File:RabinowJacob 042.jpg
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Summary
[edit]DescriptionRabinowJacob 042.jpg |
Overall view of the laboratory prototype machine developed for the Post Office for the automatic high-speed sorting of letter mail. It can sort at the rate of 36,ooo letters per hour into as many categories as may be needed. It consists essentially of a large number of pockets on an endless conveyor and electromechanical equipment that controls the dropping of a letter from a pocket into a specific fixed receptacle. As can be seen in the photographs, fourteen pockets are grouped together into a single unit for convenience of handling on the conveyor. In 1957 Jacob Rabinow’s company, Rabinow Engineering, designed a mechanical coding and sorting system for the U.S. Post Office. Based on similar work Rabinow had done previously for the Census Bureau, the system for the Post Office consisted of a conveyor belt cart designed to carry 12 envelopes in separate compartments. Each compartment in the cart was accompanied by an escort memory. The escort memory consisted of a shaft carrying a series of nylon code wheels. Each of the 134 wheels could move laterally into one of two positions. With this combination, more than 8000 (in decimal notation) binary numbers could be set. Twelve keyboard operators would read envelope addresses and set the positions of the code wheels. The wheels were supported on a track also composed of binary elements. When the encoded compartment hit the same encoded position on the track, the shaft dropped, triggering a door release in the compartment holding the envelope. The envelope then fell into the appropriate pocket. About 600 of the letter sorting machines were built and used by the Post Office. In later operations optical character recognition technology replaced the keyboard operators, and the mechanical escort memory was replaced by computer memory. Reference: Inventing for Fun and Profit. Jacob Rabinow. San Francisco Press, San Francisco, CA. (1990). pp. 100-138. |
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Date | 4/1/1958 | ||||
Source | National Institute of Standards and Technology | ||||
Author | National Institute of Standards and Technology | ||||
Permission (Reusing this file) |
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Licensing
[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 | 17:15, 10 March 2014 | 5,723 × 4,599 (23.61 MB) | NISTResearchLibrary (talk | contribs) |
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Metadata
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.
Author | National Institute of Standards and Technology |
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Copyright holder |
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Headline | National Institute of Standards and Technology |
Source | Jacob Rabinow Photographic Collection |
Short title |
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Image title |
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Date and time of data generation | 1 April 1958 |
Width | 5,723 px |
Height | 4,599 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 | 15:22, 9 September 2013 |
Exif version | 2.21 |
Color space | Uncalibrated |
Unique ID of original document | 01D43BCBC5AEC121286146FBEADE01BD |
Original transmission location code | 27199-5 |
Date metadata was last modified | 11:22, 9 September 2013 |
Date and time of digitizing | 11:47, 13 August 2013 |
Keywords |
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Contact information | library@nist.gov
100 Bureau Dr, MS 2500 Gaithersburg, MD, 20899 |
IIM version | 4 |