Verfahren zur Befestigung des inneren Endes einer Uhrfeder an einem Stift,Vorrichtung fuer die Anwendung des Verfahrens und mit diesem Verfahren erhaltene versplintete Feder

摘要

The balance spring and the collet are held in precise positions on a work table so that the upper edge of the inner end of the spring is flush with an upper face of the collet and at least sufficiently near to the latter to enable a laser beam aimed at this zone to weld together the collet and the spring.