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Cristofori’s action in its final form

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Cristofori’s action in its final form.png English direct lever grand action, developed by Broadwood from Backers (1884)ThumbnailsIron plate for upright pianoforte with Agraffes (Mehlin patents)English direct lever grand action, developed by Broadwood from Backers (1884)ThumbnailsIron plate for upright pianoforte with Agraffes (Mehlin patents)English direct lever grand action, developed by Broadwood from Backers (1884)ThumbnailsIron plate for upright pianoforte with Agraffes (Mehlin patents)English direct lever grand action, developed by Broadwood from Backers (1884)ThumbnailsIron plate for upright pianoforte with Agraffes (Mehlin patents)English direct lever grand action, developed by Broadwood from Backers (1884)ThumbnailsIron plate for upright pianoforte with Agraffes (Mehlin patents)

 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.