Abstract:
The current invention is an automatic AC power interruption system built into a portable power strip or a portable casing or integrated into an appliances control circuitry. The invention monitors the environment for hazard alarms, for example, a T3 signal smoke detector alarm, and responds by tripping open the power supply circuit to the power strip&#39;s receptacles and thus interrupts AC power to the protected appliances the user has chosen to plug into them. One alternate form of the invention uses a portable casing that can be plugged into a power receptacle and, when a hazard alarm is detected, trip off the nearest GFCI. Other alternate forms of the invention are integrated within an individual appliance&#39;s control circuitry and may interrupt power using a built-in switch or by tripping off the nearest GFCI device. The invention&#39;s purpose is to help prevent death, injury, and property damage by preventing fires or facilitating fire suppression; more particularly, by interrupting electrical power to problematic appliances, such as toasters, space heaters, battery chargers, stoves, and motors, when a hazardous condition alarm is emitted. It further interrupts power to the problematic appliances when a detector emits an alarm indicating toxic fumes, natural gas, radon, carbon monoxide, or whatever other detector-alarm the consumer installs in the area to be protected.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    Provisional Application 61/575,177 (Aug. 17, 2011) Donald Randolph Hooper 
     
    
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
       [0002]    Not Applicable 
       REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM LISTING COMPACT DISK APPENDIX 
       [0003]    Not Applicable 
       BACKGROUND OF THE INVENTION 
       [0004]    Wherever electrical circuits provide power to appliances, motors, and other equipment, it is desirable to electronically monitor the environment for hazardous conditions and, when detected, generate an audible alarm to warn people and protect property. For example, smoke detectors generate an audible alarm, but other detectors may warn of toxic fumes, flammable gases, radon, carbon monoxide, fire, or other hazardous conditions. The invention will interrupt electric power to select circuits when it detects a hazardous condition alarm in order to prevent personal injuries, prevent fires, facilitate fire suppression, and protect property. The source of the alarm signal could be any audible, visible or invisible light, radio frequency, or other type signal, or combination of signals, generated by a device tuned to detect the presence of hazardous conditions. The invention may protect a power strip, wall outlet, or electrical panel circuit, or the invention may be integrated into the control circuitry of an individual appliance or machine. 
         [0005]    1. Field of the Invention 
         [0006]    The present invention is in the field of electricity. More particularly, the present invention is in the technical field of electrical safety devices. 
         [0007]    The present invention relates generally to devices that control and distribute alternating current (AC) electric power from receptacles to appliances, motors, or other equipment and, when an alarm signal is detected, automatically interrupt the flow of electric power in order to prevent personal injuries, prevent fires, facilitate fire suppression, and protect property. More particularly, without limiting the scope of the invention&#39;s applications, four embodiments of the invention are:
       FIRST EMBODIMENT: an alarm sensor with circuit interrupter integrated in a power strip   SECOND EMBODIMENT: an alarm sensor and circuit interrupter integrated in an appliance&#39;s control circuitry   THIRD EMBODIMENT: an alarm sensor with control circuit in a portable casing that trips off a Ground Fault Circuit Interrupter (GFCI)   FOURTH EMBODIMENT: an alarm sensor with control circuit integrated in an appliance&#39;s control circuitry that trips off a GFCI       
 
         [0012]    2. Description of Prior Art 
         [0013]    U.S. Pat. No. 5,508,568 issued to Alex Mammen on Apr. 16, 1996, describes a receptacle safety de-energizer that responds to an audible smoke alarm signal by disconnecting power to its one or two receptacles. It is intended to completely cover the existing wall outlet and provide an external appearance similar to that of a standard electrical receptacle. This arrangement has the disadvantage of hiding the original outlet with a seemingly permanent receptacle. The consumer may inadvertently plug in an appliance that is intended to remain fully powered at all times. Also, its appearance may cause the consumer to believe they must purchase an additional unit for every outlet in the building, rather than move a portable unit as needed, thus discouraging its use and safety benefits. This emphasizes the need for a simple portable unit that does not obstruct the user&#39;s choice between an interrupt or non-interrupt circuit receptacle. 
