ei8htohms
8555
I know of no universally agreed upon testing methods
Oct 19, 2008,08:47 AM
Hi Kong,
There may be quantitative tests used by engineering schools or other disinterested organizations to measure the efficiency of an automatic winding mechanism, but I am not aware of them or what they would involve. One can only assume that different manufacturers do have testing criteria they use to determine the relative efficiency of competing designs during the R&D and prototyping phases of movement development, but how "good" they might be and how much variety may exist from one manufacturer to the next is unknown to me as well.
_john
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Yes. SJX's observations are correct. THIS is a movement of great importance.
By: bernard cheong : October 18th, 2008-18:00
The placement of the power gathering pinion off to the edge, away from the centre is of incredible significance. This will be the very first movement to do it. Complex and beautiful stuff can be placed over the movement to bring us all sorts of wonderful ...
not the first, but possibly the last...
By: ei8htohms : October 19th, 2008-01:05
Hello Bernard, I'm gonna have to disagree strongly with your observations about the significance and particularly "innovation" of using a peripherally mounted rotor. Citizen attempted this in the '60s with little success and so did Patek Philippe (Cal. 35...
I know of no universally agreed upon testing methods
By: ei8htohms : October 19th, 2008-08:47
Hi Kong, There may be quantitative tests used by engineering schools or other disinterested organizations to measure the efficiency of an automatic winding mechanism, but I am not aware of them or what they would involve. One can only assume that differen...
further technical observations
By: jfsuperior : October 19th, 2008-07:39
John, As a watchmaker I appreciate your technical input and I raise similar concerns though I would like to see the Bucherer movement in my hands to reach any definitive conclusions. But, I've attached a photo I stitched together of three different automa...
thanks Jack, interesting info about the Perrelet design
By: ei8htohms : October 19th, 2008-09:05
Hi Jack, I also would like to see the Bucherer movement in person, but it would take some kind of quantitative testing or substantial anecdotal reporting from wearers and watchmakers working on the movement to convince me of how ell it actually works. I'v...