Federwelle und Zugfeder

Details

Veröffentlichungs-Nr.

EP2657794

Aktenzeichen

EP12165537

Anmeldetag

25. April 2012

Veröffentlichung

1. Februar 2017

Erteilung

1. Februar 2017

Rechtsraum

EP

IPC

G04B1/16G04B1/18

Abstract

The method involves machining or turning a complete external contour of a barrel arbor (1) in a touching-up operation of a drawn bar (50) about a touching-up axis (DC) parallel to or merged with a drawing direction. A groove (33) is machined in the touching-up operation, where width of the groove is adjusted along direction of the touching-up axis to hold an inner coil of a mainspring in the direction of the touching-up axis on a point on revolution of the groove and the groove is tangent to a profile in shape of a snail in a zone relative to the axis of revolution of the groove. The touching-up operation is a bar turning operation.

Anmelder

Firma

ETA SA Manufacture Horlogère Suisse

Land

🇨🇭 Schweiz

Fachgebiete