# US 7,746,240 B2 · Sensing system and components for detecting and remotely monitoring carbon monoxide in a space of concern > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,746,240 B2 - Document ID: US7746240B2 - Status: Granted - Kind: B2 - Application number: 11/288,716 - Filed: 2005-11-29 - Published: 2007-05-31 - Granted: 2010-06-29 - Earliest claimed: 2005-11-29 - Assignees: Guardian, LLC - Inventors: Ashok K. Vij - Web page: https://patentgrep.com/patent/US7746240B2 ## CPC - G08B 21/14: Toxic gas alarms (G08B21/16 takes precedence) - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS ## Abstract A sensing device for detecting the presence of carbon monoxide in a selected space of concern and communicating with a remote monitoring device is provided. The sensing device comprises (a) a detection device configured to sense the presence of carbon monoxide in the selected space of concern, (b) a monitoring device remote from the detection device, for communicating information to an operator, and (c) the detector in circuit communication with the monitoring device, to transmit information from the detection device to the monitoring device that is related to carbon monoxide in the selected space. According to one preferred embodiment, the sensing device is designed for an aircraft. The remote monitoring device is the multifunctional display of the aircraft cockpit. In addition, in a preferred embodiment, a reset/retest actuator is connected with the multifunctional display, and is in circuit communication with the detection device. The reset/retest actuator is selectively actuated from the multifunctional display to send a reset/retest signal to the detection device, to reset the detection device, and to initiate operation of the detection device to repeat its carbon monoxide detection process and provide a signal related to the level of carbon monoxide detected by the detection device. Moreover, in a preferred embodiment, a heating element is provided that is proximate to the carbon monoxide detection component. The heating element is selectively actuated to heat the air space about the carbon monoxide detection component. Also, an adjustment device associated with the output of the CO detection device, for adjusting the output of the detection device in response to a signal related to the air pressure in the selected space of concern. These features are particularly useful in a detection device for an aircraft, where ambient temperatures may drop to levels that can adversely affect the performance of the detection device, or where pressure changes in the aircraft may affect the sensitivity of the detection device. ## Claims ### Claim 1 A sensing device for detecting the presence of carbon monoxide in a selected space of concern, comprising (a) a detection device configured to sense the presence of carbon monoxide in the selected space of concern, (b) a monitoring device remote from the detection device, for communicating information to an operator, and (c) the detector in circuit communication with the monitoring device, to transmit information from the detection device to the monitoring device that is related to carbon monoxide in the selected space, wherein the monitoring device comprises a multifunctional display that is configured to display information about the level of carbon monoxide detected by the detection device in a plurality of display formats, the multifunctional display configured to enable a reset/retest of the level of carbon monoxide in the space of concern to be selectively initiated from the multifunctional display to retest and redisplay information about the level of carbon monoxide detected by the detection device in the plurality of display formats. ### Claim 2 (depends on 1) A sensing device as set forth in claim 1, wherein a reset/confirmation actuator is connected with the multifunctional display, and is in circuit communication with the detection device, the reset/confirmation actuator being selectively actuated from the multifunctional display to send a reset/confirmation signal to the detection device, to reset the detection device, and to initiate operation of the detection device to repeat its carbon monoxide detection process and provide a signal related to the level of carbon monoxide detected by the detection device. ### Claim 3 (depends on 2) A sensing device as set forth in claim 2, wherein the detection device includes a CO detection component and a heating element proximate to the detection component, the heating element being selectively actuated to heat the air space about the detection component. ### Claim 4 (depends on 3) A sensing device as set forth in claim 3, including an adjustment device for adjusting the output of the detection device in response to the air pressure in the selected space of concern. ### Claim 5 (depends on 4) A sensing device as set forth in claim 4, wherein the sensing device, including the detection device and the remote multifunctional display, is configured for a vehicle. ### Claim 6 (depends on 4) A sensing device as set forth in claim 4, wherein the sensing device, including the detection device and the remote multifunctional display, is configured for an aircraft. ### Claim 7 (depends on 1) A device as set forth in claim 1, wherein the detection device is configured to communicate with the multifunctional display along an RS232 communication cable. ### Claim 8 (depends on 1) A device as set forth in claim 1, wherein the detection device is configured to output a voltage that is related to the level of carbon monoxide in the selected space of concern. ### Claim 9 (depends on 1) A device as set forth in claim 1, further including an auxiliary device that is in circuit communication with the detection device and is actuated via a communication from the detection device to initiate a function that is related to the detection of carbon monoxide by the detection device; the circuit communication between the detection device and the monitoring device configured to enable the monitoring device to selectively communicate a signal with the detection device that causes the detection device to actuate the auxiliary device to initiate the function. ### Claim 10 A device for detecting the presence of carbon monoxide in a selected space of concern in an aircraft, comprising (a) a detection device configured to sense the presence of carbon monoxide in the selected space of concern, (b) a monitoring device located in a multifunctional display remote from the detection device, for communicating information to