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English direct lever grand action, developed by Broadwood from Backers (1884)
3. Jack operating spring.
4. Rail and cushion limiting travel of jack.
5. Button and screw regulating escapement of hammer.
6. Hammer-butt with operating notch.
7. Hammer-butt flange.
- 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