Hairspring with two spiral springs with improved isochronism

The spring (1) has hairsprings (3, 5) comprising curves extending in planes, where each curve has continuously variable pitch. The curves are symmetrical relative to a straight line (A) parallel to the planes, and pass through a median projection plane (P) of an attachment element (4). Each curve is...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	Helfer, Jean-Luc, Trümpy, Kaspar
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	HOROLOGY MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL MECHANICALLY-DRIVEN CLOCKS OR WATCHES PHYSICS TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
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