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Chronomètre à Résonance
European patent
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EP
1 760 544 A1
Power reserve indicator
This power reserve indicator device includes two coaxial wheels (23, 25), two positive transmissions (21; 22, 24) between the coaxial
wheels (23, 25) and the barrel drum (1a), respectively the barrel-arbor (1d), a third wheel (26) coaxial placed between the above mentioned
coaxial wheels (23, 25) and in positive transmission with a power reserve indicator (33), these three coaxial wheels (23, 25, 26) pivoting
freely around their common rotation axis, the third wheel (26) containing equidistant openings, placed on a concentric circle to its piv-
oting axis and sized to receive balls freely (27) with a diameter exceeding the thickness of the third wheel (26) and a medium (28) to exert
two antagonistic strengths on the first two coaxial wheels (23, 25) to press them against the above mentioned balls (27) to convey to the
above mentioned third wheel (26) the algebraic sum of the displacements of the first two wheels (23, 25).
