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pivot screws

Author: jim lande
Date: 2013-06-21 05:43

I'm working on a Wm Frank Co metal clarinet. (The William Frank Company operated in Chicago from 1910 at least through 1950.) The pivot screws thread into the long keys and rotate when the key is pressed. I have never seen this before. I have seen some pivot screws that end in rods instead of points, but the threading screws into the post.

Has anyone seen this on another make of clarinet?

Seems like there would be more friction with this arrangement and if the key is loose between the posts, the pivot screw won't keep it centered. However, I have seen pointed pivot screws that pinch keys if they are screwed in all the way. Won't be a problem on this clarinet. Any other thoughts?

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pivot screws

jim lande

2013-06-21 05:43