Abstract:
An optical measuring element measures forces in at least one direction. The measuring element has a single-piece structure. There is an outside wall with notches introduced therein. Each notch defines parallel edges, and the notches define more or less elastically flexible zones in the structure and constitute the only connection between a first region and a second region of the structure. For optical distance measurements between the two regions of the structure, one or more optical fibers are each attached with one end thereof to a region of the structure such that reflective surfaces are located close to the ends. The reflective surfaces are firmly connected to another region. The optical fibers are disposed on the outside wall.
Abstract:
A device for converting a first movement into a second movement responsive to the first movement under a demagnification scale includes: a) an input portion being drivable in a rectilinear translation in a first direction by an actuator causing the first movement; b) an output portion being movable by a converting blade causing the second movement responsive to the first movement in a second direction substantially perpendicular to the first direction; and c) a converting section connecting the input portion to the output portion. The converting section includes an intermediate spring portion and the converting blade. The intermediate spring portion has at least two parallel flexure blades; and the converting blade is substantially identical in shape to the a least two parallel flexure blades and is offset from its neutral position by a predetermined amount in the first direction as compared to the neutral position of the at least two parallel flexure blades. The device has a flexure-based structure that allows combining the advantages of classical actuators with accuracies in the micrometer range and the advantages of flexures to achieve nanometer accuracy.
Abstract:
A mechanical oscillator isochronism corrector comprising a frame (12), a flexible blade (14) integral with the frame to act on a mechanical oscillator at a contact portion (14a) presented by the blade, and a first element for adjusting the pre-stress of the flexible blade including a pre-stress finger (22) acting on the flexible blade, the first adjustment element being integral with the frame.
Abstract:
The present invention relates to a A device for puncturing an object, in particular a bodily vein, comprising: a body defining an inner cavity with at least one opening and a perforating needle extending in the cavity and being movable in the cavity between a resting position and an active position where the needle extends at least partially through the opening outside the cavity, and actuating means arranged to move the needle between the resting and active positions. The actuating means comprises a tuneable multistable driving mechanism comprising at least a multistable element having a determined switching load, the multistable element being fixedly arranged between the needle and an inner wall of the cavity, and an actuator for transmitting energy to move the needle between the resting and active positions when the energy reaches the switching load.
Abstract:
An optical force sensing element for microsurgical instruments and methods measures force F in three orthogonal directions and includes a monolithic cylinder structure, a cylindrical surface and a top surface that absorbs and transmits the force F. Three punch-like notches, all being parallel to the y-direction, are spaced apart along the z-axis and form two blades between the first and second notch and between the second and the third notch. Three channels parallel to the z-axis extend from the bottom surface to the top surface and cross the first notch while bypassing the other two notches. Three optical fibers, each fixed in one of the three channels, all entering the structure from the bottom surface, cross the first notch and end at or near the top surface while being interrupted in the first notch and forming two surfaces of each fiber that define a Fabry-Perot interferometric cavity.
Abstract:
The invention relates to an immobilizing device for a toothed wheel suitable for the field of horology where it can be part of a direct- or indirect-impulse escapement, in particular in a wristwatch. This immobilizing device (1, 2, 3, 4, 5, 6) comprises: —a base (7); —an immobilizer (9) comprising two arms (10, 11) each provided with a pallet (14, 15) intended to come into contact with a tooth of the toothed wheel (40); —a first and a second elastic element (12, 13) each having an end connected to the immobilizer (9) and another end connected to the base (7); —a third elastic element (16) connected to the immobilizer (9), and it has the particular feature that it is in one piece or in one piece apart from at least one of the pallets (14, 15). The invention also relates to a timepiece and to a method for assembling such a timepiece.
Abstract:
The invention concerns a movement transmission unit and a movement transmission apparatus employing the same. The movement transmission transmits at least two movement components, each possessing one degree of freedom of movement, from an input-side (6) to an output-side (82, 84), which movement then has at least two coupled degrees of freedom of movement, or vice versa. The invention also concerns one transmission unit (2) per input-side (6) degree of freedom of movement, i.e multiple transmission units (2), which are functionally bound together in parallel by means of their respective output sections (8). Each transmission unit (2) possesses an immobile, solidly fixed first section (4). Its input facility is a second section (6), which is bend linked to the fixed first section (4) by means of a unified linkage structure encompassing parts (22, 26, 34; 28, 36) and forming what becomes known as a first “parallelogram linkage”. This is movably linked in the direction of the corresponding degrees of freedom of movement of the transmission unit (2). The second section (6) is so designed, that by means of a second linkage structure, (46, 50, 58, 48, 52, 60), i.e. another “parallelogram linkage”, second section 6 allows output-side, free movement along the degree of freedom of movement of the other transmission units (2). For the increase of the movement precision of such a movement transmission apparatus, the first (22, 26, 34; 24, 28, 36) and/or the second (46, 50, 58; 48, 52, 60) linkage structures are designed as bend linkages. Further, the second section (6), the second linkage, (50; 52; 58; 60) and the output-side (8) are so designed, that the associated transmission unit (2) forms a rigid structure.
Abstract:
The present invention relates to a A device for puncturing an object, in particular a bodily vein, comprising: a body defining an inner cavity with at least one opening and a perforating needle extending in the cavity and being movable in the cavity between a resting position and an active position where the needle extends at least partially through the opening outside the cavity, and actuating means arranged to move the needle between the resting and active positions. The actuating means comprises a tuneable multistable driving mechanism comprising at least a multistable element having a determined switching load, the multistable element being fixedly arranged between the needle and an inner wall of the cavity, and an actuator for transmitting energy to move the needle between the resting and active positions when the energy reaches the switching load.
Abstract:
A method for fabricating a micromechanical part from a substrate in which the part is fabricated by providing a plurality of fasteners between the part and the substrate, the fasteners being sacrificial, characterized in that the fasteners include at least one hinge at the end of each fastener located beside the part, and in that the method includes a step of breaking the sacrificial fasteners. The micromechanical parts employing this type of sacrificial fastener are also described.
Abstract:
A method for fabricating a micromechanical part from a substrate in which the part is fabricated by providing a plurality of fasteners between the part and the substrate, the fasteners being sacrificial, characterized in that the fasteners include at least one hinge at the end of each fastener located beside the part, and in that the method includes a step of breaking the sacrificial fasteners. The micromechanical parts employing this type of sacrificial fastener are also described.