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同軸擒縱

同軸擒縱

同軸擒縱(英語:Co-axial escapement),是一種由英國鐘表大師喬治·丹尼爾斯英语George Daniels (watchmaker)於1974年發明的擒縱裝置

概觀

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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

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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

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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

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  1. ^ Daniels, George. About George Daniels. Daniels London. [2008-06-12]. (原始内容存档于2011-02-01). 
  2. ^ 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
  3. ^ 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). 
  4. ^ 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). 
  5. ^ Woodward, P., Performance of the Daniels Coaxial Escapement, Horological Journal, August 2004, pages 283-285, at page 283
  6. ^ 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

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同軸擒縱
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