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:
Aug. 03, 1982
Filed:
Nov. 04, 1980
Howard T Savage, Greenbelt, MD (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An angular accelerometer that has a high coupling factor, temperature stability and can function at low frequencies. The accelerometer is provided with a cylinder of Terfenol (Tb.sub.0.27 Dy.sub.0.73 F.sub.2) positioned in a conducting non-ferromagnetic hollow cylinder having a ferromagnetic base and a ferromagnetic lid. The cylinder of Terfenol is compressed between the ferromagnetic lid and base with the compression adjusted for maximum magnetomechanical coupling and strength. Permanent magnets are also positioned in the hollow cylinder to provide magnetic bias to the Terfenol cylinder. When the accelerometer undergoes an angular acceleration about its cylindrical axis a voltage will appear between the center and the ends of the Terfenol cylinder. By measuring the voltage, the angular (rotational) acceleration of the accelerometer about its cylindrical axis may be determined.