overcoiln.

Brit.

/ˈəʊvəkɔɪl/, U.S.

/ˈoʊvərˌkɔɪl/

Origin: Formed within English, by derivation. Etymons: over- prefix, coil n.³

Etymology: < over- prefix + coil n.³

Watchmaking and Clockmaking.

The last coil of a Breguet hairspring, having the outer quarter turn raised and curved towards the centre to improve timekeeping.

ΘΚΠ

the world > time > instruments for measuring time > watch > [noun] > parts of

barrel1591

motion1605

bezel1616

fusee1622

string1638

crown wheel1646

out-case1651

watch-box1656

nuck1664

watchwork1667

balance-wheel1669

box1675

dial wheel1675

counter-potence1678

pendulum-balance1680

watch-case1681

pillar1684

contrate teeth1696

pinion of report1696

watch-hook1698

bob-balance1701

half-cock1701

potence1704

verge1704

pad1705

movable1709

jewel1711

pendant1721

crystal1722

watch-key1723

pendulum spring1728

lock spring1741

watch-glass1742

watch-spring1761

all-or-nothing piece1764

watch hand1764

cylinder1765

cannon?1780

cannon1802

stackfreed1819

pillar plate1821

little hand1829

hair-spring1830

lunette1832

all-or-nothing1843

locking1851

slag1857

staff1860

case spring1866

stem1866

balance-cock1874

watch-dial1875

balance-spring1881

balance-staff1881

Breguet spring1881

overcoil1881

surprise-piece1881

brass edge1884

button turn1884

fourth wheel1884

fusee-sink1884

pair-case1884

silver bar1884

silver piece1884

slang1884

top plate1884

karrusel1893

watch-face1893

watch bracelet1896

bar-movement1903

jewel pivot1907

jewel bearing1954

1881 F. J. Britten Watch & Clockmakers' Handbk. (ed. 4) 63 The overcoil of a Breguet spring..is sometimes carried much farther into the spring. In some springs it is not unusual to see the overcoil more than a complete turn in extent.

1884 F. J. Britten Watch & Clockmakers' Handbk. (new ed.) 181 Overcoil, the last coil of a Bréguet spring which is bent over the body of the spring.

1929 G. H. Baillie Watches vii. 168 Properly, a Breguet spring should have no regulating curb pins, because the curve of the overcoil is correct only when it is of one definite length.

1948 A. L. Rawlings Sci. Clocks & Watches (ed. 2) ix. 179 By making the overcoil the right shape, it is possible to cause the spring to dilate equally all round as the balance swings; or, by modifying the shape, it can be caused to dilate most in one direction like a flat spring.

1984 Antiquarian Horol. Dec. 149/2 The balance spring has a self-adjusting stud clamped by a cover and has a Breguet overcoil.

This entry has been updated (OED Third Edition, December 2004; most recently modified version published online March 2022).

单词	overcoil
释义	overcoiln. Brit. /ˈəʊvəkɔɪl/, U.S. /ˈoʊvərˌkɔɪl/ Origin: Formed within English, by derivation. Etymons: over- prefix, coil n.³ Etymology: < over- prefix + coil n.³ Watchmaking and Clockmaking. The last coil of a Breguet hairspring, having the outer quarter turn raised and curved towards the centre to improve timekeeping. ΘΚΠ the world > time > instruments for measuring time > watch > [noun] > parts of barrel1591 motion1605 bezel1616 fusee1622 string1638 crown wheel1646 out-case1651 watch-box1656 nuck1664 watchwork1667 balance-wheel1669 box1675 dial wheel1675 counter-potence1678 pendulum-balance1680 watch-case1681 pillar1684 contrate teeth1696 pinion of report1696 watch-hook1698 bob-balance1701 half-cock1701 potence1704 verge1704 pad1705 movable1709 jewel1711 pendant1721 crystal1722 watch-key1723 pendulum spring1728 lock spring1741 watch-glass1742 watch-spring1761 all-or-nothing piece1764 watch hand1764 cylinder1765 cannon?1780 cannon1802 stackfreed1819 pillar plate1821 little hand1829 hair-spring1830 lunette1832 all-or-nothing1843 locking1851 slag1857 staff1860 case spring1866 stem1866 balance-cock1874 watch-dial1875 balance-spring1881 balance-staff1881 Breguet spring1881 overcoil1881 surprise-piece1881 brass edge1884 button turn1884 fourth wheel1884 fusee-sink1884 pair-case1884 silver bar1884 silver piece1884 slang1884 top plate1884 karrusel1893 watch-face1893 watch bracelet1896 bar-movement1903 jewel pivot1907 jewel bearing1954 1881 F. J. Britten Watch & Clockmakers' Handbk. (ed. 4) 63 The overcoil of a Breguet spring..is sometimes carried much farther into the spring. In some springs it is not unusual to see the overcoil more than a complete turn in extent. 1884 F. J. Britten Watch & Clockmakers' Handbk. (new ed.) 181 Overcoil, the last coil of a Bréguet spring which is bent over the body of the spring. 1929 G. H. Baillie Watches vii. 168 Properly, a Breguet spring should have no regulating curb pins, because the curve of the overcoil is correct only when it is of one definite length. 1948 A. L. Rawlings Sci. Clocks & Watches (ed. 2) ix. 179 By making the overcoil the right shape, it is possible to cause the spring to dilate equally all round as the balance swings; or, by modifying the shape, it can be caused to dilate most in one direction like a flat spring. 1984 Antiquarian Horol. Dec. 149/2 The balance spring has a self-adjusting stud clamped by a cover and has a Breguet overcoil. This entry has been updated (OED Third Edition, December 2004; most recently modified version published online March 2022). < n.1881
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