EP 0960361 A1 19991201 - WHEEL WORK PART COMPRISING A CAPACITIVE SENSING DEVICE
Title (en)
WHEEL WORK PART COMPRISING A CAPACITIVE SENSING DEVICE
Title (de)
UHRWERK MIT KAPAZITIVER DETEKTIONSVORRICHTUNG
Title (fr)
PIECE D'HORLOGERIE COMPORTANT UN DISPOSITIF DE DETECTION CAPACITIF
Publication
Application
Priority
- CH 9800057 W 19980216
- FR 9701813 A 19970217
Abstract (en)
[origin: FR2759792A1] The invention concerns a wheel work part (51) comprising a rotary mobile (1) and a contactless electric sensing device for detecting the positions and/or movements of said mobile. In order to avoid the problems arising from standard systems with electric switches, the sensing device comprises at least a capacitive sensor (55, 56) having one or several fixed electrodes (59, 60) and a toothed rotor (57, 58) driven by said mobile, and electronic sensing means sensitive to variations in capacitance of said sensor. The device may have two capacitive sensors (55, 56) with output signals in quadrature for indicating the direction of the rotation of the mobile. This mobile can be a control stem (1) for time setting, or another component such as a watch hand stem.
IPC 1-7
IPC 8 full level
G04C 3/00 (2006.01); G04C 3/14 (2006.01); G04G 21/00 (2010.01); G04G 21/08 (2010.01)
CPC (source: EP US)
G04C 3/007 (2013.01 - EP US); G04C 3/14 (2013.01 - EP US); G04G 21/08 (2013.01 - EP US)
Citation (search report)
See references of WO 9836332A1
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
FR 2759792 A1 19980821; FR 2759792 B1 19990416; CN 1119724 C 20030827; CN 1248332 A 20000322; DE 69817536 D1 20031002; DE 69817536 T2 20040624; DE 69817536 T8 20041230; EP 0960361 A1 19991201; EP 0960361 B1 20030827; HK 1024064 A1 20000929; JP 2001524206 A 20011127; TW 342472 B 19981011; US 6252825 B1 20010626; WO 9836332 A1 19980820
DOCDB simple family (application)
FR 9701813 A 19970217; CH 9800057 W 19980216; CN 98802602 A 19980216; DE 69817536 T 19980216; EP 98901919 A 19980216; HK 00103330 A 20000601; JP 53519798 A 19980216; TW 87102178 A 19980217; US 36753599 A 19991101