Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1989-04-11
1990-10-30
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
73 35, H01L 4108
Patent
active
049671146
ABSTRACT:
An acceleration detector of the present invention which may be secured by a single screw to an internal combustion engine comprises a housing and a piezoelectric acceleration transducer assembly mounted in the housing by a stop nut. The detector comprises a recess for being engaged by a projection of the engine for positioning and preventing an undesirable rotation of the housing upon turning of the stop nut. The acceleration detector may comprise a low-friction washer between the nut and the terminal of the transducer assembly for preventing an undesirable rotation of the terminal upon turning of the nut. Alternatively, one of the terminals of the acceleration transducer assembly is made sufficiently rigid to permit the use of a tool on it to firmly hold it. An electrically insulating stopper projection may be provided between the terminals to prevent an undesirable rotation of the terminals. In order to facilitate the precise assembly of the acceleration transducer assembly, projection tabs are provided on the terminal for engagement with the piezoelectric element. Also, the contact surface of the stop nut may contact substantially the entire surface of the weight.
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Komurasaki Satoshi
Ueda Atsushi
Budd Mark O.
Mitsubishi Denki & Kabushiki Kaisha
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