File:Cermets 5 Cermet Substrate Screening 2012 002 5979.tiff

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Beckman Model 61 Potentiometer (Cermet Screening)   (Wikidata search (Cirrus search) Wikidata query (SPARQL)  Create new Wikidata item based on this file)
Photographer
Herb Radin and Associates
Title
Beckman Model 61 Potentiometer (Cermet Screening)
Description

5. Steatite substrates are placed into precision machines which automatically silk screen the precious metal conductive materials for the slider and end terminations. Substrates are then fired to temperatures in the range of 1,500 to 2,000 °F in tunnel kilns. The cermet resistance materials, composed of glass and precious metals suspended in a liquid carrier, are then screened onto the substrate, dried, and returned to the kilns for final firing. The inherent characteristics of cermet afford resistance ranges from 10 ohms to 2 megohms, whereas carbon elements are limited to the high ranges, wirewound to the low and metal film to the middle ranges.

Published without a copyright notice in "The making of a cermet trimmer, 1966" in Beckman Instruments' newsletter Helinews, number 36, Spring 1966, pp. 4-5. Part of a two-page spread detailing the process of manufacturing cermet trimmers.
Date 1966
date QS:P571,+1966-00-00T00:00:00Z/9
institution QS:P195,Q5090408
Accession number
Beckman Historical Collection
Credit line Science History Institute.
Notes Image downloaded with permission from the Science History Institute, as part of the Wikipedian in Residence initiative.
Source https://digital.sciencehistory.org/works/9019s324t
Permission
(Reusing this file)
This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.

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current19:37, 17 April 2020Thumbnail for version as of 19:37, 17 April 20201,068 × 646 (2.63 MB)Mary Mark Ockerbloom (talk | contribs)== {{int:filedesc}} == {{Photograph |photographer = Herb Radin and Associates |title = Beckman Model 61 Potentiometer (Cermet Screening) |description = 5. Steatite substrates are placed into precision machines which automatically silk screen the precious metal conductive materials for the slider and end terminations. Substrates are then fired to temperatures in the range of 1,500 to 2,000 °F in tunnel kilns. The cermet resistance materials, composed of gla...

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