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:
May. 21, 1996
Filed:
Oct. 11, 1994
Robert J Haas, Coventry, CT (US);
Michael Winter, New Haven, CT (US);
Balkrishna S Annigeri, Manchester, CT (US);
Leroy H Favrow, Newington, CT (US);
Jason S Wegge, Springfield, MA (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
An apparatus for monitoring the growth of surface cracks in materials includes a servo-hydraulic test machine which applies a load to a specimen according to a predetermined loading regime designed to induce crack growth in the specimen, a UV laser for illuminating the specimen with a light having a frequency greater than the frequency of incandescent light, a UV video camera and a two dimensional imaging computer. Optionally, the two dimensional imaging computer can be used to control the servo-hydraulic test machine.