signal from said intrusion detector and for generating an output signal in response to said radio signal from said intrusion detector; and
display means for generating a visual display indicating an intrusion has occurred in response to said output signal.
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Accused Products
Abstract
A security system includes an intrusion detector having a transmitter coupled with a portable receiver to alert a homeowner or the like that an intrusion has taken place or occurred within a pre-set time period. The area under surveillance is monitored by an infrared detector which activates the transmitter upon the receipt of abrupt differences in infrared radiation levels, associated with the presence of a warm body in an otherwise equilibrated environment. A radio signal is emitted by the transmitter upon activation by a transmitter-receiver carried by the homeowner or the like as he/she approaches the protected area. The radio signal from the transmitter is received by the portable remote transmitter-receiver. A first signal, indicating that an intrusion has been detected in the monitored areas, is displayed on the receiver for a preselected period of time. After the preselected period of time has elapsed, a second signal is generated to indicate that the intrusion took place at a time greater than the preselected period of time. The first signal indicates that the intrusion is recent and that the probability of the intruder still being present is great. Once the intrusion detector is activated, the signal is stored until transmission is requested by the portable receiver and then transmitted continuously until the intrusion detector has been reset.
189 Citations
19 Claims
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1. A security system for a home or the like comprising:
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an intrusion detector to be set in an area of said home or the like to be protected, said intrusion detector comprising; means for generating an intrusion signal in response to an intrusion into said area; means for storing the intrusion signal and for transmitting a radio signal only upon actuation by receipt of a predetermined radio signal; means for modulating said radio signal for a predetermined time after the receipt of said intrusion signal; and time delay means for delaying the actuation of said intrusion detector to allow a person sufficient time to exit said area to be protected after setting said intrusion detector; and a portable receiver comprising; means for generating said predetermined radio signal to activate said radio signal from said intrusion detector and for generating an output signal in response to said radio signal from said intrusion detector; and display means for generating a visual display indicating an intrusion has occurred in response to said output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A security system comprising
an intrusion detector to be set in an area to be protected which when activated will initiate an alarm sequence, said intrusion detector having intrusion detector means for detecting an intrusion, transmitter means for transmitting a radio signal indicative of said intrusion detection in response to activation by receipt of a transmitted radio signal of a predetermined frequency, and timing means activated by said intrusion detector means, said timing means including means for modulating said radio signal transmitted by said transmitter means to produce a modulated radio signal for a preselected period of time after said intrusion detector detects an intrusion; - and
a portable receiver including means to transmit said radio signal for receipt by said transmitter means and responsive to said modulated radio signal from said transmitter means to generate a first visual signal and responsive to said signal transmitted by said transmitter means after said preselected period of time to generate a second visual signal. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification