====== Pellaton winding system ======
The **Pellaton winding system** is a special construction of a winding mechanism.

===== Description =====
This system of an [[automatic|automatic winding]] was developed by the then technical director at [[IWC]], [[Pellaton, Albert|Albert Pellaton]]. It was patented in [[1946]] and completed in [[1950]]. The first movements to feature the Pellaton winding system were IWC's [[IWC 81|Cal. 81]] and [[IWC 85|Cal. 85]], introduced in 1950. It would continue in use through the [[quartz crisis]] and was reintroduced in the 2000's in the [[IWC 89000|Cal. 89000 family]].

The Pellaton winding system uses [[pawl]]s rather than direct gearing between the rotor and barrel. This helps isolate the gear train from shocks. Unlike the [[Seiko]] [[magic lever]] system, which uses one pawl to "pull" and another to "push" the barrel, the IWC Pellaton system has both pawls pull on the barrel. This makes winding more efficient.

===== See also =====
  * {{tagpage>Pellaton_movements|Pellaton movements}}

===== Literature =====
  *Armbanduhren-Spezial IWC - Geschichte, Design, Technik; Author Jörg M. Mehltretter; ISBN 3898800458

===== Weblinks =====
  *[[http://www.timezone.com/library/itsabouttime/itsabout0002|Explanation of the pellaton winding system]]


{{tag>Terms Pellaton_movements}}