Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Specified electrical sensor or system
Patent
1978-03-24
1979-03-27
Ciarlante, Anthony V.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Specified electrical sensor or system
73810, G01N 332
Patent
active
041459334
ABSTRACT:
An indicator for recording the load at which a fatigue specimen breaks during the last cycle of a fatigue test. A load cell is attached to the specimen which is alternately subjected to tension and compression loads. The output of the load cell which is proportional to the load on the specimen is applied to the input of a peak detector. Each time that the specimen is subjected to a compression load, means are provided for appyling a positive voltage to the reset of the peak detector to reset it. Hence, during the last cycle of the tension load the peak detector measures the maximum load on the specimen. Means are also provided for disconnecting the load cell from the peak detector when there is a failure in the specimen.
REFERENCES:
patent: 3304768 (1967-02-01), Naumann et al.
patent: 3744300 (1973-07-01), Fleury
Davis David C.
Davis William T.
Imig Leland A.
Ciarlante Anthony V.
King William H.
Manning John R.
Osborn Howard J.
The United States of America as represented by the Administrator
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