         [0014]    U.S. Pat. No. 7,154,402, issued to Michael Dayoub on Dec. 26, 2006, describes a power strip with a built-in smoke only detector and auto-shutoff, with indicators and switches, all in a single unit. This arrangement requires the power strip be permanently mounted nearby and above the appliance to be monitored for smoke, and additional appliances plugged into its receptacles may not be protected. This emphasizes the need for a simple portable power strip separate from the hazard detector and able to respond to any smoke detector alarm within its range. 
         [0015]    U.S. Pat. App. No. 2008/0018484 Al published for Merrell Sager on Jan. 24, 2008, describes an automatic power interruption system wherein a smoke detector broadcasts a radio frequency (RF) alarm to a remote RF receiver that causes a specific circuit breaker in the electrical panel box to be tripped open. The disadvantages of this arrangement include that power is interrupted to all appliances on the circuit tripped, it requires professional installation, and it is difficult to reset the circuit while monitoring for the defective appliance. This emphasizes the need for a simple portable unit where the appliances, plugs, and reset button are nearby the operator. 
         [0016]    U.S. Pat. No. 7,522,035, issued to InnovAlarm Corp. on Apr. 21, 2009, for a sound monitoring and alarm response method, system and device that detects a variety of smoke alarm signals and generates a wake-up alarm at the consumer&#39;s bedside. The disadvantage of this bedside monitor is that it does not, and is not intended to, interrupt power to any appliance. This emphasizes the need for a simple portable unit to automatically interrupt power (an ignition source) to specific appliances and circuits at any time of day or night when a hazard alarm is emitted. 
         [0000]    This emphasizes the need for a simple portable unit where the appliances, plugs, and reset button are nearby the operator. 
         [0017]    U.S. Pat. No. 7,522,035, issued to InnovAlarm Corp. on Apr. 21, 2009, for a sound monitoring and alarm response method, system and device that detects a variety of smoke alarm signals and generates a wake-up alarm at the consumer&#39;s bedside. The disadvantage of this bedside monitor is that it does not, and is not intended to, interrupt power to any appliance. This emphasizes the need for a simple portable unit to automatically interrupt power (an ignition source) to specific appliances and circuits at any time of day or night when a hazard alarm is emitted. 
       SUMMARY OF THE INVENTION 
       [0018]    The FIRST EMBODIMENT of the invention is a power strip casing and internal components that cut off alternating current (AC) electrical power to its receptacles when a hazard alarm is detected. During normal operation, power flows through the power strip to the user AC outlets and then to whatever appliances are plugged in. When an alarm signal from a hazard detector is sensed, the control circuitry shuts off power to all outlet receptacles on the power strip until the user manually resets the device. The first embodiment of the invention does not require the AC receptacle into which it is plugged be protected with any type of GFCI device. 
         [0019]    The SECOND EMBODIMENT of the invention integrates the invention into the control circuitry of an appliance, machine or other equipment. During normal operation, power flows to an appliance, machine, or other equipment and, when a hazard alarm is sensed, the invention initiates a controlled shutdown and power cut off. The second embodiment of the invention does not require the AC circuit with which it is connected be protected with any type of GFCI device. 
         [0020]    The THIRD EMBODIMENT of the invention is a small portable casing with internal components, openings, and a standard three-prong electrical plug, which can be plugged into a power strip, wall outlet, or other electrical receptacle. During normal operation, power flows to whatever appliances are plugged into a power strip, wall outlet, or other receptacle, including the invention. When the invention senses a hazard alarm, it creates an amperage variance sufficient to trip off the nearest GFCI, which cuts off AC electrical power to all appliances plugged into the corresponding power strip, wall outlet, or electrical panel. AC power is restored to the receptacles by the consumer pressing the affected GFCI&#39;s reset button. The third embodiment of the invention requires the AC circuit into which it is plugged be protected with a standard GFCI device. 
         [0021]    The FOURTH EMBODIMENT of the invention integrates the invention into the control circuitry of an appliance, machine or other equipment. During normal operation, power flows to an appliance, machine, or other equipment and, when a hazard alarm is sensed, the invention initiates a controlled shutdown and then generates an amperage variance to trip off the nearest GFCI. The fourth embodiment of the invention requires the AC circuit into which it is plugged be protected with a standard GFCI device. 
