Home security system for detecting an intrusion into a monitored area by an infrared detector
First Claim
1. A security system for a home comprising:
- a free standing intrusion detector to be set in an area of said home to be protected, said free standing intrusion detector comprising;
an intrusion detector to generate an intrusion signal in response to an intrusion into said area;
a radio signalling transmitter responsive to said intrusion signal to transmit a radio signal;
means for modulating said radio signal for a predetermined time in response to 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 adapted to be hand carried comprising;
means for generating an output signal in response to said radio signal; and
display means for generating a visual display indicating an intrusion has occured in response to said output signal.
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Accused Products
Abstract
A security system has a flee-standing intrusion detector. The free standing intrusion detector has a transmitter coupled with a portable receiver to alert a homeowner 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 detection 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 which is received by the portable hand-held remote receiver. A first signal, indicating that an intrusion has been detected less than a preselected period of time in the past in the monitored areas, is displayed on the receiver for that 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 in the past and that the probability of the intruder still being present is less. Once the intrusion detector is activated, the signal is continuously transmitted to the portable receiver until the intrusion detector has been reset.
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Citations
19 Claims
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1. A security system for a home comprising:
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a free standing intrusion detector to be set in an area of said home to be protected, said free standing intrusion detector comprising; an intrusion detector to generate an intrusion signal in response to an intrusion into said area; a radio signalling transmitter responsive to said intrusion signal to transmit a radio signal; means for modulating said radio signal for a predetermined time in response to 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 adapted to be hand carried comprising; means for generating an output signal in response to said radio signal; and display means for generating a visual display indicating an intrusion has occured 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 home security system comprising:
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a free-standing 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 all intrusion, transmitter means for transmitting a radio signal in response to said intrusion detection, 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 and intrusion; and a portable receiver adapted to be hand carried by a home owner, said portable receiver responsive to said modulated radio signal to generate a first visual signal and responsive to said radio signal transmitted 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