Valerie D Dombrowski

US Patent:

57674132, Jun 16, 1998

Filed:

May 30, 1996

Appl. No.:

8/657726

Inventors:

Valerie D. Dombrowski - Elkton MD
Lon M. Stevens - Huntsville AL
Boyd D. Bryner - Brigham City UT

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G01N 308
H01C 1002

US Classification:

73774

Abstract:

A gauge for measuring a dimensional change, such as a change in the periphery of a test object, is an elastomeric tube filled with an electrically conductive fluid such as mercury. The gauge can be formed into a loop around the test object. Thereafter, any change in, e. g. the circumference of the test object is monitored by measuring the change in resistance (or voltage) between the ends of the tube.