Signals and indicators – Indicators – Temperature responsive or compensating means
Patent
1999-02-26
2000-12-12
Gutierrez, Diego
Signals and indicators
Indicators
Temperature responsive or compensating means
116201, 116207, 116209, 374102, 374187, 374199, G01K 102, G01K 104, G01D 502, G01D 1100
Patent
active
061583812
ABSTRACT:
A time-temperature indicator indicates the useful shelf life of an associated product which may be affected by the passage of time and an applied temperature. A creeping material has a first end connected to a first fixed location and a second end connected to a load applying device such as a spring. In response to application of the load applying device, the passage of time, and the application of various temperatures, the creeping material will increase in length in a known manner. An indicator associated with the creeping material indicates whether the passage of time and application of various temperatures have caused the associated product to exceed its useful shelf life.
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EPRI NP-1558, "A Review of Equipment Aging Theory and Technology," Final Report Project 890-1, Electric Power Research Institute, 1980.
Arthur D. Little Inc., "Shelf Life Specifications for Mission Readiness; NCEL Contract Report," CR 93.001, Mar. 1993 and CR96.007, Jun, 1996.
Howard E. Boyer, Atlas of Creep and Stress-Rupture Curves, ASM International, 1998.
Francis Faye
Gutierrez Diego
Ideas to Market, L.P.
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