EP 0875807 B1 20020417 - Electronic timepiece powered by a generator driven by a mechanical energy source
Title (en)
Electronic timepiece powered by a generator driven by a mechanical energy source
Title (de)
Elektronisches Uhrwerk gespeist von einem Generator, der durch eine mechanische Energiequelle angetrieben wird
Title (fr)
Pièce d'horlogerie électronique alimentée par un générateur entraîné par une source d'énergie mécanique
Publication
Application
Priority
CH 98397 A 19970428
Abstract (en)
[origin: EP0875807A1] The spring (2) drives a two pole permanent magnet (3a) through a gear train (4) which is also linked to the timepiece hands (6). A stator coil (3b) generates an alternating potential (Ug) which supplies a rectifier (5) to produce a direct potential (Ua) to supply electronic regulating circuits (7) and charge a battery (28). The electronic regulating circuits (7) include a comparator (8) which produces an output signal (SM) synchronised with the rotor voltage (Ug) and an oscillator (9) which supplies a reference signal (SR). A series of electronic units and gates cause either one transistor (16) to short circuit the rotor (3b) and slow the clock or another transistor (27) to conduct pulses and speed it up as required by the comparison between actual speed and oscillator reference speed.
IPC 1-7
IPC 8 full level
G04C 10/00 (2006.01); G04C 11/00 (2006.01)
CPC (source: EP)
G04C 10/00 (2013.01); G04C 11/00 (2013.01)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0875807 A1 19981104; EP 0875807 B1 20020417; DE 69712034 D1 20020523; DE 69712034 T2 20021121
DOCDB simple family (application)
EP 97110538 A 19970627; DE 69712034 T 19970627