Patent Number: 6,250,863

Title: Washer having stressed and unstressed strain gauges

Abstract: A washer having a plurality of strain gauges, at least one of which is positioned on a portion of the washer subjected to axial force and at least one of which is positioned on a portion of the washer not subjected to axial force. In a preferred embodiment, each such washer portion has two strain gauges and the total of four strain gauges are connected into a common bridge circuit. In the preferred embodiment the portion of the washer not subjected to axial force is a wedge partially cut into the washer structure and shortened axially to form a gap between the wedge and a surface abutting the washer. In this manner, axial force applied to the washer is not applied to the wedge. The resulting strain gauge configuration provides an electrical signal indication of axial stress that is high resolution and temperature insensitive.

Inventors: Kamentser; Boris (Fountain Valley, CA), Kamentser; Eugenia (Fountain Valley, CA)

Assignee:

International Classification: F16B 31/00 (20060101); F16B 31/02 (20060101); G01L 1/22 (20060101); G01L 5/24 (20060101); G01L 1/20 (20060101); F16B 031/02 (); G01L 005/00 ()

Expiration Date: 06/26/2018