# US 2014/0160897 A1 · Mechanism for driving an indicator for a timepiece > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0160897 A1 - Document ID: US20140160897A1 - Status: Published application - Kind: A1 - Application number: 14/131,525 - Filed: 2012-06-13 - Published: 2014-06-12 - Earliest claimed: 2011-08-30 - Assignees: Breitling SA - Inventors: Jacques Gabathuler; Trung Thanh Nguyen; Serge Nicollin; Florent Zufferey - Web page: https://patentgrep.com/patent/US20140160897A1 ## CPC - G04B 19/25333: {wherein the date indicators are driven or released mechanically by a clockwork movement} - G04B 19/02: Back-gearing arrangements between gear train and hands {(transmissions in general G04B13/00)} - G04B 19/25373: {driven or released stepwise by an energy source which is released at determined moments by the clockwork movement} - G04B 27/026: {for several clockworks or pairs of hands and/or supplementary functions} - G04B: MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at pre-selected times or after predetermined time intervals G04C23/00; clocks or watches with stop devices G04F7/08) ## Abstract A mechanism for driving an indicator for a timepiece includes: a mobile for driving the indicator; a first lever mounted about a first pivot and including a beak to cooperate with a toothing of the mobile; a first cam arranged to rotate the first lever about the first pivot; a second lever mounted about a second pivot and to which the first pivot is rigidly connected; a second cam arranged to rotate the second lever about the second pivot; and elastic elements for maintaining the cooperation between the levers and cams; the levers and the cams being arranged so that the beak of the first lever cyclically describes a closed curve, each cycle including a first motion during which the beak leaves the toothing of the mobile without changing the angular position thereof and a second motion during which the beak re-enters the toothing to move the mobile. ## Claims ### Claim 1 Mechanism for driving an indicator for a timepiece, comprising: a mobile (22; 23) for driving the indicator, a first lever (16) mounted about a first pivot (17) and comprising a beak (20; 21) intended to cooperate with a toothing of the mobile (22; 23) to move said mobile, a first cam (2) arranged to rotate the first lever (16) about the first pivot (17), a second lever (11) mounted about a second pivot (12) and to which the first pivot (17) is rigidly connected, a second cam (3) arranged to rotate the second lever (11) about the second pivot (12), and elastic means (10, 13) for maintaining the cooperation between the levers (16, 11) and the cams (2, 3), the levers (16, 11) and the cams (2, 3) being arranged so that the beak (20; 21) of the first lever (16) cyclically describes a closed curve, each cycle comprising a first motion during which the beak (20; 21) leaves the toothing of the mobile (22; 23) without changing the angular position of said mobile and a second motion during which the beak (20; 21) re-enters the toothing of the mobile (22; 23) to move said mobile. ### Claim 2 (depends on 1) Mechanism according to claim 1, wherein the beak (20, 21) is non-retractable. ### Claim 3 (depends on 1) Mechanism according to claim 1, wherein the levers (16, 11) and the cams (2, 3) are arranged so that the mobile (22; 23) moves by instantaneous jumps. ### Claim 4 (depends on 1) Mechanism according to claim 1, wherein the first and second cams (2, 3) are coaxial. ### Claim 5 (depends on 1) Mechanism according to claim 1, further comprising a third lever (8) mounted about a third pivot (9) and arranged so that the first lever (16) is driven by the first cam (2) via this third lever (8). ### Claim 6 (depends on 1) Mechanism according to claim 1, further comprising a device (28-36; 39-42) to cause the beak (20; 21) to automatically leave the toothing of the mobile (22; 23) before a correction of the position of said mobile. ### Claim 7 (depends on 6) Mechanism according to claim 6, wherein said device (28-36) can be actuated by a displacement of a winding stem (27) into a predetermined axial position. ### Claim 8 (depends on 6) Mechanism according to claim 6, wherein said device (28-36; 39-42) comprises means (35, 36; 42) for moving the second lever (11) away from the second cam (3), this motion causing a displacement of the first lever (16) causing the beak (20; 21) to leave the toothing of the mobile (22; 23). ### Claim 9 (depends on 1) Calendar mechanism for a timepiece comprising a mechanism according to claim 1. ### Claim 10 (depends on 1) Timepiece comprising a mechanism according to claim 1. ### Claim 11 (depends on 2) Mechanism according to claim 2, wherein the levers (16, 11) and the cams (2, 3) are arranged so that the mobile (22; 23) moves by instantaneous jumps. ### Claim 12 (depends on 2) Mechanism according to claim 2, wherein the first and second cams (2, 3) are coaxial. ### Claim 13 (depends on 2) Mechanism according to claim 2, further comprising a third lever (8) mounted about a third pivot (9) and arranged so that the first lever (16) is driven by the first cam (2) via this third lever (8). ### Claim 14 (depends on 2) Mechanism according to claim 2, further comprising a device (28-36; 39-42) to cause the beak (20; 21) to automatically leave the toothing of the mobile (22; 23) before a correction of the position of said mobile. ### Claim 15 (depends on 7) Mechanism according to claim 7, wherein said device (28-36; 39-42) comprises means (35, 36; 42) for moving the second lever (11) away from the second cam (3), this motion causing a displacement of the first lever (16) causing the beak (20; 21) to leave the toothing of the mobile (22; 23).