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Hi all,

if we can agree that breakage is the death of a spring, all springs are lifetime springs. And an unbreakable spring doesn't exist, neither in a watch, nor anywhere else in the known universe.

Regards, Roland Ranfft
 

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Hi there,

Isn't there some kind of clutch?
When overwound, clutch slides
??
Yes, but only in selfwinding watches, where you have no control over the winding process. And there it is not realised to protect the spring. Long before any harm is done to the spring, the teeth of the winding gears ere completely shaved.

And refering manual winding: In the load chain between your fingertips and the mainspring, the spring is the most robust link. Else you will first crack any part of the gear or get bloody fingertips, long before "overwinding" the spring.

Consider why springs break anywhere between both terminals, and almost never at their weakest sections, the terminal holes or the welded on terminal hook. So they break due to repeated changes of tension, not by too high tension. Yes sometimes the welding spot breaks, but this also happens due to load changes; the absolute load would first bend the hook.

Finally the advantage of modern alloys against steel is that they can bear a higher number of load changes, but no infinite number. So they live longer but not eternally, i.e. they break later, but not never. However, if the truth is searched, advertising is not the best source.

Regards, Roland Ranfft
 
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