Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Threaded fastener stress
Patent
1997-11-07
1999-01-19
Biegel, Ronald
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Threaded fastener stress
411 11, 411186, 411544, G01L 506
Patent
active
058615571
ABSTRACT:
An annularly configured device for use on each earthquake restrainer cable of a bridge, which device, will deform due to its internal configuration upon the occurrence of an earthquake, if the earthquake stresses the bridge cable with which the device is associated excessively. The result of the stress is a visual indication of the cable's elongation as manifested by a "crowning" of the annular indicator and a shortening of its length. The specific configuration required of the annular member is one of a reduced thickness section of the interior wall, with tapered edges leading to the main cross section of the annular member.
REFERENCES:
patent: 2476561 (1949-07-01), Pedersen
patent: 3469492 (1969-09-01), Dahl
patent: 3812758 (1974-05-01), Bossler, Jr.
patent: 3948141 (1976-04-01), Shinjo
patent: 4170163 (1979-10-01), Payne
patent: 4498825 (1985-02-01), Pamer et al.
patent: 4506555 (1985-03-01), McCubbin
Biegel Ronald
Jacobs, Esq. Mark C.
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