File:1842wornumfig4.svg

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Summary

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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15 August 1842Gregorian

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Date/TimeThumbnailDimensionsUserComment
current06:04, 4 June 2009Thumbnail for version as of 06:04, 4 June 2009531 × 156 (72 KB)Mireut(...inkscape 4.6)
05:06, 4 June 2009Thumbnail for version as of 05:06, 4 June 2009531 × 156 (80 KB)Mireut(plain svg)
04:40, 4 June 2009Thumbnail for version as of 04:40, 4 June 2009531 × 156 (86 KB)Mireut{{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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