File:Wornum5384.svg

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Description detail, Robert Wornum's double action for the professional piano-forte
Date
Source Patent for improvements in piano-fortes - English patent no. 5,384
Author Robert Wornum (1780-1852)
Other versions reproduced in Lawrence Nalder, The Modern Piano The Gresham Press, Old Working, Surrey. 1927 p.120

c Socket, d Hammer, e Hammer ruler, f Hammer rail, g Sticker, e Damper wire and button, h Check lever, j Check, k k Hopper centre and mortoise bushed, lHopper spring fixed to sticker, m Dog spring fixed in hopper to keep the hammer from dancing after the blow, n Lifting wire for check fixed in sticker with worm and slipped into check lever : hole bushed.

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Date/TimeThumbnailDimensionsUserComment
current21:24, 8 October 2007Thumbnail for version as of 21:24, 8 October 2007465 × 1,224 (27 KB)Mireut (talk | contribs){{Information |Description=Robert Wornum's double action for the professional piano-forte |Source=Patent for improvements in piano-fortes - English patent no. 5,384 traced by User:Mireut |Date=July 4, 1826 |Author=Robert Wornum (1780-1852) |Permission
21:22, 8 October 2007Thumbnail for version as of 21:22, 8 October 2007507 × 1,277 (93 KB)Mireut (talk | contribs){{Information |Description=Robert Wornum's double action for the professional piano-forte |Source=Patent for improvements in piano-fortes - English patent no. 5,384 |Date=July 4, 1826 |Author=Robert Wornum (1780-1852) |Permission= |other_versions=reproduc

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