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Cristofori’s action in its final form

Cristofori’s action in its final form.png Iron plate for upright pianoforte with Agraffes (Mehlin patents)MiniaturesThe Erard grand action modified by HerzIron plate for upright pianoforte with Agraffes (Mehlin patents)MiniaturesThe Erard grand action modified by HerzIron plate for upright pianoforte with Agraffes (Mehlin patents)MiniaturesThe Erard grand action modified by HerzIron plate for upright pianoforte with Agraffes (Mehlin patents)MiniaturesThe Erard grand action modified by HerzIron plate for upright pianoforte with Agraffes (Mehlin patents)MiniaturesThe Erard grand action modified by Herz
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 1. Key.
 2. Jack.
 3. Jack-operating spring.
 4. Cushion limiting rebound of jack.
 5. Under-hammer.
 6. Hammer-butt.
 7. Hinge of hammer-butt.
 8. Hammer-shank.
 9. Hammer head.

10. Check.
11. Damper-lifter.
12. Damper-head.
13. Action-beam.
14. Wrest-plank.
15. Tuning pins.
16. Bearing-bridge.
17. String.

Auteur
Theory and Practice of Piano Construction
With a Detailed, Practical Method for Tuning
By William B White
Published in 1906
Available from gutenberg.org
Dimensions
951*528
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