         [0022]    In all embodiments of the invention, the hazard alarm signal sensor typically monitors for an audible smoke detector alarm, but may detect any audible, visible or invisible light, radio frequency, or other type of signal, or combination of signals, generated by a device tuned to detect the presence of hazardous conditions. In addition, the alarm sensor may be adjustable to respond to whatever frequency or pattern the hazard alarm emits. 
         [0023]    The first embodiment (power strip, no GFCI) and third embodiment (portable casing, GFCI) of the invention have these new features: 
         [0024]    The first embodiment (power-strip) and third embodiment (portable casing) of the invention have these new features: 
         [0025]    The invention is simple; that is, it can be unplugged from one outlet and, moved, and plugged into another outlet, ready to respond to hazard alarm signals in the new environment. 
         [0026]    The invention only operates on appliances the user chooses to plug into its power-strip, wall outlet or electrical panel; the invention neither hides nor obstructs other unused wall outlets, thus providing the user a choice of AC power sources. 
         [0027]    It supports the existing features of the outlet into which it is plugged; that is, it will not interfere with the normal operations of the source outlet, such as ground fault interrupt, arc fault circuit breaker, surge protection, uninterruptable power supply, and power overload circuit breaker. 
         [0028]    The invention responds to all types of hazard alarms within its range that match its hazard alarm definitions. 
         [0029]    When the invention has interrupted power to its receptacles, the user can plainly see which appliances are plugged into the invention in order to determine which, if any, created smoke or other fumes and thus caused the pre-existing hazard detector to emit its hazard alarm. The second embodiment (integrated, no GFCI) and fourth embodiment (integrated, GFCI) of the invention have these new features: 
         [0030]    It responds to all types of hazard alarms within its range that match its hazard alarm definition. 
         [0031]    The invention interrupts power to the appliance, machine or other equipment until the user is satisfied that it is not the cause of the alarm or until it is repaired and the user must manually reset the power. 
         [0032]    The invention can be incorporated within particular models of appliances, machines, or other equipment as a built-in safety feature. 
         [0033]    These and other features of the present invention will become readily apparent upon further review of the following specification and drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0034]      FIG. 1  is an external illustration of the housing, commonly referred to as a power strip, for the invention&#39;s first embodiment. 
           [0035]      FIG. 2  is a block diagram of the electronic flow within the power strip housing for the invention&#39;s first embodiment. 
           [0036]      FIG. 3  is an illustration of the interaction of the hazard-detected signal, or trigger voltage, with the circuit interruption switch to shut off AC power to the receptacles for the invention&#39;s first embodiment. 
           [0037]      FIG. 4  is a perspective external illustration of the portable casing of the invention&#39;s third embodiment. 
           [0038]      FIG. 5  is a block diagram of the electronic flow within the portable casing of the invention&#39;s third embodiment. 
           [0039]      FIG. 6  is a an illustration of the interaction of the hazard-detected signal, or trigger voltage, with the amperage variance switch to trip off GFCI power to the receptacles in the third embodiment of the invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0040]    Referring now to the invention in more detail, in  FIG. 1  there is shown an external illustration of the power strip circuit interrupter. The invention appears much like any power strip with one noticeable difference being an alarm detector access hole  12  on the housing  10  which allows hazard alarm signals into the enclosure for the purpose of audible alarm detection. The invention consists of a housing  10  for electronic components, an AC power cord with male plug  16  to receive supplied AC power  18 , and AC receptacles  14  to provide power to other devices plugged into the invention. 
         [0041]    The preferred embodiment of the housing  10  is a metal box with one or more AC receptacles  14 , such as NEMA 5-15R, for appliances to plug in and receive AC power. The housing  10  contains the main power ON/OFF switch  20  to manually connect or disconnect power to the entire device, including to the receptacles  14  and thus to the consumer attached appliances, not shown. Optionally, the housing  10  may contain a main power ON/OFF indicator light emitting diode (LED) as a separate component  22  or incorporated into the main power ON/OFF switch  20 . The housing  10  contains a manually operated reset switch  24  to re-enable power to the receptacles  14  after power has been interrupted. A hazard condition indicator LED  26  on the housing  10  can be provided to show the AC power circuit to the receptacles  14  is in a tripped, or open, condition due to detection of a hazard alarm. An optional hazard alarm test button  28  to emit an audible alarm may be included. A conventional AC cord with male plug  16  is used to attach the power strip to a standard 120V AC power outlet. It will be obvious to those skilled in the art that the invention can be manufactured to operate with any other AC voltage, including without limitation 220V AC. 
