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Double repetition action of Sebastian Erard as used by S. & P. Erard, Paris
4. Escapement lever.
8. Jack regulating button.
9. Regulating button to limit rise of escapement lever.
12. Felt cushion to engage with check.
13. Sticker connecting key and wippen.
16. Damper operating device.
17. Device to limit travel of jack.
19. Spring (v-shaped) for escapement lever and jack.
- Theory and Practice of Piano Construction
With a Detailed, Practical Method for Tuning
By William B White
Published in 1906
Available from gutenberg.org
- Posted on
- Tuesday 23 February 2021
- musical instrument