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Standard modern American grand action

Standard modern American grand action.png Grand pianoforte action with metallic action and damper framesThumbnailsStandard American upright actionGrand pianoforte action with metallic action and damper framesThumbnailsStandard American upright actionGrand pianoforte action with metallic action and damper framesThumbnailsStandard American upright action

1. Key.
 2. Wippen.
 3. Jack.
 4. Escapement lever.
 5. Hammer-shank.
 6. Roller.
 7. Hammer-head.
 8. Jack-regulating button.
 9. Regulating button to limit rise of escapement lever.
10. Hammer-butt.
11. Check.

12. Molded tail of hammer-head to engage with check.
13. Key-rocker and sticker connecting wippen and key.
14. Action-rails.
15. Damper-head.
16. Damper operating device.
17. Device to limit travel of jack.
18. Regulating device for escapement lever.
19. Separate springs for jack and escapement lever.
20. String.
21. Flanges.

Author
Theory and Practice of Piano Construction
With a Detailed, Practical Method for Tuning
By William B White
Published in 1906
Available from gutenberg.org
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