         [0042]    It will be obvious to those skilled in the art that the first embodiment of the invention described above can be modified into the second embodiment as follows: Industry producers may choose to incorporate the circuitry of the first embodiment of the invention into the control circuit of a single device being protected. In this case, the housing would be modified or eliminated entirely and the device housing would be modified to accommodate the invention. This second embodiment would not require the AC circuit with which it is connected be protected with any type of GFCI device. 
         [0043]    It will be obvious to those skilled in the art of making power strip housings that any number or variety of brackets, hooks, slots, or mounting holes, or none at all, can be incorporated into the housing  10  and is nonessential to the invention. Further, the consumer is responsible for placement of the invention within reach of the appliance cords, and any special mounting methods used to locate the housing, or whether it simply lays flat on a counter or floor. It will be obvious to those skilled in the art that the number or configuration of AC receptacles  14  is nonessential to the invention. One or more rows of AC receptacles  14  can be used to accommodate the needs of the industry or consumer. 
         [0044]    It will be obvious to those skilled in the art that industry producers may choose to include surge protection, a ground fault circuit breaker, a main power ON/OFF indicator light  22 , a hazard alarm test button  28 , a ground fault circuit test button, or any other accoutrement common to a power strip, without affecting the novelty of the invention. Moreover, the number, type, or configuration of external lights, buttons, and switches is nonessential to the invention, except that the invention must have at least a main power ON/OFF switch  20 , reset switch  24 , hazard condition indicator LED  26 , and alarm detector access hole  12 . 
         [0045]    Referring now to the invention shown in  FIG. 2  which shows a block diagram of the electronic flow within the power strip, input AC power  18  is routed first through the main power ON/OFF switch  20  and then, if present, through the ground fault circuit breaker and surge protection components  30 . A typical off-the-shelf ground fault circuit breaker  30 , such as Hwawon Electronic&#39;s HW-15-MB, would be suitable, but industry producers could use any ground fault and circuit overload protection that meets their target consumers&#39; needs. 
         [0046]    AC power is conducted to both the hazard alarm detector components  32  and the circuit interrupter switch  34 , which is controlled by the invention&#39;s hazard alarm detector components  32 . In its preferred first embodiment, the circuit interrupter switch  34  is a mechanical relay such as Electronic Inc.&#39;s R25-5A16-120 16 Amp 120V AC SPDT relay, but it could be any other type housing  10  contains a manually operated reset switch  24  to re-enable power to the receptacles  14  after power has been interrupted. A hazard condition indicator LED  26  on the housing  10  can be provided to show the AC power circuit to the receptacles  14  is in a tripped, or open, condition due to detection of a hazard alarm. An optional hazard alarm test button  28  to emit an audible alarm may be included. A conventional AC cord with male plug  16  is used to attach the power strip to a standard 120V AC power outlet. It will be obvious to those skilled in the art that the invention can be manufactured to operate with any other AC voltage, including without limitation 220V AC. housing  10  contains a manually operated reset switch  24  to re-enable power to the receptacles  14  after power has been interrupted. A hazard condition indicator LED  26  on the housing  10  can be provided to show the AC power circuit to the receptacles  14  is in a tripped, or open, condition due to detection of a hazard alarm. An optional hazard alarm test button  28  to emit an audible alarm may be included. A conventional AC cord with male plug  16  is used to attach the power strip to a standard 120V AC power outlet. It will be obvious to those skilled in the art that the invention can be manufactured to operate with any other AC voltage, including without limitation 220V AC. 
         [0047]    It will be obvious to those skilled in the art that the first embodiment of the invention described above can be modified into the second embodiment as follows: Industry producers may choose to incorporate the circuitry of the first embodiment of the invention into the control circuit of a single device being protected. In this case, the housing would be modified or eliminated entirely and the device housing would be modified to accommodate the invention. This second embodiment would not require the AC circuit with which it is connected be protected with any type of GFCI device. 
