Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
A gas and smoke detector system including: (a) at least one sensor means sensitive to a selected gas or smoke, and adapted to provide a sensor current which is a function of the concentration of said gas or smoke; (b) power supply means producing a selected d.c. voltage V; (c) means to apply said voltage V through a first resistor means, through a meter means and through said sensor means to ground; (d) detector means connected to a point in said first resistor means; (e) alarm control means responsive to said detector means, to sound an alarm when said detector means detects the flow of a selected minimum current through said first resistor means and said sensor means; and (f) means to subject said sensor means to said gas to be detected and wherein said system includes (g) a plurality of sensor means; (h) switch means and clock means to control said switch means to sequentially connect each of said plurality of sensor means to said meter means; (i) said clock means responsive to the magnitude of current through said meter means; and (j) means responsive to a selected magnitude of current through said meter means to disable said switch means for a selected period of time; whereby said meter can display the value of current flowing through it.
Claim 2
Dependent Claim
219 words
A gas and smoke detector system including: (a) at least one sensor means sensitive to a selected gas or smoke, and adapted to provide a sensor current which is a function of the concentration of said gas or smoke; (b) power supply means producing a selected d.c. voltage V; (c) means to apply said voltage V through a first resistor means, through a meter means and through said sensor means to ground; (d) detector means connected to a point in said first resistor means; (e) alarm control means responsive to said detector means, to sound an alarm when said detector means detects the flow of a selected minimum current through said first resistor means and said sensor means; and (f) means to subject said sensor means to said gas to be detected and wherein said system includes (g) a plurality of sensor means; (h) switch means and clock means to control said switch means to sequentially connect each of said plurality of sensor means to said meter means; (i) said clock means responsive to the magnitude of current through said meter means; and (j) means responsive to a selected magnitude of current through said meter means to disable said switch means for a selected period of time; whereby said meter can display the value of current flowing through it.
Claim 3
Dependent Claim
27 words
The gas detector system as in claim 1, in which said first resistor means comprises potentiometer means, whereby the threshold of said detector means can be varied.
Claim 4
Dependent Claim
20 words
The gas detector system as in claim 1 in which said alarm control means includes oscillator means and amplifier means.
Claim 5
Dependent Claim
57 words
The system as in claim 1 including counter means responsive to said switch means, said counter means having a count number corresponding to the number of said sensor means which is connected at any selected time, through said meter means and means to display the count number in said counter means when said switch means is disabled.
Claim 6
Dependent Claim
14 words
The system as in claim 1 in which said switch means includes flip-flop means.
Claim 7
Dependent Claim
46 words
The system as in claim 1 in which said meter means is sequentially placed in series with the first, then the second, then the third sensor, and so on, to the Nth sensor, including means to recycle said switch means back to said first sensor means.
Claim 8
Dependent Claim
33 words
The system as in claim 1 in which said sensor means is a solid state sensor means and includes heater means, and means to connect said heater means to said power supply means.