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mainspring    
n. 主发条;主要原因

主发条;主要原因

mainspring
n 1: the most important spring in a mechanical device
(especially a clock or watch); as it uncoils it drives the
mechanism

mainspring \main"spring`\, n.
The principal or most important spring in a piece of
mechanism, especially the moving spring of a watch or clock
or the spring in a gunlock which impels the hammer. Hence:
(Fig.) The chief or most powerful motive; the efficient cause
of action; as, the mainspring of action.
[1913 Webster]


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  • Mainspring Questions - NAWCC Forums
    I am cleaning a ship’s clock that has a mainspring measuring 7 8”w x 015 thick Not sure I need to replace it as other than being very dirty I was able to give it 3-4 good turns initially My questions are -other than a spring being broke how does one know when the spring still has enough
  • Mainspring winder sizing. - NAWCC Forums
    Hi I am new to pocket watch workings etc I have a watch that has a broken mainspring I have managed to get the correct spring However I need to replace the barrel also I would like to purchase a mainspring winder The watch is a waltham size 16 The case of the mainspring measures dia 19 4mm The spigot ? 2 25 dia
  • vintage watch mainspring questions - NAWCC Forums
    The mainspring seems to be the first culprit when encountering running issues, and, if the correct size*, is rarely the cause Nivaflex springs have a very small advantage (single digit percent) of modulus of elasticity over steel, and the reverse curve helps a little too, but if a steel spring opens up larger than the movement diameter, going
  • 400-day clocks - mainspring matters - NAWCC Forums
    With a below-par mainspring, any tiny increase in resistance from a microscopically bent tooth, out-of-round wheel, tight or bent pivot, or even a speck of dirt can absorb whatever surplus torque remains from the spring, and the clock stops, in the same way as the ‘cliff edge’ manner in which a digital transmission system fails
  • Replacing mainspring on Kienzle Westminster movement
    That leaves a broken mainspring as being the problem or one that has become unhooked If broken, there would be other possible, but very likely, damage to the train that would require full disassembly to inspect First, I would do as Roughbarked suggests I agree it might be possible to pull the mainspring arbor and have the barrel drop out
  • Reforming a mainspring, - NAWCC Forums
    Yield point is the definition of a specific point in a material under stress where the internal structure is changed, never to return When a mainspring or any other cold-formed spring, whether flat, round or some other cross section, is shaped, it is necessarily deformed but the structure of the material remains the same and therefore un-yielded
  • Need help finding a mainspring for a New York standard 6s
    OK If the old blue steel mainspring hasn't broken by now, it is unlikely to unless exposed to moisture or mishandled However a new mainspring wouldn't go astray If you have to adapt a mainspring to have a hole, You will need to know about annealing the end of the spring so that the work can be done without causing the metal to break
  • how to measure mainspring - NAWCC Forums
    hello i need to order a new mainspring for my pocket watch h 2 5 thickness 0 3 L 590MM,BUT i am not sure about the diameter of spring barrel, do i measure inside barrel or outside My old spring had a rectangular slot about 3mm x 1 5 which fitted to the arbor,to other end was completely folded over which locked against barrel by small stop,is
  • Mainsprings sizings and how to decide which one to have
    Vespa, I think that the advice that you have been given by both Skutt and Graham is good advice Just to add a wee bit more information to help you determine which mainspring to go for I offer the following link to the NAWCC Horology Index that will, given the inside diameter of the barrel, the outside diameter of the barrel arbor and the thickness of the required spring, calculate the length
  • Help with a mainspring winder - NAWCC Forums
    I am using a mainspring winder for the first time I am working on an Ansonia I have come across two problems that I cannot figure out I have seen several videos on how to use the winder, but none on how to remove the mainspring clamp after the spring has been placed back into position One problem I am having is I cannot fully wind the spring





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