Structure of gas sensor ensuring stability of electrical joint

An improved structure of a gas sensor is provided which is designed to ensure the reliability of electrical joints between a ceramic heater disposed in a sensor element and connector terminals for supplying electric power to the heater. The connector terminals are joined to lead wires extending outs...

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Bibliographic Details
Main Authors KOJIMA TAKASHI, TAKAMURA KOZO
Format Patent
LanguageEnglish
Published 24.02.2005
Edition7
Subjects
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:An improved structure of a gas sensor is provided which is designed to ensure the reliability of electrical joints between a ceramic heater disposed in a sensor element and connector terminals for supplying electric power to the heater. The connector terminals are joined to lead wires extending outside the gas sensor to a power source. The connector terminals are elastically deformable and fitted on power supply electrodes affixed to the heater to establish electric contacts therebewteen without use of a brazing material. This permits the connector terminals and the power supply electrodes to thermally expand independently of each other when subjected to intense heat, thus resulting in almost no thermal stress on the electric contacts, which ensures the reliability of such contacts in high temperature environments.
Bibliography:Application Number: US20040923006