EP 3479175 A1 20190508 - MECHANICAL CLOCK MOVEMENT
Title (en)
MECHANICAL CLOCK MOVEMENT
Title (de)
MECHANISCHER FEDERANTRIEB
Title (fr)
MOUVEMENT D'HORLOGERIE MECANIQUE
Publication
Application
Priority
- EP 16176831 A 20160629
- IB 2017053706 W 20170621
Abstract (en)
[origin: WO2018002778A1] The invention proposes a clock movement comprising a rotary oscillator (4), a rotary impulse arm (12) for imparting pulses of mechanical energy to the oscillator (4), an energy source (1) and a transmission device (1 – 3) connecting the energy source (1) to the impulse arm (12), the transmission device (1 – 3) comprising a constant-force device (10) for periodically storing a quantity of energy to be supplied to the impulse arm (12). The said amount of energy, the geometry of the impulse arm (12) and the moments of inertia of the impulse arm (12) and of the oscillator (4) are chosen so that each time the impulse arm (12) imparts an impulse to the oscillator (4), the following relationship (I) is more or less satisfied, where I1 is the moment of inertia of the impulse arm (12), I2 is the moment of inertia of the oscillator (4), ω1i is the angular velocity of the impulse arm (12) just prior to the impulse it imparts to the oscillator (4), ω2i is the angular velocity of the oscillator (4) just prior to the said impulse, d1 is the lever arm of the impulse arm (12) and d2 is the lever arm of the oscillator (4). The invention also proposes a clock movement of the same type with an impulse arm that moves linearly and methods for achieving these movements.
IPC 8 full level
G04B 1/22 (2006.01); G04B 15/10 (2006.01); G04B 15/14 (2006.01)
CPC (source: EP)
G04B 1/225 (2013.01); G04B 15/10 (2013.01); G04B 15/14 (2013.01)
Citation (search report)
See references of WO 2018002778A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2018002778 A1 20180104; EP 3479175 A1 20190508; EP 3479175 B1 20221109
DOCDB simple family (application)
IB 2017053706 W 20170621; EP 17733911 A 20170621