Patents Assigned to National Draeger Incorporated
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Patent number: 6358384Abstract: A gas sensor (8) includes a body (10) that is shaped to define a chamber (14). An electrolyte (34) is contained in the chamber (14) and three electrodes (26, 28 and 30) that are located on an electrode substrate (24) are disposed in contact with the electrolyte. The body (10) is electrically connected to the three electrodes. A cover (36) engages the body (10) to enclose the chamber (14). A resistor array (58a-58n) is located between the cover (36) and the electrode substrate (24). The resistors (58a-58n) are coated with a compound that emits a predetermined gas in response to temperature increase. To test the sensor (8) voltage is selectively applied to the resistor array (58a-58n) to introduce the gas to the gas diffusion path of the sensor (8).Type: GrantFiled: June 20, 2000Date of Patent: March 19, 2002Assignee: National Draeger IncorporatedInventor: Piers Richard Grove Warburton
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Patent number: 5987965Abstract: A gas sensor assembly having a first housing portion having a receptacle formed therein and a second housing portion in the form of a cover. A gas-sensing agent is disposed in the receptacle, and a working electrode, a counter electrode, and a reference electrode provided on a single electrode support sheet are disposed in fluid contact with the gas-sensing agent. The first housing portion is provided with three conductive housing portions which are in electrical contact with the three electrodes, and the cover maintains pressurized contact between the three conductive housing portions and the three corresponding electrodes. The gas sensor may be provided with two different types of leakage detectors to sense leakage of the gas-sensing agent from the sensor.Type: GrantFiled: October 14, 1998Date of Patent: November 23, 1999Assignees: J and N Associates, Inc., National Draeger IncorporatedInventors: Dennis Martell, Richard Grove Warburton, Laura Ann Lindner, Juergen Lindner
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Patent number: 5827948Abstract: A gas sensor assembly having a first housing portion having a receptacle formed therein and a second housing portion in the form of a cover. A gas-sensing agent is disposed in the receptacle, and a working electrode, a counter electrode, and a reference electrode provided on a single electrode support sheet are disposed in fluid contact with the gas-sensing agent. The first housing portion is provided with three conductive housing portions which are in electrical contact with the three electrodes, and the cover maintains pressurized contact between the three conductive housing portions and the three corresponding electrodes. The gas sensor may be provided with two different types of leakage detectors to sense leakage of the gas-sensing agent from the sensor.Type: GrantFiled: July 8, 1997Date of Patent: October 27, 1998Assignees: J and N Associates, Inc., National Draeger IncorporatedInventors: Dennis Martell, Richard Grove Warburton, Laura Ann Lindner, Juergen Lindner
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Patent number: 5777208Abstract: A gas sensor assembly having a first housing portion having a receptacle formed therein and a second housing portion in the form of a cover. A gas-sensing agent is disposed in the receptacle, and a working electrode, a counter electrode, and a reference electrode provided on a single electrode support sheet are disposed in fluid contact with the gas-sensing agent. The first housing portion is provided with three conductive housing portions which are in electrical contact with the three electrodes, and the cover maintains pressurized contact between the three conductive housing portions and the three corresponding electrodes. The gas sensor may be provided with two different types of leakage detectors to sense leakage of the gas-sensing agent from the sensor.Type: GrantFiled: October 22, 1996Date of Patent: July 7, 1998Assignees: J and N Associates, Inc., National Draeger IncorporatedInventors: Dennis Martell, Richard Grove Warburton, Laura Ann Lindner, Juergen Lindner
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Patent number: 5744697Abstract: A gas sensor assembly having a first housing portion having a receptacle formed therein and a second housing portion in the form of a cover. A gas-sensing agent is disposed in the receptacle, and a working electrode, a counter electrode, and a reference electrode provided on a single electrode support sheet are disposed in fluid contact with the gas-sensing agent. The first housing portion is provided with three conductive housing portions which are in electrical contact with the three electrodes, and the cover maintains pressurized contact between the three conductive housing potions and the three corresponding electrodes. The gas sensor may be provided with two different types of leakage detectors to sense leakage of the gas-sensing agent from the sensor.Type: GrantFiled: August 16, 1995Date of Patent: April 28, 1998Assignees: J and N Associates, Inc., National Draeger IncorporatedInventors: Dennis Martell, Piers Richard Grove Warburton, Laura Ann Lindner, Juergen Lindner