초록 ▼

A measuring apparatus (1) is provided which has two arms (8) connected to a protection casing (6) through fulcrums (9). Associated with the arms (8), externally of the casing (6), are feeler pins (10) adapted to come into contact with the workpieces (3) and, internally of the casing (6), sensors (11

A measuring apparatus (1) is provided which has two arms (8) connected to a protection casing (6) through fulcrums (9). Associated with the arms (8), externally of the casing (6), are feeler pins (10) adapted to come into contact with the workpieces (3) and, internally of the casing (6), sensors (11) for measuring the oscillations of the arms (8). Also provided are driving members adapted to exert at least one contact force and one release force tending to rotate the arms (8) in opposite directions and comprising at least one magnet (13) adjacent to the arms (8), magnetic locators (14) integral with the arms (8) and having active faces (14a) turned towards the magnet (13), and drive elements (15) adapted to selectively vary the magnet (13) polarities turned towards the magnetic locators (14).

대표청구항 ▼

[ What is claimed is:] [1.]1. workpiece-measuring apparatus, in particular for grinding machines, comprising:two arms (8) oscillatingly supported by fulcrums (9) and having respective work portions (8b),feelers (10) on said work portions (8b) for contacting a workpiece (3),sensors (11) for measuring

[ What is claimed is:] [1.]1. workpiece-measuring apparatus, in particular for grinding machines, comprising:two arms (8) oscillatingly supported by fulcrums (9) and having respective work portions (8b),feelers (10) on said work portions (8b) for contacting a workpiece (3),sensors (11) for measuring oscillations of said arms (8) about said fulcrums (9),drive means for selectively exerting at least one contact force and at least one release force capable of rotating said work portions (8b) of said arms (8) respectively towards and away from said workpiece (3),wherein said drive means comprise:magnetic elements (14) carried by each of said arms (8), said magnetic elements (14) having active faces (14a) having opposite polarities,at least one magnet (13) having opposite polarities and located to cooperate with said active faces (14a) of said magnetic elements (14) to create magnetic forces between said at least one magnet (13) and said magnetic elements (14),means (15) for selectively reversing said polarities of said at least one magnet (13) relative to said polarities of said active faces (14a) of said magnetic elements (14) to thereby reverse the direction of said magnetic forces for selectively providing said at least one contact force and said at least one release force.