"Apes don't read Nietzsche."
"Yes, they do, Otto. They just don't understand it."
You are correct, pat. 2,741,146 shows the screw as being the fulcrum. This is an illustration of coarse, an artists rendering, and the practical application of the device does not use the screws as the fulcrum. Yes, you have correctly disseminated how the patent drawing artist may have interpreted the sum of the parts to function, but you still don't understand how it actually works.
Yes, the bevel permits the plate to move closer to the body and prevent it from digging into the wood, a function allowed by the very presence of the bevel. Otherwise, you would have a steel sheet setting flush against a block of wood and very little see-saw effect.
A Patent is a form of intellectual property, it's not a plan or schematic. It is only meant to exclude others from using an invention without permission. The patent shows a detailed rendering of the parts used in this invention but you couldn't patent the function. The patent was for the components of the system. Obviously, there were many tremolo designs in the 50's. To see how the actual plan was practiced, look at an actual synchronized tremolo.
"By the laws of physics, as the action of the springs counteracts the pull of the strings, the force evens itslf out (Newton's Law). Therefore, 6 little doughnuts will have an increasingly large effect, the closer the plate comes to equilibrium."
Sure, the first part is correct. But being that the little doughnuts would have been accounted for in the original equilibrium of the system at rest, when the system returned to its resting state the same equilibrium would happen. Though, the little doughnuts would not have an increasingly large effect as the system returned to equilibrium as they too would be returning to their un-sprung state. The force is onto the rubber doughnuts from the plate when they are compressed, not the other way around. Equal and opposite, the force released by the doughnuts will not be more than exerted upon them when un-sprung.
You are confusing information with knowledge.
We didn't have a difference of opinion, I didn't give an opinion. I gave several suggestions based on things I have learned and experienced. You felt the need to dispute one thing I mentioned while admitting to not having any experience with the subject and latter illustrating a basic lack of understanding of the entire system. That cheesed me off. I enjoy sharing my experience on this forum and I obviously don't mind having my credibility challenged, but I do mind blind conjecture and misinformation when it's aimed at me. I have and will gladly redact what I claim when proven otherwise and always try to investigate and remediate any mistake I might make, I think it is important to do so in respect to this community. I also feel that disputing any claims made by contributors should stand to a more rigorous scrutiny of facts and to just do so admittedly on a hunch is disrespectful to the entire community and bad form. I do apologize for mis-paraphrasing your comment I did so to illustrate my frustration. I promise, any further malignment with you will be greeted as pointedly as possible.
Here is some further reading: http://en.wikipedia.org/wiki/Vibrato_systems_for_guitar
The basis of the synchronized tremolo is a rigid assembly that incorporates both the bridge and tailpiece, which pivots on the guitar belly. In the original design, this was based on the principle of the "knife edge" balance. A bevel on the front underside of a steel top plate formed a wide, sharp edge that rested on the top of the guitar body. A small imbalance in tension between the pull of the strings and the counterbalancing pull of the springs held the pivot edge firmly in place against the body.
Six hardened steel wood screws passing through slightly oversize holes just in front of the pivot point stopped the bridge from being pulled towards the neck end of the guitar. The upper portion of the screws is smooth, not threaded. These six screws are often mistakenly assumed to be the pivot point rather than the hidden knife edge. This design works, in spite of the friction caused by the edges of the six holes sliding up and down the screw shafts when vibrato is applied.