File:RabinowJacob 008.jpg
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Summary
[edit]DescriptionRabinowJacob 008.jpg |
Jacob Rabinow invented the Magnetic Particle Clutch in 1947 during his work on ordnance at the National Bureau of Standards. The particle clutch used a mixture of light lubricating oil and powdered carbonyl iron inside a chamber connecting two free spinning plates. When an electromagnet attached to the chamber was energized, the iron particles would magnetize and attract each other, producing an almost solid mass, which locked the plates together. Controlling the magnetic flux would control the amount of torque between the plates. Because Rabinow invented the Magnetic Particle Clutch as part of his work at the National Bureau of Standards, the United States Government owned the U.S. patent. However, in partnership with his brother Joseph, Rabinow did file for patents in 22 foreign countries. Due of the simple design, precise torque control, smooth operation, and long life, the device found wide application. It was used in Renault and Subaru automobiles in Europe and Japan, in airplane controls, and in the disc file of the IBM RAMAC computer. Reference: Inventing for Fun and Profit. Jacob Rabinow. San Francisco Press, San Francisco, CA. (1990). pp. 49-55. |
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Source | National Institute of Standards and Technology | ||||
Author | National Institute of Standards and Technology | ||||
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[edit]Public domainPublic domainfalsefalse |
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.
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current | 17:09, 10 March 2014 | 5,738 × 4,554 (24.67 MB) | NISTResearchLibrary (talk | contribs) |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Image title |
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Author | National Institute of Standards and Technology |
Copyright holder |
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Headline | National Institute of Standards and Technology |
Source | Jacob Rabinow Photographic Collection |
Short title |
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Date and time of data generation | 20 March 1972 |
Width | 5,738 px |
Height | 4,554 px |
Bits per component |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 600 dpi |
Vertical resolution | 600 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS6 (Windows) |
File change date and time | 15:19, 9 September 2013 |
Exif version | 2.21 |
Color space | Uncalibrated |
Unique ID of original document | BD90309FFF5B3E1D3DECA770C599B695 |
Original transmission location code | 72-212 |
Date metadata was last modified | 11:19, 9 September 2013 |
Date and time of digitizing | 11:46, 13 August 2013 |
Keywords |
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Contact information | library@nist.gov
100 Bureau Dr, MS 2500 Gaithersburg, MD, 20899 |
IIM version | 4 |