an operator of the aircraft, where the multifunctional display is configured to display information about the level of carbon monoxide detected by the detection device in a plurality of display formats related to the detection of carbon monoxide in the selected space, and (c) the detection device in circuit communication with the monitoring device, to transmit information from the detection device to the monitor that is related to carbon monoxide in the selected space, and the multifunctional display configured to enable a reset/retest of the level of carbon monoxide in the space of concern to be selectively initiated from the multifunctional display to retest and redisplay information about the level of carbon monoxide detected by the detection device in the plurality of display formats. ### Claim 11 (depends on 10) A device as set forth in claim 10, wherein a Reset/confirmation actuator is connected with the multifunctional display, and is in circuit communication with the detection device, the reset/confirmation actuator being selectively actuated from the multifunctional display to send a reset/confirmation signal to the detection device, to selectively reset the detection device, and to initiate operation of the detection device to repeat its carbon monoxide detection process and provide a signal related to the level of carbon monoxide detected by the detection device. ### Claim 12 (depends on 11) A device as set forth in claim 11, wherein the detection device includes a carbon monoxide detection component, and a heating element proximate to the carbon monoxide detection component, the heating element being selectively actuated to heat the air space about the carbon monoxide detection component. ### Claim 13 (depends on 12) A device as set forth in claim 12, including an adjustment device associated with the detection device, for accounting for changes in the sensitivity of the detection device in response to changes in the air pressure in the selected space of concern. ### Claim 14 (depends on 10) A device as set forth in claim 10, wherein the sensor is configured to communicate information along an RS232 communication cable. ### Claim 15 (depends on 11) A device as set forth in claim 11, further including an auxiliary device that is in circuit communication with the detection device and is actuated via a communication from the detection device to initiate a function that is related to the detection of carbon monoxide by the detection device; the circuit communication between the detection device and the monitoring device configured to enable the monitoring device to selectively communicate a signal with the detection device that causes the detection device to actuate the auxiliary device to initiate the function. ### Claim 16 (depends on 10) A device as set forth in claim 10, including an electrical power source for detection device, and a communication between the electrical power source and the detection device that is maintained when the aircraft propulsion system is shut down, so that the detection device is kept in an alive condition even when the aircraft propulsion system is shut down. ### Claim 17 A carbon monoxide detection device for connection to a remote monitoring device, comprising a housing that includes (a) a carbon monoxide detection component configured to sense the presence of carbon monoxide and to provide an output related thereto, and (b) a coupling for establishing circuit communication with a remote monitoring device that comprises a multifunctional display that displays information about the level of carbon monoxide detected by the detection device in a plurality of display formats, to enable transmission of information from the carbon monoxide detection component to the monitoring device that is related to carbon monoxide detected by the carbon monoxide detection component and display of the information about the level of carbon monoxide detected by the detection device in the plurality of display formats, and the multifunctional display is configured to enable a reset/retest of the level of carbon monoxide in the space of concern to be selectively initiated from the multifunctional display to retest and redisplay information about the level of carbon monoxide detected by the detection device in the plurality of display formats. ### Claim 18 (depends on 17) A carbon monoxide detection device as set forth in claim 17, wherein the coupling includes an input port for receiving a control signal from the multifunctional display, and the detection device is configured such that on receipt of a reset/confirmation signal at the input port the detection device provides a reset/confirmation function that resets the carbon monoxide detection component, and initiates operation of the carbon monoxide detection component to repeat its carbon monoxide detection process and provide a signal related to the level of carbon monoxide detected by the carbon monoxide detection component. ### Claim 19 (depends on 17) A carbon monoxide detection device as set forth in claim 17, further including a heating element proximate to the carbon monoxide detection component, the heating element being selectively actuatable to heat the air space about the carbon monoxide detection component. ### Claim 20 (depends on 17) A carbon monoxide detection device as set forth in claim 17, including an adjustment device for adjusting the output of the carbon monoxide detection component in response to the air pressure about the carbon monoxide detection component. ### Claim 21 (depends on 17) A carbon monoxide detection device as set forth in claim 17, wherein the coupling includes an input port for receiving a control signal from a remote monitoring device, and the coupling further includes a relay for communicating the carbon monoxide detection device with an auxiliary device to communicate a signal to the auxiliary device to initiate a function that is related to the detection of carbon monoxide by the carbon monoxide detection component; to enable a the monitoring device to selectively communicate a signal with the carbon monoxide detection device that causes the carbon monoxide detection device to transmit a signal to the relay for actuating the auxiliary device to initiate the function. ### Claim 22 (depends on 21) A carbon monoxide detection device as set forth in claim 21, wherein input port of the coupling comprises an RS232 port. ### Claim 23 (depends on 18) A carbon monoxide detection device as set forth in claim 18, wherein input port of the coupling comprises an RS232 port.