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Datei:MetalFatigue 003.jpg

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Beschreibung

Beschreibung Close-up of the vibration-responsive automatic stopping device recently developed at the National Bureau of Standards for use with fatigue-testing machines. A steel ball is balanced on a three-pronged pedestal, which is fastened to one of the testing machine bearing boxes at a point near the test specimen. When a crack begins to form in the specimen, vibration increases. Shaken from its pedestal by the vibration, the steel ball closes an elecrical circuit, thus actuating a relay and stopping the machine.
Quelle National Institute of Standards and Technology
Urheber National Institute of Standards and Technology
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This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Warning: this does not include Standard Reference Data, as per Standard Reference Data Act (P.L. 90-396; 15 U.S.C. 290-290f) which may be copyrighted by the NIST.

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Public domain
This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Warning: this does not include Standard Reference Data, as per Standard Reference Data Act (P.L. 90-396; 15 U.S.C. 290-290f) which may be copyrighted by the NIST.

العربية ∙ English ∙ 日本語 ∙ македонски ∙ Nederlands ∙ +/−

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