翻译征稿

        怀表是舶来品，绝大多数的资料都是外文，这增加了咱国内表友学习怀表知识的难度。现有热心表友挺身而出，主动免费为表友们翻译英文资料，如果大家有想学习而又看不明白的材料，可以发到这个帖子里面让这位热心表友帮忙翻译。不过这是义务劳动，大家在时限等方面就无需要求太苛了，这位表友会抓紧时间帮大家翻译的。

Howard 12S 17J adj谢谢

翁哥，其实您可以把需要翻译的文件直接放到这里，PM固然可以，但是这么好的咨询贴就这样沉下去就有点可惜了。

DVC-PRO 发表于 2013-3-20 21:13
Howard 12S 17J adj谢谢

霍华德、12 尺寸、17颗宝石、校正。

nomorewatch 发表于 2013-3-23 07:01
翁哥，其实您可以把需要翻译的文件直接放到这里，PM固然可以，但是这么好的咨询贴就这样沉下去就有点可惜了 ...

热心人来了，各位可以发起了

xhandy 发表于 2013-3-22 18:00
热心人来了，各位可以发起了

看来大家的积极性还是偏低哦。。。

小闹终于来了，咱们版该热闹了 呵呵

haru 发表于 2013-3-23 17:49
小闹终于来了，咱们版该热闹了 呵呵

谢谢大哥支持，请您把需要翻译的资料全放在回复里，免得帖子下沉，我下次再来的时候会尽量翻译

已完成

已完成

The desire to eliminate lubrication stem from the serious problems of early lubricants and Descarte's theory of involute gears. He showed that with involute gear teeth the action of them was to roll and to keep the contact point on the line of centers. No sliding, no lubricant needed.

Thsi led ot some effort to try tp make escapement with no sliding such as the detent id the impulse jewels are shaped. There is still sliding on the pivots however. Early Harrison time keepers tried to get past that with friction rollers with counter poise but these are not suited for watches.

Daniels claimed his co-axial escapement did not need oil but as built it turned out to need it.

Modern lubricants can be placed very precisely and and have much better properties eliminating most of the reasons for trying to avoid them

Early electric watch used magnetic field to impulse watches so no escapement lubrication was needed bit other parts did need it.

移除

已废弃

已完成

作废

已抽取，翻译中

已抽取

已抽取

in fact some of these boat watches were also timing trial winners. The world's Navies realized by about 1900 that they needed rugged accurate watches for gun boats, as in gun boat diplomacy, and torpedo boats. They set up time trials for these and tested them in one posiiton and various temperatures in Geneva and especially Neuchatel. By about 1915 some of the these makers figured out the the English Teddington trial had no size limits so they started adjusting these in positions and took the top places at the English trials. The Neuchatel makers clobbered the fancy Geneva entries. Ditisheim Movado and Longines ambushed them. The ultra fine adjustment may be transitory but these are rugged relaible watches.

Also many of the finest English movement were cased in heavy silver water proof cases for explorers. These are lovely watches and they are intended to go in distant explorations with late 1800's technology. They are reliable and robust. These custoimers staked their lives on these and if they got lost, there was no GPS or radio and help was not on the way. They needed relaible longitude and these wawtches were what got them back.
Kew moved to Teddington so they are the same. Teddington was open to all so cometition was tougher so I'd prefer a winner from there. That is where the Geneva and Neuchael makers went after each other since most Geneva and Neuchatel competition were limited to locals.

All gave varous classes of certificates but the top levels foremed the competition. Thus a Kew A certicate mean that a watch met their performance standards. These systems all awarded popints for exceeding the minimum standards. Kew/Teddington published the names and data on the top 50 performaers but gave no **s. The Swiss awarded **s for individual watches groups of watches and best regulator. The Swiss certificates have a lot more informationthen Kew Teddington including who did the final adjustment. The rules and scoring were different but the top watch at Teddington had a decent claim as the best in the world.

Swiss **s were based "on a curve" If the top few watches got similar scores they all got first ** and so it went. This was probably reasonable since the differences were within the variation of the watches. If two watches were close another set ot tests might reverse the ranking.

There are enough things to like and dislike about all of them that I don't have a favorite. They did not use modern statstics so the values do not relate to modern theories of error. When they did these tests they had computers but they were humans with pen and paper and sometimes mechanical adding machines.

My favorite test is the the Allan variance which you can learn about at this link. The old Hewlett Packard (they made atomic clocks) application note is there and it's a great read.