File:Piano upright action.png

1, Key 2. Key frame 3. Key lead 4. Front rail pin and punching 5. Balance rail pin and punching 6. Back rail cloth 7. Capstan screw 8. Abstract 9. Abstract lever 10. Abstract lever flange 11. Lower action rail 12. Action bracket 13. Wippen 14. Jack flange 15. Jack spring 16. Jack knuckle 17. Jack 18. Bridle wire 19. Back check 20. Bridle tape 21. Regulating rail 22. Regulating button and screw 23. Jack stop rail 24. Back stop 25. Hammer butt 26. Hammer shank 27. Hammer molding 28. Hammer top felt 29. Hammer under felt 30. Wippen flange 31. Spoon 32. Middle action rail 33. Damper lifting rod 34. Damper lever 35. Combination flange for damper lever and hammerbutt 36. Spring rail spring 37. Spring rail 38. Damper wire 39. Damper block 40. Damper head 41. Damper felt 42. Action bolt

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