Steyr
132
Well, resonance is resonance...
Jan 08, 2021,16:44 PM
Well, resonance is resonance. It relies on physics anyway. Personaly, I'd rather call it mechanical because it is compression waves at the base level.
Now regarding (1) the distance between wheels or (2) sound transmission through mainplate/bridges, I "do not understand" either.
1°
The -short- distance between wheels have been proven irrelevant with, at least the Armin Strom that puts the wheels, at least 1-2 mm away, and with a structure in-between. Take a look at Haldimann as well as Vianney Halter and you will realize that distance is not an issue.
2°
Regarding the sound transmission, first thing we need to understand is that the loudest sound by far in the swiss lever escapement is the drop sequence. And at that time, the balance is already away, free. So the resonator cannot really be affected by the sound through the lever at the drop phase and therefore, could not transmit it toward the second resonator. So the sound would have to go another way ? From the lever at the impact of the drop, toward the other lever, through the mainplate/bridges ? But what could happen oncei reached the other lever ? Well, pretty much nothing if you ask me. Have you ever tried to manipulate a lever while the watch is wounded ? The amount of energy to interfere there would have to be from another order of magnitude compared to the sound that would have travel through the mainplate/bridges. But, for the sake of the argument, let's imagine there is a enough energy reaching that second anchor. To transmit to the second resonator, the first drop would have to occur while the anchor is connected to to the second resonator. And we know this phase is very short. Only when the balance wheel jewel is touching the pallet fork. Before is too late, after is too late.
On the other hand, if we consider ALL three proposals : Armin Strom, Haldimann, and Vianney Halter, we can see that there is a permanent connection between the stud holders. This indeed, is ideal to transmit a vibration in-between both resonators, directly. If you remember about those experiments in the science class demonstrating the resonance phenomenon (available on youtube as well) you will see that the resonators (balance type) are sharing a common link.
This, I DO understand !