126results about "Gear train" patented technology

Assembly element made in a plate of brittle material, such as silicon, in particular for a timepiece, including an aperture provided for the axial insertion of an arbour, the inner wall of the aperture including elastic structures which are etched into the plate and which each include at least one support surface for gripping the arbour radially in order to secure the assembly element relative to the arbour. Each elastic structure is formed by a fork which is connected to the inner wall of the aperture by a bridge of material and which includes two branches extending, on either side of the bridge of material, generally towards the arbour. Each branch includes a support surface in proximity to the free end thereof. The invention also proposes a timepiece fitted with an assembly element of this type.

A timepiece bearing has a bearing member of unitary construction that is provided at least at one end portion of a shaft member for undergoing rotation around an axis and that regulates movement of the shaft member in axial and radial directions of the shaft member. An elastic member applies an urging force in an axial direction of the bearing member to hold the bearing member in contact with the shaft member. A frame member supported by and fixed to a support member contains the bearing member. The elastic member is provided so as to establish connection between the bearing member and the frame member. The shaft member is configured to undergo rotation around the rotational axis while the shaft member and the bearing member are held in contact with each other by the elastic member.

Assembly element (18) made in a plate of brittle material, including an aperture (32) provided for the axial insertion of an arbour (26), the inner wall (33) of the aperture (32) including elastic structures (34), which are etched into the plate to grip the arbour (26) radially. Each elastic structure (34) includes a first rectilinear elastic strip (L1) which extends along a tangential direction relative to the arbour (26). According to the invention, each elastic structure (34) is formed by a radial stack of several parallel elastic strips.

The timepiece includes means for adjusting the shake of a rotating part or wheel set, in particular a balance one bearing of which is arranged in a bar ( 4 ). This bar comprises a base ( 18 ) associated with a adjusting screw ( 34 ) one end ( 36 ) of which rests on the bottom plate. Rotating this adjusting screw varies the distance between the base and the bottom plate ( 14 ). The centre of the adjusting screw is pierced for the passage of a tightening screw ( 32 ) for fixing the bar to the bottom plate. This adjusting screw is arranged in a hole ( 42 ) passing through the base ( 18 ) and can be rotated through the hole from the top face ( 46 ) of the bar in order to adjust the balance shake.

Timepiece wheel (10) comprising teeth (2) with play compensation each including a catch (3) projecting from a catch foot (31), and an elastic strip (4) projecting from a strip foot (41) opposite said catch (3) from which said strip (4) is separated by a ventral notch (5) and an intrados profile (43) of which, on the side opposite said catch (3), delimits a dorsal notch (6), said strip foot (41) being delimited, towards the pivot axis (D) of said wheel (10), by an inner end (51) of said ventral notch (5) and by an inner end (61) of said dorsal notch (6).Said inner end (61) is located closer to said axis (D) than said inner end (51) and extends, on the side of said axis (D) underneath said catch foot (31) or underneath the inner extension (52) of said ventral notch (5) towards said pivot axis (D).

To provide a timepiece bearing, a movement, and a portable timepiece helping to achieve an improvement in terms of time indication accuracy. A timepiece bearing 180 includes: a bearing member 181 provided at at least one end portion 145 of a shaft member 143 rotating around an axis C and regulating movement of the shaft member in axial and radial directions; an elastic member 182 having an force facing in axial direction to the bearing member; and a frame member 166 containing the bearing member, wherein the elastic member is provided so as to establish connection between the bearing member and the frame member; the frame member is supported by and fixed to a support member 167; and the shaft member is rotatable around the axis, with the shaft member and the bearing member being held in contact with each other by the elastic member.

Provided is a movement wherein, when an excessive torque is generated, transmission of the torque to a speed regulator is suppressed, and when excessive torque is not generated, the wasteful consumption of energy is prevented. A movement (100) is provided with the following: a mainspring (1) (one example of a motive power source) for generating torque; a balance wheel (23) (one example of a speed regulator); a gear train mechanism (10) for transmitting the torque generated by the mainspring (1) to the balance wheel (23); and a spring-equipped base (30) (one example of a mechanism for movement) that, when the torque generated by the mainspring (1) is greater than a torque (Tmax) set beforehand, causes a wheel, such as a second wheel (12), of the gear train mechanism (10) to move in a direction in which torque transmission efficiency between gears of the gear train mechanism (10) decreases.

The invention relates to a timepiece wheel (1) with play take-up, including a toothing (2), each tooth (3) of which includes first and second half-teeth (4, 5) each including a part (40, 50) of the tooth profile, and movable with respect to each other against elastic return means (6), the wheel (1) including, axially stacked, a first and a second half-wheel (400, 500) respectively carrying the first and second half-teeth (4, 5) and having limited rotational mobility with respect to each other, about the axis of this toothing (2), and against the elastic return means, the toothing of each half-wheel (400, 500) overhanging the other half-wheel, each half-wheel including hollows (41, 51) inside each of which is movable an opposite half-tooth, between two successive half-teeth (4, 5).