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. 11, 2010
Filed:
Sep. 12, 2006
Richard M. Roche, Gresham, OR (US);
Richard M. Roche, Gresham, OR (US);
Other;
Abstract
Washers partially coated with a thermochromic material are incorporated into bolted electrical connections to monitor or record temperature changes undergone by the electrical connections as indications of the performance or integrity of the electrical connections. For monitoring ongoing performance, the color changes undergone by the thermochromic coated washers can be compared to each other within a common field of view or to a common datum, such as a nearby thermochromic coated washer mounted in a bolted non-electrical connection. Irreversible thermochromic materials can be used to record elevated temperature events such as approaching or reaching a design temperature limit or a fault condition. Different thermochromic materials can be combined within the same washers to monitor different ranges of temperature or to record multiple threshold events.