Solid state security system
First Claim
1. A solid state security system for monitoring alarm conditions, such as fire and intrusion, comprising, at least one fire sensor circuit for generating output signals in response to a fire alarm condition and in response to a fire circuit trouble condition corresponding to a circuit or component malfunction,at least one intrusion sensor circuit for generating output signals in response to an intrusion alarm condition and in response to an intrusion circuit trouble condition corresponding to a component or circuit malfunction,primary electronics comprising:
- digital pulse wave excitation means,fire input circuit means including comparator circuit means for comparing the output signals from said fire sensor circuit to predetermined references indicative of a fire alarm condition and a fire circuit trouble condition, and producing a fire alarm signal in response to a fire sensor circuit output indicative of a fire alarm condition and a fire circuit trouble signal in response to a fire circuit trouble condition,intrusion input circuit means including comparator circuit means for comparing the output signals from said intrusion sensor circuit to predetermined references indicative of an intrusion alarm condition and an intrusion circuit trouble condition, and producing an intrusion alarm signal in response to an intrusion sensor circuit output indicative of an intrusion alarm condition and an intrusion circuit trouble signal in response to an intrusion circuit trouble condition,resettable latching circuit means connected to said fire and intrusion input circuit means and responding to said fire alarm signal and intrusion alarm signal by maintaining a digital output signal indicative of said fire and intrusion alarm signals,digital noise generator circuit means operatively connected to said latching circuit means and driven by said digital pulse wave excitation means for initiating distinctively different digitally modulated, frequency modulated digital audio waveforms in response to said fire and intrusion alarm signals, respectively,trouble indicator circuit means operatively connected between said fire and intrusion input circuit means and said digital noise generator circuit means to initiate a digitally modulated, frequency modulated digital audio waveform from said digital noise generator circuit means distinctly indicative of a fire circuit trouble condition in response to a fire circuit trouble signal, and to initiate a digitally modulated, frequency modulated digital audio waveform from said noise generator circuit means distinctively indicative of an intrusion circuit trouble condition in response to an intrusion circuit trouble signal, andaudio means operatively connected to said digital noise generator circuit means to manifest said digitally modulated frequency modulated digital audio waveforms.
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Accused Products
Abstract
A security system adapted for monitoring fire, intrusion, and other alarm conditions employs solid state technology to appropriately identify the monitored alarm conditions and initiate appropriate responses. A "one chip" integrated semiconductor circuit functions as the primary electronics of a master control console to accept both remotely initiated as well as locally initiated input signals and to process the signals and initiate appropriate control and alarm signals. Included on the integrated semiconductor circuit are a digital noise generator circuit, input comparator and latch circuits, system test and reset circuits, and logic circuits for developing digital output signals to both activate monitoring channels and identify the type of alarm condition present.
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Citations
11 Claims
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1. A solid state security system for monitoring alarm conditions, such as fire and intrusion, comprising, at least one fire sensor circuit for generating output signals in response to a fire alarm condition and in response to a fire circuit trouble condition corresponding to a circuit or component malfunction,
at least one intrusion sensor circuit for generating output signals in response to an intrusion alarm condition and in response to an intrusion circuit trouble condition corresponding to a component or circuit malfunction, primary electronics comprising: -
digital pulse wave excitation means, fire input circuit means including comparator circuit means for comparing the output signals from said fire sensor circuit to predetermined references indicative of a fire alarm condition and a fire circuit trouble condition, and producing a fire alarm signal in response to a fire sensor circuit output indicative of a fire alarm condition and a fire circuit trouble signal in response to a fire circuit trouble condition, intrusion input circuit means including comparator circuit means for comparing the output signals from said intrusion sensor circuit to predetermined references indicative of an intrusion alarm condition and an intrusion circuit trouble condition, and producing an intrusion alarm signal in response to an intrusion sensor circuit output indicative of an intrusion alarm condition and an intrusion circuit trouble signal in response to an intrusion circuit trouble condition, resettable latching circuit means connected to said fire and intrusion input circuit means and responding to said fire alarm signal and intrusion alarm signal by maintaining a digital output signal indicative of said fire and intrusion alarm signals, digital noise generator circuit means operatively connected to said latching circuit means and driven by said digital pulse wave excitation means for initiating distinctively different digitally modulated, frequency modulated digital audio waveforms in response to said fire and intrusion alarm signals, respectively, trouble indicator circuit means operatively connected between said fire and intrusion input circuit means and said digital noise generator circuit means to initiate a digitally modulated, frequency modulated digital audio waveform from said digital noise generator circuit means distinctly indicative of a fire circuit trouble condition in response to a fire circuit trouble signal, and to initiate a digitally modulated, frequency modulated digital audio waveform from said noise generator circuit means distinctively indicative of an intrusion circuit trouble condition in response to an intrusion circuit trouble signal, and audio means operatively connected to said digital noise generator circuit means to manifest said digitally modulated frequency modulated digital audio waveforms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification