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Glossary

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Term Definition
PERPETUAL CALENDARIndicates the day of the week, the date, the month and the phases of the moon and Automatically allows for varying lengths of months, as well as leap years - No manual correction is necessary.
 
POINT OF ATTACHMENT SPRINGINGTo a watchmaker, this expression means the point of attachment of the balance spring to the collet is located in the most favorable position to ensure good performance in the vertical positions.
 
POISEWatchmakers say that a balance is "in poise" when the balance is in neutral equilibrium, as verified on the poising tool for example.
Its significance is that the center of gravity lies on the axis of rotation.
 
POSITIONAL ERRORDifference between the rates of the watch in various positions.
 
PULSOMETERA timer or chronograph with a graduated dial or bezel used to indicate the number of heart beats per minute. This is done by measuring the time taken for a fixed number of beats to occur.
 
QUARTZCrystalline silica; under certain conditions, pieces cut from quartz crystals can be maintained in rapid oscillation of very stable frequency. For this reason they are used in clocks, timing machines & many other applications.
 


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