Coaxial release anchor (1) has first (12) and second (13) rest blades. Each blade is made from a single stone and engages in groove (14) machined in the anchor. Each blade stone rises above the level of the release anchor (1) so that it meshes in the te (8) of a second release wheel (3). The anchor itself is in the same plane as first release wheel (1).

Coaxial lever escapement

The escapement has an escape wheel set (60) fitted with escape wheels (1, 2) that are secured to each other, and a balance roller (3) carrying an impulse pin (4). A pallet assembly (5) cooperates with the impulse pin and is fitted with locking pallet stones (6, 7) and an impulse pallet stone (8). The impulse and locking pallet stones cooperate with teeth of the escape wheels. The pallet assembly drives an auxiliary wheel set (9) carrying another impulse pallet stone (10) that cooperates with the teeth of the escape wheel.

Lever escapement for a timepiece

The mobile element includes a central rigid zone (2) provided with arms (6) extending radially from the central zone (2) towards a peripheral zone including teeth (8). The arms (6) are flexible to allow a small tangential and/or radial movement of the teeth (8) in order to absorb shocks. The invention is characterized in that the arms (6) are curved and bend gradually towards an orientation tangential to the rotation of the mobile element, in that the thickness of the arms gradually decreases, and finally, in that the ends of the arms form the teeth.

Mobile micromechanical element with shock controlled rotation

The escapement has a latch (1) with a rod (3) and a ring (7) acting as two arms, respectively. The ring surrounds an escapement moving body (8), and has lock pallets (9, 11) and impulse pallets (10, 12) cooperated with teeth (13-16) of the moving body to alternately block the moving body and impart a plate (6). The moving body has a set of interdependent and coaxial large and small escapement wheels (17, 18), where one wheel (17) has a diameter larger than another wheel (18). Each of the wheels cooperates with the impulse pallets. The lock pallets are cooperated with any of the wheels.

Exhaust with tangential impulses

The present invention refers to a constant-force device suitable for being integrated into a movement of watches, particularly wrist watches, with an indirect-second mechanism having an intermediate second pinion (14) driven by a second wheel (9) of the movement, and an indirect-second wheel (15). The constant-force device comprises a tensioning module (4, 5, 6, 7, 8), a cam (2), a lever (11), and a stop wheel (13). The stop wheel (13) of the constant-force device is mounted on the intermediate second pinion (14) of the indirect-second mechanism.

Constant-force device for indirect-second watches

The invention relates to a detached escapement which preferably does not require oil to be applied to the escape wheel. The escapement has an escape wheel (10;30), a balance wheel and a pivoted lever (14;37) arranged so that during each movement of the balance wheel in one direction of rotation an impulse is applied direct to an element (25;33) attached to the balance wheel. During each movement of the balance wheel in the other direction of rotation it is preferred that an impulse is applied to the balance wheel via the pivoted lever. The escapement may be used in a watch, clock or chronometer.

George Daniels

Papers

Watches, clocks and chronometers and escapements therefor