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Standard modern American grand action

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Standard modern American grand action.png Grand pianoforte action with metallic action and damper framesThumbnailsDouble repetition action of Sebastian Erard as used by S. & P. Erard, ParisGrand pianoforte action with metallic action and damper framesThumbnailsDouble repetition action of Sebastian Erard as used by S. & P. Erard, ParisGrand pianoforte action with metallic action and damper framesThumbnailsDouble repetition action of Sebastian Erard as used by S. & P. Erard, ParisGrand pianoforte action with metallic action and damper framesThumbnailsDouble repetition action of Sebastian Erard as used by S. & P. Erard, ParisGrand pianoforte action with metallic action and damper framesThumbnailsDouble repetition action of Sebastian Erard as used by S. & P. Erard, Paris

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.