File:1842wornumfig4.svg

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Description
English: Diagrams of the second and first improvements from the specification of the English patent granted to Robert Wornum, dated February 15, 1842; traced and colorized by User:Mireut
Date
Source Fig. 4, sheet 3, from Robert Wornum "Improvements in the action of pianofortes" English patent no. 9,262 February 15, 1842
Author Robert Wornum

a, key; b, hammer; d, hammer return spring; k, spring lever; l, strap of leather; m, hammer rail; n, rocking lever; p, projection; q, hopper; s, damper wire; v, damper lever; w, damper lever axis

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 Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).
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Date/TimeThumbnailDimensionsUserComment
current06:04, 4 June 2009Thumbnail for version as of 06:04, 4 June 2009531 × 156 (72 KB)Mireut (talk | contribs)(...inkscape 4.6)
05:06, 4 June 2009Thumbnail for version as of 05:06, 4 June 2009531 × 156 (80 KB)Mireut (talk | contribs)(plain svg)
04:40, 4 June 2009Thumbnail for version as of 04:40, 4 June 2009531 × 156 (86 KB)Mireut (talk | contribs){{Information |Description={{en|1=Diagrams of the second and first improvements from the specification of the English patent granted to Robert Wornum, dated February 15, 1842; traced and colorized by User:Mireut}} |Source=Fig. 4, sheet 3, from Robert

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