EP 1654597 B1 20091111 - THERMALLY-COMPENSATED BALANCE WHEEL
Title (en)
THERMALLY-COMPENSATED BALANCE WHEEL
Title (de)
UNRUH MIT THERMOKOMPENSATION
Title (fr)
BALANCIER THERMOCOMPENSE
Publication
Application
Priority
- CH 2004000339 W 20040603
- CH 0300547 W 20030813
- CH 21322003 A 20031212
Abstract (en)
[origin: WO2005017631A1] The balance wheel (1) is produced by chemical etching of a sheet of material with a low thermal coefficient of expansion and a low density, such as, for example, diamond on which a number of balance weights (2, 20, 21, 22, 23, 24) are arranged. The form and position of the balance weights is determined such that the variation in the radius of gyration of the balance wheel caused by a variation in temperature is zero or negative, thus providing a balance wheel with a zero or negative thermal characteristic.
IPC 8 full level
G04B 17/22 (2006.01); G04B 17/06 (2006.01); G04B 18/00 (2006.01)
CPC (source: EP)
G04B 17/063 (2013.01); G04B 17/222 (2013.01); G04B 18/006 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005017631 A1 20050224; AT E448509 T1 20091115; DE 602004024076 D1 20091224; EP 1654597 A1 20060510; EP 1654597 B1 20091111
DOCDB simple family (application)
CH 2004000339 W 20040603; AT 04735863 T 20040603; DE 602004024076 T 20040603; EP 04735863 A 20040603