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File:Differential adjuster from patent 585184 fig 1, 2.png

Differential_adjuster_from_patent_585184_fig_1,_2.png (614 × 599 pixels, file size: 114 KB, MIME type: image/png)

Summary

Description
English: Exterior and cutaway drawing of micrometer adjustment mechanism from US patent 585184[1].

Legend
  1 - Main barrel
  4 - Adjusting rod (a tab on the rod, not shown, fits into a slot on the barrel to prevent them from rotating relative to each other; they are confined to sliding in and out)
10 - Female screw cut into tube 1 (orange); the example uses a right hand, 20 threads per inch (tpi) pitch
11 - Male screw cut onto rod 4 (blue); the example uses a right hand, 25 tpi thread
12 - Sleeve cap or thimble
12x -Milled bead on thimble
13 - Nut sleeve with, for example, outer 20 tpi threads (orange) and inner 25 tpi threads (blue); fixed attachment to sleeve cap 12
14 - Beveled end of sleeve cap with ruler markings to show rotational movement

Each full rotation of the thimble + nut sleeve, 12 + 13, moves the rod 0.01 in (0.25 mm) relative to the main barrel due to the differential motion from the 20 tpi and 25 tpi threads.

  1. ↑ US patent 585184 (1897-06-29) Clarke, George R. Calipers
Date
Source US Patent 585184 (1897), "Calipers"
Author George R. Clarke

Licensing

Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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inception

29 June 1896Gregorian

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Date/TimeThumbnailDimensionsUserComment
current19:59, 10 June 2015Thumbnail for version as of 19:59, 10 June 2015614 × 599 (114 KB)Mwarren usConfine color to threaded areas.
19:57, 10 June 2015Thumbnail for version as of 19:57, 10 June 2015675 × 659 (42 KB)Mwarren usReverted to version as of 22:00, 14 December 2012
19:53, 10 June 2015Thumbnail for version as of 19:53, 10 June 2015614 × 599 (114 KB)Mwarren usAdd color to differentiate the two thread pitches.
22:00, 14 December 2012Thumbnail for version as of 22:00, 14 December 2012675 × 659 (42 KB)Mwarren usUser created page with UploadWizard

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