Clock movement for timepiece, has bridge mounted on mainplate using fixation devices and formed from silicon based micro-machinable material plate, where bridge and bearings are formed as single piece to support part of movement

摘要

The movement has a bridge (1) mounted on a mainplate using fixation devices (2, 4, 6), where the bridge is formed from a silicon based micro-machinable material plate. The bridge and bearings (8, 10) are formed as a single piece for supporting a part of the movement. Each bearing comprises a cushion forming hole formed by etching. The bridge has a hole comprising two sections forming a shoulder. The shoulder serves as a stop for a screw head that maintains the bridge against the mainplate. An independent claim is also included for a method for fabricating a bearing in a micro-machinable element.