Watch Glossary and Terms with Images

Tempering increases mechanical resistance by reducing the brittleness induced by quenching.TerminageFrench term denoting the process of assembling watch parts for the account of a producer.TermineurFrench term for an independent watchmaker (or workshop) engaged in assembling watches, either wholly or in part, for the account of an "établisseur" or a "manufacture", who supply the necessary loose parts.Time zoneIn order to standardise time measurement in each country, since 1883 the Earth has been divided into twenty-four time zones, the first of which is intersected by the Greenwich meridian, which is the prime or zero meridian. Each point within a given time zone has the same legal time.TimerInstrument used for registering intervals of time (durations, brief times), without any indication of the time of day.ToothA projection on the edge of a gear, escapement wheel, ratchet wheel, etc.TourbillonDevice invented to eliminate errors of rate in the vertical positions.A technology that uses quartz crystal oscillators working with an integrated circuit, assuring up to 10 times more accuracy than a conventional quartz watch.T ImagesTachometerInstrument for measuring speed. In watch***, a timer or chronograph with a graduated dial on which speed can be read off in kilometres per hour or some other unit (see timer).TelemeterStopwatch or chronograph function with a scale that measures the distance of something from the wearer of the watch through the amount of time it takes sound to travel.TemperHeat treatment after quenching whereby metal is heated then slowly cooled.