File:TriDominoes Richards 113.svg

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Original file ‎(SVG file, nominally 200 × 175 pixels, file size: 2 KB)

Captions

Captions

Triangular dominoes, as described by Frank Richards in US Patent 331,652 (1885)

Summary

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Description
English: Triangular dominoes, as described by Frank Richards in US Patent 331,652 (1885). The dominoes are marked with pips on each side and the sum of the pips in the center. The filename embeds the pip configuration "TriDominoes Richards XYZ", where:
  • X = number of pips on lower edge
  • Y = number of pips on upper right edge
  • Z = number of pips on upper left edge
In the patent, Richards describes two sets of 24 (pip values ranging from 0 to 4) or 56 (pips 0 - 5), described in a way so the numbers are always increasing when written starting with the lowest value (i.e., 123 is possible but not 132). The figures accompanying the patent show the pip values increase (or are equal) when counted in a clockwise fashion, starting from the lowest value(s). These drawings show the pip values increasing (or equal) when counted in an anti-clockwise direction.
Date
Source Own work
Author Mliu92

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I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
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  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

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Date/TimeThumbnailDimensionsUserComment
current17:02, 3 January 2024Thumbnail for version as of 17:02, 3 January 2024200 × 175 (2 KB)Mliu92 (talk | contribs)Uploaded own work with UploadWizard

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