         [0048]    It will be obvious to those skilled in the art of making power strip housings that any number or variety of brackets, hooks, slots, or mounting holes, or none at all, can be incorporated into the housing  10  and is nonessential to the invention. Further, the consumer is responsible for placement of the invention within reach of the appliance cords, and any special mounting methods used to locate the housing, or whether it simply lays flat on a counter or floor. It will be obvious to those skilled in the art that the number or configuration of AC receptacles  14  is nonessential to the invention. One or more rows of AC receptacles  14  can be used to accommodate the needs of the industry or consumer. 
         [0049]    It will be obvious to those skilled in the art that industry producers may choose to include surge protection, a ground fault circuit breaker, a main power ON/OFF indicator light  22 , a hazard alarm test button  28 , a ground fault circuit test button, or any other accoutrement common to a power strip, without affecting the novelty of the invention. Moreover, the number, type, or configuration of external lights, buttons, and switches is nonessential to the invention, except that the invention must have at least a main power ON/OFF switch  20 , reset switch  24 , hazard condition indicator LED  26 , and alarm detector access hole  12 . 
         [0050]    Referring now to the invention shown in  FIG. 2  which shows a block diagram of the electronic flow within the power strip, input AC power  18  is routed first through the main power ON/OFF switch  20  and then, if present, through the ground fault circuit breaker and surge protection components  30 . A typical off-the-shelf ground fault circuit breaker  30 , such as Hwawon Electronic&#39;s HW-15-MB, would be suitable, but industry producers could use any ground fault and circuit overload protection that meets their target consumers&#39; needs. 
         [0051]    AC power is conducted to both the hazard alarm detector components  32  and the circuit interrupter switch  34 , which is controlled by the invention&#39;s hazard alarm detector components  32 . In its preferred first embodiment, the circuit interrupter switch  34  is a mechanical relay such as Electronic Inc.&#39;s R25-5A16-120 16 Amp 120V AC SPDT relay, but it could be any other type of electronically controlled switch. When the circuit interrupter switch  34  is in the closed state, AC power is conducted through the circuit interrupter switch  34  to the AC Receptacles  14 . When the hazard alarm detector components  32  detect a hazard alarm signal, power is supplied to the hazard indicator led  26  and a hazard detected signal  36  is transmitted to the circuit interrupter switch  34 , opening the switch and preventing AC power from reaching the ac receptacles. 
         [0052]    It will be obvious to those skilled in the art that a variety of placement strategies and electromagnetic shielding can be used in the preferred embodiment to protect electrical components from disruptive electrical fields generated during the relay&#39;s switch action without affecting the invention. 
         [0053]    It will also be obvious to those skilled in the art that the first embodiment of the invention described above can be modified into the second embodiment as follows: Industry producers may choose to incorporate the circuitry of the first embodiment of the invention into the control circuit of a single device being protected. In this case, the housing would be modified or eliminated entirely and the device housing would be modified to accommodate the invention. This second embodiment would not require the AC circuit with which it is connected be protected with any type of GFCI device. 
         [0054]    Now referring to the invention shown in  FIG. 3 , which is an illustration of the interaction of the hazard-detected signal  36 , or trigger voltage, with the circuit interrupter switch  34 . The hazard alarm detector components  32  draw AC power for hazard signal detection and logic purposes. In its preferred embodiment, hazard alarm detector  32  components are constituted by a microphone  38  and an application integrated circuit  40  (not shown) or, in the alternative, a field programmable gate array (FPGA)(not shown). The application integrated circuit  40 , or FPGA, is a commercially available integrated circuit which amplifies the current from the microphone  38  and executes its algorithm to determine whether to output the alarm condition to the hazard condition indicator LED  26 , the circuit interrupter switch  34 , or other electrical devices. The application integrated circuit  40 , or FPGA, algorithm shall be programmable to detect the Temporal 3, or T3, signal pattern described in ANSI standard S3.42 1990, at all audible frequencies, including 3100 Hz and 520 Hz. The application integrated circuit  40  may optionally include a manual control to adjust which alarm frequency constitutes a hazardous alarm signal. 
         [0055]    For example, the Alarm sensor, U.S. Pat. No. 7,477,144, currently incorporated in the Lifetone Bedside Fire Alarm Clock, may be used as the hazard alarm detector components  32  to produce the hazard-detected (trigger) signal  36  because it is specifically tuned to recognize and react to both the common 3100 Hz smoke detector signal and the T3 520 Hz acoustic pattern signal at all audible frequencies. 
