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賴凱文
白金會員

註冊時間: Aug 07, 2006
文章: 3086

發表於: 星期五 2007-10-12 21:33

真是漂亮又完整的收藏
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賴凱文

joechen99
分區版面管理員

註冊時間: Jun 04, 2004
文章: 6206
來自: 新北市永和區

發表於: 星期五 2007-10-12 21:36

alex668 寫到:
差點忘了!我這個鐵道迷也是有鐵路錶雖然廉價多了但也是機械錶

感謝 alex668 大哥的捧場，

這隻瑞士鐵路錶小弟也曾經擁有過，在一次錶聚送出模彩了。
_________________
Chen, Joe 陳舊；成就；玖乘玖玖

joechen99
分區版面管理員

註冊時間: Jun 04, 2004
文章: 6206
來自: 新北市永和區

發表於: 星期五 2007-10-12 21:49

二問錶寫到:
恭賀久哥榮任鐵路局長! 還好小弟也有一支"小"鐵道錶

感謝二問錶大哥的蒞臨

這隻就是您大哥縱貫線鐵路大長官的鐵路錶

(感謝上次錶聚借小弟拍照)

_________________
Chen, Joe 陳舊；成就；玖乘玖玖

Wai
進階會員

註冊時間: Nov 29, 2005
文章: 428
來自: USA

發表於: 星期五 2007-10-12 21:52

Found this little history on Wikipedia about Railroad watches:
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Railroad chronometers (railroader's watches) are specialized timepieces that once were crucial for safe and correct operation of trains in the United States and Canada. A system called Timetable and Train Order, which relied on highly accurate timekeeping, was used to ensure that two trains could not be on the same stretch of track at the same time.

After a serious train accident in Ohio in 1891, caused by the malfunction of an engineer's watch, the North American railroad industry charged its General Time Inspector, Webb C. Ball, to establish unified standards for all the watches used by personnel among the participating railroad companies:

- only American-made watches may be used (depending on availability of spare parts)
- only open-faced dials, with the stem at 12 o’clock
- minimum of 17 functional jewels in the movement, 16 or 18-size only
- maximum variation of 30 seconds (approximately 4 seconds daily) per weekly check
- watch adjusted to five positions (face up, face down, crown up, crown down, or sideways)
- adjusted for severe temperature variance and isochronism (variance in spring tension)
- indication of time with bold legible Hindu-Arabic numerals, outer minute division, second dial, heavy hands,
- lever used to set the time (no risk of having the stem left out, thus inadvertently setting the watch to an erroneous time)
- Breguet balance spring
- micrometer adjustment regulator
- double roller
- steel escape wheel
- anti-magnetic protection (after the advent of diesel locomotives)
- jim-proof

The Waltham Watch Company quickly complied with the requirements of Ball's guidelines, as soon did the Ball Watch Company, Elgin Watch Company, Hamilton Watch Company, Illinois Watch Company and most of the other American watch manufacturers, all applying the American System of Watch Manufacturing.

The Time Signal Service of the United States Naval Observatory was used to ensure accuracy of railroad chronometers and schedule American rail transport.

The minimum requirements were raised several times as watch-making technology progressed, and the watch companies produced newer, even more reliable models. By WWII, many railroads required watches that were of a much higher grade (as many as 23 jewels, for example) than those made to comply with the original 1891 standard.