File:Accurate measurement of short-time intervals (IA accuratemeasurem19173unse).pdf
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Summary
[edit]Accurate measurement of short-time intervals
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| Title |
Accurate measurement of short-time intervals |
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| Volume | Scientific Papers of the Bureau of Standards, Vol. 19, p. 17-38 (1922) Scientific Paper 470 (S470) | |
| Publisher |
National Bureau of Standards |
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| Description |
The method consists in producing simultaneously on a moving photographic film a record of the occurrence of the events under consideration and timing lines from a tuning fork acting as a shutter. This shutter consists of two opaque vanes, in which narrow slits have been cut, mounted on the prongs of a tuning fork, so that the slits are parallel to the axis of the fork, and coincide when the fork is at rest. When the fork vibrates the two slits will coincide twice during each complete period of the fork. The shutter is brilliantly illuminated, and the light which passes through as a flash when the shutter is opened is focused on the film by means of a suitable optical system. The accuracy depends on the accuracy of the tuning forks, of which there are three cl Subjects: |
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| Language | English | |
| Publication date | 1922 | |
| Current location |
IA Collections: NBSScientificPapers; NISTresearchlibrary; fedlink; americana |
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| Accession number |
accuratemeasurem19173unse |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 22:50, 27 August 2020 |  | 975 × 1,414, 36 pages (1.33 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection accuratemeasurem19173unse (User talk:Fæ/IA books#Fork8) (batch 1000-3000 #117052) |
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