         [0056]    When the application integrated circuit  40 , or FPGA, determines that a hazardous condition alarm has been detected, it sends a hazard-detected signal  36 , or trigger voltage, to the circuit interrupter switch  34  to open, which interrupts the flow of AC power to the AC receptacles  14 . 
         [0057]    It will be obvious to those skilled in the art that the hazardous alarm signal detection technology selected is immaterial to the patent. In its preferred first embodiment as described above, the method is detection of audible frequencies with a microphone  38  and amplification and analysis by an application integrated circuit  40 , or FPGA. The invention could exploit other technologies, whether in existence and unknown to the invention or those developed or improved in the future, without affecting the novelty of the invention. 
         [0058]    The advantages of the present first embodiment of the invention include, without limitation, it is simple to install and operate, it is portable, it only operates on the appliances the user chooses to plug into its receptacles, it does not hide or obstruct wall outlets, it does not interfere with existing features of the AC power source outlet, it responds to all audible hazard alarm signals that match its definitions, and the user can plainly see and test all of the appliances plugged into the device. 
         [0059]    The advantages of the second embodiment of the invention include, without limitation its is integrated into the electronic controls of an, appliance, machine or other equipment, it does not interfere with the existing features of the AC power source, it responds to all hazard alarm signals that match its definitions and the operator or technician can plainly inspect and test the appliance, machine or other equipment prior to resetting AC power to the control electronics. Referring now to the third embodiment of the invention in more detail, in  FIG. 5  there is shown a perspective view external illustration of the Sensor-Activated Circuit Interrupter&#39;s portable casing  42 . The casing&#39;s  42  dimensions are not critical except that it must hold all the required components and not obstruct adjacent receptacles when plugged into a power strip.  FIG. 5  shows a typical placement of the standard three-prong plug  44 , which includes hot, neutral, and ground prongs on the bottom of the casing  42 . The main power ON indicator LED  46  and alarm detector access hole  48  are best located on the top surface of the casing  42 ; i.e., on the surface opposite from the standard three-prong plug  44 . This arrangement facilitates visual inspection of the main power ON indicator LED  46  by the user and unobstructed reception of alarm signals into the alarm detector access hole  48 . The alarm detector access hole  48  allows hazard alarm signals into the enclosure for detection by the hazard alarm detector components  50 , not shown. The main power ON indicator LED  46  simply indicates that AC power is being supplied to the unit through the standard three-prong plug  44  and a no-light condition means the unit is either not plugged in or no power is available at the receptacle. Turning the unit on or off is accomplished by the user manually plugging or unplugging the unit from an AC power source  56 , not shown. The invention is tested by the consumer manually activating the hazard alarm test button, not shown; e.g., on a smoke detector, and observing the main power ON indicator LED  46  turns off and AC power  56  is not available to the targeted appliances. The invention is reset by the consumer manually pressing the GFCI&#39;s reset button, not shown, on the affected power strip, wall outlet, or electrical panel. 
         [0060]    It will be obvious to those skilled in the art that the invention can be manufactured to operate with any other AC voltage, including without limitation 220V AC. 
         [0061]    It will be obvious to those skilled in the art of making electrical component casings that any number or variety of brackets, hooks, slots, holes, or none at all, can be incorporated into the portable casing  42  and is nonessential to the invention. Moreover, the number, type, or configuration of external lights, buttons, and switches is nonessential to the invention, except that the third embodiment of the invention must have at least a standard three-prong plug  44 , a, main power ON indicator LED  46 , and an alarm detector access hole  48 . 
         [0062]    It will be obvious to those skilled in the art that the third embodiment of the invention described above can be modified into the fourth embodiment as follows: Industry producers may choose to incorporate the circuitry of the third embodiment of the invention into the control circuit of a single device being protected. In this case, the housing would be modified or eliminated entirely and the device housing would be modified to accommodate the invention. This fourth embodiment would require the AC circuit with which it is connected be protected with a standard GFCI device. 
