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(2) 400 Day Brass Anniversary Dome Clock 3.5\" Legs Post Support Pipes Stand (J) For Sale
![(2) 400 Day Brass Anniversary Dome Clock 3.5\](img-large/g/uI8AAOSwPoRkdLw2/s-l1600/-2-400-Day-Brass-Anniversary-Dome-Clock-3-5-Legs-P.jpg "(2) 400 Day Brass Anniversary Dome Clock 3.5\")
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(2) 400 Day Brass Anniversary Dome Clock 3.5\" Legs Post Support Pipes Stand (J):
$13.99
(Qty 2) Brass Legs Post 400 Day Anniversary Mantel Clock Parts
includes brass legs, threaded rods, brass finials and nutsSize - Approximately 3-1/2\" Long
Spiral DesignThis item was removed from a German Made Mantel Clock.
It retains its brass tarnished and can be cleaned up or left as found
Please see pictures. Thanks!
Made in GermanySOLD AS IS - NO RETURNS
For Parts, Restoration or Repair.
These Legs, Post, Pole, Base, Pedestal, Stands, Support, Brace, Pipes, may work with other German 400 Day 4 Ball Anniversary Disc Pendulum clock, including Kieninger, Kundo, Schatz, Jahresuhrenfabrik, Kern, Koma, Herr, Reiner, Henn, Haller, Wurthner, Hermle, Kaiser, Becker, Master
Make sure you jointhe National Association of Watch and Clock Collectors.
It\'s a great way tomeet other clockmakers. About 400-day clocks torsion pendulumclock, anniversary clock, 400-day clock,mechanical torsion pendulum. weighted disk or wheel, decorative wheel with 3 or4 chrome balls on ornate spokes, suspended by a thin wire or ribbon called a torsionspring (also known as \"suspension spring\"). The torsion pendulumrotates about the vertical axis of the wire, twisting it, instead of swinginglike an ordinary pendulum. The force of the twisting torsion spring reversesthe direction of rotation, so the torsion pendulum oscillates slowly, clockwiseand counterclockwise. The clock\'s gears apply a pulse of torque to the top ofthe torsion spring with each rotation to keep the wheel going. The wheel andtorsion spring function similarly to a watch\'s balance wheel and hairspring, asa harmonic oscillator to control the rate of the clock\'s hands.Torsion clocksare usually delicate, ornamental, spring-wound mantel clocks. The polishedclock mechanism is exposed under a glass case or dome, to allow people to watchthe torsion pendulum turn. Clocks of this style, first made by Anton Harderaround 1880, are also known as 400-day or anniversary clocks, because many canrun for an entire year on a single winding. This does not mean they will keepaccurate time the whole year. It\'s best to wind the clock once a month. Butsome models will run up to 1000 days on a single winding.Torsion clocks arecapable of running much longer between windings than clocks with an ordinarypendulum, because the torsion pendulum rotates slowly and takes little energy.However they are difficult to set up and are usually not as accurate as clockswith ordinary pendulums. One reason is that the oscillation period of thetorsion pendulum changes with temperature due to temperature-dependent changein elasticity of the spring. The rate of the clock can be made faster or slowerby an adjustment screw mechanism on the torsion pendulum that moves the weightballs in or out from the axis. The closer in the balls are, the smaller themoment of inertia of the torsion pendulum and the faster it will turn, like aspinning ice skater who pulls in her arms. This causes the clock to speedup.One oscillation of the torsion pendulum usually takes 12, 15, or 20 seconds.The escapement mechanism, that changes the rotational motion of the clock\'sgears to pulses to drive the torsion pendulum, works rather like an anchorescapement. A crutch device at the top of the torsion spring engages a leverwith two anchor-shaped arms; the arms in turn alternately engage the teeth ofthe escape wheel. As the anchor releases a tooth of the escape wheel, thelever, which is fixed to the anchor, moves to one side and, via the crutch,gives a small twist to the top of the torsion spring. This is just enough tokeep the oscillation going.The Atmos clock, made by Jaeger Le Coultre, is atype of torsion clock which doesn\'t need to be wound or powered at all. Themainspring which turns the clock\'s wheels is kept wound by small changes inatmospheric pressure and/or local temperature, using a bellows mechanism. Thusno winding key or battery is needed, and it can run for years without humanintervention.The torsion pendulum was invented by Robert Leslie in 1793. Thetorsion pendulum clock was first invented and patented by American Aaron Cranein 1841. He made clocks that would run up to one year on a winding. He alsoattempted to make precision astronomical regulator clocks based on the torsionpendulum, but only four sold.The German Anton Harder apparently independentlyinvented and patented the torsion clock in 1879-1880. He was inspired bywatching a hanging chandelier rotate after a servant had turned it to light thecandles. He formed the firm Jahresuhrenfabrik (\'Year Clock Factory\') and designeda clock that would run for a year, but its accuracy was bad
a movement, also known as a caliber or calibre (British English), is the mechanism of a watch or timepiece, as opposed to the case, which encloses and protects the movement, and the face, which displays the time. The term originated with mechanical timepieces, whose clockwork movements are made of many moving parts.
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