同軸擒縱
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同軸擒縱(英語:Co-axial escapement),是一種由英國鐘表大師喬治·丹尼爾斯於1974年發明的擒縱裝置。
概觀
[编辑]於1974年,由英國表匠喬治·丹尼爾斯發明[1],並於1980年註冊專利,[2] 同軸擒縱建基於槓桿擒縱並加以改良,大大減低了能量流失的情況。這項發明被公認為槓桿擒縱之後,鐘錶技術上的一大突破。同軸擒縱內含三層式同軸擒縱輪,能夠將鎖定功能與脈衝分開,從而免除了槓桿擒縱的滑動阻力,棘爪與棘爪之間亦無需添加潤滑油。[3][4]
關鍵改變
[编辑]喬治·丹尼爾斯發明的關鍵改變,在於它剔除了滑動磨擦的組件(即棘爪於擒縱齒輪上的滑動)。僅餘的阻力為無法於一個脈衝周期內維持幾何完整所產生。[5]
商業應用
[编辑]該系統於1999年首先由歐米茄錶公司作大規模生產。 [6]最初的“Caliber 2500”机芯的振荡频率为每小时28,800次,即每秒8次。但是它的后续表款“Caliber 2500C”的振荡频率为每小时25,200次,即每秒7次。尽管高频率的机芯走时更为精准,但是会造成更大的滑动摩擦,对机芯关键部位磨损增加,欧米茄最后决定采用低频的机芯。
参考资料
[编辑]- ^ Daniels, George. About George Daniels. Daniels London. [2008-06-12]. (原始内容存档于2011-02-01).
- ^ Thompson, Curtis. Where George Daniels shopped the Co-Axial.... Chuck Maddox home page. 2001 [2008-06-12]. (原始内容存档于2008-06-15). 17 June 2001 Addendum
- ^ Nicolet, J.C. Could you explain the mechanism of the coaxial watch?. Questions in Time. Europa star online. 1999 [2008-06-12]. (原始内容存档于2010-04-21).
- ^ Odets, Walt. The Omega Coaxial: An impressive achievement. The Horologium. TimeZone.com. 1999 [2008-06-12]. (原始内容存档于2008-06-11).
- ^ Woodward, P., Performance of the Daniels Coaxial Escapement, Horological Journal, August 2004, pages 283-285, at page 283
- ^ Zbinden, H., Zbinden, H., Of Larger Balances, High Beat and Important Oils, TZ Classics No. 1591,Timezone, Dec. 26, 2000, quoting Odets, W.
外部链接
[编辑]- Description and animation of Omega's co-axial escapement (页面存档备份,存于互联网档案馆)
- The Omega Co-axial:An Impressive Achievement by Walt Odets
- Performance of the Daniels Coaxial Escapement by Phillip Woodward
- Questions in Time column about the history leading to the co-axial escapement(页面存档备份,存于互联网档案馆) by Professor J.C. Nicolet
- Clear images, and an animation, of the co-axial escapement (页面存档备份,存于互联网档案馆) by Siméon Lapinbleu
- line drawing animation of the daniels co-axial escapement (页面存档备份,存于互联网档案馆) Mark Headrick's Horology Page
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