Optics: measuring and testing – Material strain analysis
Reexamination Certificate
2008-09-30
2008-09-30
Lauchman, L. G (Department: 2877)
Optics: measuring and testing
Material strain analysis
C434S300000, C434S302000, C446S219000
Reexamination Certificate
active
11328987
ABSTRACT:
Photoelastic elements are formed deliberately with stress concentrations so that, when evaluated with a polariscope, more pronounced isochromatic bands or fringes result when loads are applied to these elements or to assemblies of these elements. A toy for producing color patterns and having polarizing filters coupled to frame elements is disclosed.
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Anderson John C.
Szaroletta William K.
Barnes & Thornburg LLP
Lauchman L. G
Purdue Research Foundation
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