Acceleration detector
US4967114A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1989 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Apr 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/0907
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.