====== Jaeger-LeCoultre Duomètre ======
{{wst>image_r|JLC_380|Calibre JLC 380}}
**Duomètre** ("Dual Wing") is a [[double barrel]] mainspring concept from [[Jaeger-LeCoultre]].

Double barrel power concepts generally power the [[gear train]] serially or in parallel, but the Jaeger-LeCoultre Duomètre functions somewhat differently. Rather than combining the power of two [[mainspring]]s, a Duomètre movement uses each mainspring to power a different part of the movement. For example, the [[JLC 380]] movement in the [[Jaeger-LeCoultre Duomètre à Chronographe]] uses one barrel to power the timekeeping functions and another to operate the [[chronograph]] portion.

Although the Duomètre product line is related in concept, not all Duomètre movements share much technology 

  * [[JLC 380|Calibre 380]] ([[2007]] [[Jaeger-LeCoultre Duomètre à Chronographe]]) - One powers timekeeping; the other powers the chronograph
  * [[JLC 182|Calibre 182]] ([[2009]] [[Jaeger-LeCoultre Duomètre à Grande Sonnerie]]) - One powers timekeeping and complications; the other powers the chime
  * [[JLC 381|Calibre 381]] ([[2010]] [[Jaeger-LeCoultre Duomètre à Quantième Lunaire]]) - One powers timekeeping and calendar; the other powers the escapement
  * [[JLC 382|Calibre 382]] ([[2012]] [[Jaeger-LeCoultre Duomètre à Sphérotourbillon]]) - One powers timekeeping and calendar; the other powers the escapement
  * [[JLC 383|Calibre 383]] ([[2013]] [[Jaeger-LeCoultre Duomètre Unique Travel Time]]) - One barrel powers each timezone
  * [[JLC 389|Calibre 389]] ([[2015]] [[Jaeger-LeCoultre Duomètre Sphérotourbillon Moon]]) - One powers timekeeping, calendar, and [[moon phase indicator]]; the other powers the escapement


{{tag>Jaeger-LeCoultre_Duomètre_calibres Jaeger-LeCoultre_calibres Jaeger-LeCoultre}}