A device invented to eliminate errors of rate in the vertical position. It consists of a mobile carriage or cage carrying all parts of the escapement, with the balance in the center. The escape pinion turns around a fixed fourth wheel. The case makes one revolution per minute, annulling errors of rate in the vertical position.
A complication designed to eliminate or substantially reduce positional timing errors due to the effects of gravity or unbalanced friction. The invention consists of mounting the entire escapement on a platform or mobile carriage which rotates on its axis within a given time period. Since any positional errors are reproduced at regular intervals, they tend to cancel eachother out.
A device in a mechanical watch that eliminates timekeeping errors cause by the slight difference in the rates at which a watch runs in the horizontal and vertical positions. The tourbillon consist of round carriage, or cage, holding the escapement and the balance. It rotates continously at the rate of once per minute.
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Small but costly mechanism within a mechanical watch that helps eliminate potential time errors.
Invention by Breguet for nullifying vertical position errors by means of a revolving platform which goes through all such positions, so that they neutralize each other.
Device invented to eliminate errors of rate in the vertical positions. It consists of a mobile carriage or cage carrying all the parts of the escapement, with the balance in the centre. The escape pinion turns about the fixed fourth wheel. The case makes one revolution per minute, thus annulling errors of rate in the vertical positions.
A complex piece of micro-engineering which results in the escapement of a watch rotating on its own axis; the object of the exercise is to cancel out the variations in running regularity which can be caused by the watch being in different positions; (a watch may gain in one position yet lose in another).
A construction system in a mechanical watch that eliminates timekeeping errors caused by the slight difference in rates at which a watch runs in the horizontal and vertical positions. A rare and sophisticated feature.
A watch with a revolving carriage that rotates once a minute, changing the center of gravity in order to negate the effects of the watch being in various positions.
A regulating device that cancels the effects of gravitation on the precision of a watch movement by rotating the balance, lever and escapement around a single axis. The mechanism that even in its most conventional version, is extremely hard to manufacture.
Device invented in 1801 by A. L. Breguet. This function equalizes position errors due to changing positions of a watch and related effects of gravity. Balance, balance spring and escapement are housed inside a carriage (s.), also called a cage, rotating by one revolution per minute, thus compensating for all the possible errors over 360. Although this device is not absolutely necessary for accuracy purposes today, it is still appreciated as a complication of high-quality watches.
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on of the most complex mechanisms that corrects errors in timekeeping due to the effect of gravity on a watch in vertical positions: in a regular escapement/balance mechanism, the center of gravity shifts, depending on the position of the watch in space (horizontal, vertical, or any imaginable angle), thus affecting its rate. With the tourbillon, the escapement is mounted on a carriage that rotates once per minute, so the center of gravity will be situated alternatively a little high for half the time and little low for the other half, and these errors will cancel each other. The tourbillon was invented in 1795 and patented in 1801 by one of the most prominent watchmakers in history—Abraham-Louis Breguet.
French for "whirlwind". The balance, pallet, and escape wheel are mounted in a rotating carriage which generally makes one rotation per minute. The purpose of the "tourbillon" is to average the errors in the vertical positions. Patented by Breguet on June 26, 1801.
A technically demanding device to compensate for the interference of gravity on the balance and thus improve the watch's rate.
a complicated mechanical movement designed to be more accurate by eliminating errors of motion due to gravity's effect on the movement. It has a cage that holds the escapement and balance in the center which rotates once a minute, canceling out gravity's effect on the mechanism's rotation.
A tourbillon (IPA: , French for "whirlwind") is a type of mechanical clock or watch escapement invented in 1795 by Abraham-Louis Breguet that is designed to counter the effects of gravity and other perturbing forces that can affect the accuracy of a chronometer. This is accomplished by mounting the escapement in a rotating frame, so that the effect of gravity cancels out when the escapement is rotated 180°. The effects of gravity were particularly problematic when pocketwatches were carried in the same pocketed position for most of the day.