EP 0021494 B1 19841128 - ELECTRONIC CLOCK WITH TIME INDICATION BY HANDS AND WITH A ROTATION DETECTING MEMBER
Title (en)
ELECTRONIC CLOCK WITH TIME INDICATION BY HANDS AND WITH A ROTATION DETECTING MEMBER
Publication
Application
Priority
CH 604779 A 19790628
Abstract (en)
[origin: US4348752A] The watch comprises a detecting device including a resilient blade, the free end of which cooperates with a disk. When a slot in the edge of the disk is oriented in the direction of the blade, the latter vibrates owing to its own resiliency. The two edges of the slot are preferably bent in opposite directions in order to increase the bending stress on the blade just before its abrupt release into the slot. A piezoelectric strip fixed to the blade registers voltage fluctuations, the polarity of which corresponds to the direction in which the blade moves.
IPC 1-7
IPC 8 full level
G01D 5/12 (2006.01); G01D 5/245 (2006.01); G01P 13/04 (2006.01); G04C 3/00 (2006.01); G04C 3/14 (2006.01); G04C 9/00 (2006.01)
CPC (source: EP US)
G04C 3/14 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0021494 A1 19810107; EP 0021494 B1 19841128; CH 629356 B; CH 629356G A3 19820430; DE 3069694 D1 19850110; JP S5631676 A 19810331; JP S628158 B2 19870220; US 4348752 A 19820907
DOCDB simple family (application)
EP 80200529 A 19800609; CH 604779 A 19790628; DE 3069694 T 19800609; JP 8340980 A 19800619; US 15820480 A 19800610