         [0063]    Referring now to the third embodiment of the invention in more detail, in  FIG. 6  there is shown a block diagram of the electronic flow within the portable casing  42 . Input AC power  56  is routed from the standard three-prong plug  44 , shown in  FIG. 5 , through the main power ON LED  46  to the hazard alarm detector components  50 , which includes a microphone  60 , not shown, or other signal detector for audible, visible or invisible light, radio frequency, or other type of hazard alarm signal. When a matching signal is detected, the application integrated circuit  52  generates a hazard detected signal  58  that triggers the amperage variance switch  54  to generate an amperage variance back to the AC power  56  source sufficient to trip off the nearest GFCI, not shown. This embodiment requires a GFCI device in the consumer&#39;s AC power circuit, either in a power strip, wall outlet, or other receptacle connected to the electrical panel. 
         [0064]    Now referring to the invention shown in  FIG. 7 , which is an illustration of the interaction of the hazard-detected signal  58  with the amperage variance switch  54 . The hazard alarm detector components  50  draw AC power  56  for hazard signal detection and logic purposes. In its preferred embodiment, the hazard alarm detector components  50  are constituted by a microphone  60 , not shown, and an application integrated circuit  52  or, in the alternative, a field programmable gate array (FPGA). The application integrated circuit  52 , or FPGA, is a commercially available integrated circuit which amplifies the current from the microphone  60  and executes its algorithm to determine whether to output a hazard detected signal  58  to the amperage variance switch  54 , or not. When the application integrated circuit  52 , or FPGA, determines that a hazardous condition alarm has been detected, it sends a hazard-detected (trigger) signal  58 , or trigger voltage, to the amperage variance switch  54  to generate an amperage variance back to the AC power  56  source sufficient to trip off the nearest GFCI, not shown. The application integrated circuit  52 , or FPGA, algorithm shall be programmable to detect the Temporal 3, or T3, signal pattern described in ANSI standard 53.42 1990, at all audible frequencies, including 3100 Hz and 520 Hz. The application integrated circuit  52  may optionally include a manual control to adjust which alarm frequency constitutes a hazardous alarm signal. 
         [0065]    It will be obvious to those skilled in the art that the hazardous alarm signal detection technology selected is immaterial to the patent. In its preferred third embodiment as described above, the method is detection of audible frequencies with a microphone  60  and amplification and analysis by an application integrated circuit  52 , or FPGA. The invention could exploit other technologies, whether in existence and unknown to the invention or those developed or improved in the future, without affecting the novelty of the invention. 
         [0066]    The advantages of the present invention include, without limitation, it is simple to install and operate, it is portable, or is integrated into the appliance, it only operates on the appliances the user chooses to plug into the nearest GFCI circuit, it does not hide or obstruct wall outlets, it does not interfere with existing features of the AC power source outlet, it responds to all audible hazard alarm signals that match its definitions, and the user can plainly see and test all of the appliances plugged into the common GFCI circuit. 
         [0067]    In broad embodiment, the present invention is a sensor that may detect hazard alarm signals of any type, but typically a smoke detector alarm signal, and, when detected, interrupts AC power to a specific circuit. In the first embodiment, the invention is integrated into a power strip and uses its built-in switch to interrupt power to all appliances plugged into its receptacles. In the second embodiment, the invention is integrated into an individual appliance&#39;s control circuitry and uses its built-in switch to interrupt power to that one appliance. In the third embodiment, the invention is in a portable casing that can be plugged into a typical GFCI receptacle and interrupts power by tripping off the GFCI. In the fourth embodiment, the invention is integrated into an individual appliance&#39;s control circuitry and interrupts power by tripping off the nearest GFCI 
         [0068]    In broad embodiment, the present invention is a signal activated circuit interrupter that allows AC power to flow to one or more outlet receptacles during normal operation, but interrupts the power when an audible or other hazard alarm signal is emitted by a variety of hazardous condition detectors, for example, a smoke detector. The invention can be incorporated into a power strip, a portable casing, or integrated into an appliance&#39;s control circuitry. 
         [0069]    While the foregoing written description of the invention enables one of ordinary skill to make and use what is considered presently to be the best mode thereof, those with ordinary skill will understand and appreciate the existence of variations, combinations, and equivalents of the specific embodiment, method, and examples herein. The invention should therefore not be limited by the above described embodiment, method, and examples, but by all embodiments and methods within the scope and spirit of the invention.