The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 1978
Filed:
Sep. 01, 1977
Gerald O Huntzinger, Anderson, IN (US);
Charles E Buck, Anderson, IN (US);
Robert E Campbell, Anderson, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A detonation sensor adapted for mounting on a vehicle engine component has a cylindrical outer case with an open end. An inner cylindrical case has an open end facing in the opposite direction as that of the outer case and is so disposed coaxially within the outer case that it is held slightly axially separated therefrom by at least one rod of a magnetostrictive material and a magnet axially in line therewith. The edges of the open end of the outer case are crimped over a washer which abuts the closed end of the inner case to exert an axial stress on the magnetostrictive rod. Axial mounting means are provided on the outer case; and a pickup coil surrounds the magnetostrictive rod within the inner case. Both inner and outer cases are formed from a magnetic material to shield the coil from external electromagnetic signals.