Upright Underdamper Action Diagram

Nomenclature

1. Hammer Head
2. Hammer Felt
3. Hammer Shank
4. Butt
5. Balance Hammer Shank
6. Balance Hammer
7. Balance Hammer Leather
8. Tape
9. Tape end
10. Butt spring
11. Butt cushion
12. Butt notch
13. Butt pad
14. Butt flange
15. Hammer rail beam
16. Set off rail bracket
17. Set off rail
18. Set off screw
19. Set off button
20. Check
21. Check felt
22. Check wire
23. Tie wire
24. Lever (whippen)
25. Jack
26. Lever Flange
27. Spiral Spring (Jack Spring)
28. Damper spoon
29. Damper lift rail
30. Damper body
31. Damper tail
32. Damper flange
33. Damper spring
34. Damper wire
35. Damper drum
36. Damper drum screw
37. Damper head
38. Damper felt
39. Hammer rest rail
40. Half blow rest rail
41. Hammer rest baize
42. Half blow flange
43. Jack check rail
44. Jack check rail (right and left) screw
45. Damper check rail