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Johansson invented the gauge block set, also known as "Jo Blocks" ("Johansson gauge blocks"). [1] [2] He was granted his first Swedish patent on 2 May 1901, Swedish patent No. 17017 called "Gauge Block Sets for Precision Measurement". He formed the Swedish company CE Johansson AB (CEJ AB), Eskilstuna, Sweden in 1911.
Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths. The individual gauge block is a metal or ceramic block that has been precision ground and lapped to a specific thickness. Gauge blocks come in sets of blocks with a range of standard lengths.
Paragraph 3 of the history section gives the incorporation date of AB C.E. Johansson as March 16, 1917. I've seen this date in the Ford history and maybe elsewhere but Althin; CEJ The Master of Measurement gives this date as March 16, 1911. Ref: Althin p. 126 and in the chronology on p. 163 (only 1911 without month and day here).
Gauge block, (also known as a gage block, Johansson gauge, slip gauge, or Jo block) a precision ground and lapped length measuring standard. It is used as a reference for the setting of measuring equipment used in machine shops, such as micrometers, sine bars, calipers, and dial indicators (when used in an inspection role).
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In the early 1970s, the Brazilian factory was moved to a new location in the city of Itu, 100 km from São Paulo. In 1958, a plant was opened in Scotland, which currently makes products for the European and Asian markets. In 1962, Starrett acquired the Webber Gage Company, adding gauge blocks to the Starrett product line. [7]
An especially prominent method is the digitization and georeferencing of historical maps. Old maps may contain valuable information about the past. By adding coordinates to such maps, they may be added as a feature layer to modern GIS data. This facilitates comparison of different map layers showing the geography at different times.
Tracks across Continents, Paths through History: The Economic Dynamics of Standardization in Railway Gauge. University of Chicago Press. ISBN 978-0-226-68509-0. Setti, João Bosco (2008). Brazilian Railroads. Rio de Janeiro: Memória do Trem. ISBN 978-85-8609409-5 – via Google Books. Vaughan, A. (1997). Railwaymen, Politics and Money. London ...