..the Music Stand Hinge..

I don't know this term. Explain yourself better. Anyway, regardless of the terminology, one must focus on the function of each piece. The terminology must be exact, but the important thing is to understand each other.

....let me explain myself better on page 28 of the book "Elements of piano technology and physics" edited by Lucio Canavese, in the chapter THE MECHANICS.. one reads about a current conventional type of mechanics that provides acceptable dynamic properties and repetition speed; it presents as a main element a jack with a hinge mounted horizontally attached to a double repetition spring.

and it shows a photo of the jack ...as we understand it... so I said to myself... the jack has a lower lever, the one where there is the fork to bind it to the frame, and an upper lever, also called the repetition tangent, if I rely on my school background... from 40 years ago.. I remember that hinge and pivot were one: the fixed pin, and hinge was the moving part of a door, for example, so I said to myself, it can't possibly be the center pin!!!????

Unfortunately, the trouble with some "authors" is that instead of making a fundamental concept clear, they tangle it up even more.. what do you think about this??

GREETINGS

saverio

Forgive me, but I would not want to mistakenly attempt to decipher terminology that I do not know; as I repeat, it is not the time to debate doubtful things, perhaps without photographic or graphic support, risking creating even more confusion. The book I showed, in five languages, makes clear, forever, the terminology accepted at a European level.

Anyway, it can be hypothesized.

In some mechanisms dating back to the beginning of the last century, called "linked mechanisms," the lever was connected to the key via a joint bearing two pins....it resembled an actual hinge. Subsequently, this system, which was also mounted on some Bechstein, disappeared. It has been replaced by the pilot that pushes on the heel of the lever. It is only a hypothesis.

Paolo, you are right, here is the link..

http://www.canavesepianoforti.it/elementiditecnica.pdf

and tell me what a puzzle it is... you know that I am your ASSIDUOUS student.

Greetings

saverio

Hi Saverio, regarding how much you publish of the internal information notes, could you please include the sources? Thank you 😉

Here is friend Simone satisfied....the source to cite is Lucio Canavese from GOOGLE...page 28/45...I hope I have been exhaustive....

Greetings

saverio