Horology

lunisolar calendar

thumb|right|SSW facing, vertical declining sundial on the Moot Hall in Aldeburgh, Suffolk, England. The gnomon is a rod that is very narrow, so it functions as the style. The Latin motto loosely translates as "I only count the sunny hours." [[File:Melbourne sundial at Flagstaff Gardens.JPG|thumb|right|A horizontal dial commissioned in 1862, the gnomon is the triangular blade. The style is its inclined edge.

time standard

REDIRECT Chronometry

idealized concept of a pendulum

portable timepiece

The Zytglogge (Bernese German: ; ) is a landmark medieval tower in Bern, Switzerland. Built in the early 13th century, it has served the city as a guard tower, prison, clock tower, centre of urban life and civic memorial.

thumb|280px|Tourbillon movement (:File:Stuhrling Tourbillon Movement.ogv|high resolution)

time-signalling device

Mechanism used in chess

English mathematician

signal used as a reference to determine the time of day

clock that shows the time in various cities around the world

thumb|An uncoiled modern watch mainspring. thumb|Clock mainspring thumb|A pendulum clock|pendulum wall clock movement showing the two mainsprings which power it. This is a [[striking clock which sounds the hours on a chime; one of the springs powers the timekeeping gear train while the other powers the striking train]]

Elinvar is a nickel–iron–chromium alloy notable for having a modulus of elasticity which does not change much with temperature changes.

economic upheavals caused by the advent of quartz watches in the 1970s and early 1980s

instrument used to measure the velocity of a projectile fired from a firearm

events occurring regularly, or at equal time intervals

watchmaker (1813-1889)

In mechanical horology, a remontoire (from the French remonter, meaning 'to wind') is a small secondary source of power, a weight or spring, which runs the timekeeping mechanism and is itself periodically rewound by the timepiece's main power source, such as a mainspring. It was used in a few precision clocks and watches to place the source of power closer to the escapement, thereby increasing the accuracy by evening out variations in drive force caused by unevenness of the friction in the geartrain. In spring-driven precision clocks, a gravity remontoire is sometimes used to replace the uneve

Nivarox, also known as Nivarox - FAR SA is a Swiss company formed by a merger in 1984 between Nivarox SA and '''Fabriques d'Assortiments Réunis (FAR)'''. It is currently owned by the Swatch Group. Nivarox is also the trade name of the metallic alloy from which its products are fabricated. Its notable property is that its coefficient of elasticity is remarkably constant with temperature. Nivarox is most famous for producing hairsprings that are attached to the balance wheel inside a mechanical watch movement, as well as mainsprings which provide the motive power for the watch.

British scientific competition

conical pulley-and-chain component in mechanical timepieces

machine that acoustically measures the ticks of a mechanical watch

sundial listing the canonical hours

Swedish clockmaker (1824-1890)

maker of watch movements