Electric stove warning system
First Claim
1. A system for use with a building having a door in which there is a stove within the building having an on-condition and an off-condition, said system warning that said stove is in said on-condition to a user exiting said building, said system comprising:
- a sensor for generating a first electrical signal responsive to said on-condition of said stove;
comparing means in electrical connection with said sensor for comparing said first electrical signal with a preselected value to determine if said first electrical signal is greater than said preselected value, said first electrical signal being greater than said preselected value when said stove is in said on-condition and less than said preselected value when said stove is in said off-condition, said comparing means issuing a second electrical signal when said stove is in said on-condition;
detecting means for detecting when said user is exiting said building and issuing a third electrical signal when said user is exiting said building; and
indicating means responsive to said first and said third electrical signals from said sensing means and said detecting means, said indicating means for indicating to said user when said user is exiting said building that said stove is in said on-condition.
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Accused Products
Abstract
A fire-preventing warning system for alerting an occupant leaving the premises that a stove burner is on, includes (a) a sensor to detect whether a gas or electric stove is "on", connected to (b) a warning indicator located by the exit door. If the stove burner is on, the warning indicator will light up, or, in the alternative, emit an audible warning, or both, as the door is opened. The sensor and the indicator circuitry may be connected by electrical conductors or by radio frequency transmission; the system may be battery-operated or powered from household current.
49 Citations
26 Claims
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1. A system for use with a building having a door in which there is a stove within the building having an on-condition and an off-condition, said system warning that said stove is in said on-condition to a user exiting said building, said system comprising:
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a sensor for generating a first electrical signal responsive to said on-condition of said stove; comparing means in electrical connection with said sensor for comparing said first electrical signal with a preselected value to determine if said first electrical signal is greater than said preselected value, said first electrical signal being greater than said preselected value when said stove is in said on-condition and less than said preselected value when said stove is in said off-condition, said comparing means issuing a second electrical signal when said stove is in said on-condition; detecting means for detecting when said user is exiting said building and issuing a third electrical signal when said user is exiting said building; and indicating means responsive to said first and said third electrical signals from said sensing means and said detecting means, said indicating means for indicating to said user when said user is exiting said building that said stove is in said on-condition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for use with a building having a door and an electrical stove, said electrical stove having an electrical conductor and an on-condition and an off-condition, said system warning a user exiting said building that said electrical stove is in said on-condition, said system comprising:
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an electrical current sensor in electrical connection with said electrical conductor, said electrical current sensor issuing a first electrical signal related to the electrical current drawn in said electrical conductor; comparing means in electrical connection with said electrical current sensor for comparing said first signal with a preselected value to determine if said first electrical signal is greater than said preselected value, said first electrical signal being greater than said preselected value when said electrical stove is in said on-condition and less than said preselected value when said electrical stove is in said off-condition, said comparing means issuing a second electrical signal when said electrical stove is in said on-condition; detecting means for detecting when said user is exiting said door, said detecting means generating a third electrical signal when said user is exiting said door; and an indicator in electrical connection with said detecting means and located proximate to said door, said indicator visually indicating to said user, as said user is exiting said building through said door, that said electrical stove is in said on-condition. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system for use with a building having a door and a gas stove, said gas stove having a gas supply pipe through which gas flows at a flow rate, and an on-condition and an off-condition, said system warning a user exiting said building that said gas stove is in said on-condition, said system comprising:
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sensing means in fluid communication with said gas supply pipe for sensing said flow rate of said gas in said gas supply pipe, said sensing means issuing a first electrical signal related to said flow rate of said gas in said gas supply pipe; comparing means in electrical connection with said sensing means for comparing said first electrical signal with a preselected value to determine if said first electrical signal is greater than said preselected value, said first electrical signal being greater than said preselected value when said gas stove is in said on-condition and less than said preselected value when said gas stove is in said off-condition, said comparing means issuing a second electrical signal when said gas stove is in said on condition; detecting means for detecting when said user is exiting said door, said detecting means generating a third electrical signal when said user is exiting said door; and an indicator in electrical connection with said detecting means and located proximate to said door, said indicator indicating to said user, as said user is exiting said building through said door, that said gas stove is in said on-condition. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A system for use with a building in which there is a stove having an on-condition and an off-condition, said system warning that said stove is in said on-condition to a user exiting said building through a door, said system comprising:
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a sensor for generating a first electrical signal responsive to said on-condition of said stove; and comparing means in electrical connection with said sensor for comparing said electrical signal with a preselected value to determine if said electrical signal is greater than said preselected value, said electrical signal being greater than said preselected value when said stove is in said on-condition and less than said preselected value when said stove is in said off-condition, said comparing means issuing said electrical signal to said indicating means when said electrical signal is greater than said preselected value; and indicating means proximate to said door and responsive to said electrical signal from said sensor, said indicating means for indicating to said user when said user is exiting said building that said stove is in said on-condition. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification