Abstract: A plug gauge (1) includes a support and protection system that defines a longitudinal axis with a handle (2) closed by a cap (13) that includes electronic devices for the wireless transmission of electrical signals representative of a dimension to be checked, and a probe (6) including a measuring armset coupled with a transducer for generating electrical signals. The probe is connected to the cap of the handle by means of an interface element (8) that includes mechanical references to prevent rotations of the probe with respect to the handle about the longitudinal axis.

Abstract: A plug gauge (1) includes a support and protection system that defines a longitudinal axis with a handle (2) closed by a cap (13) that includes electronic devices for the wireless transmission of electrical signals representative of a dimension to be checked, and a probe (6) including a measuring armset coupled with a transducer for generating electrical signals. The probe is connected to the cap of the handle by means of an interface element (8) that includes mechanical references to prevent rotations of the probe with respect to the handle about the longitudinal axis.

Abstract: A checking apparatus, for example a plug gauge, for checking diameters and/or geometrical features of mechanical parts includes a support structure (1) and checking means (20,21) coupled to the support structure, with mutually movable feelers (36) for contacting the surface of the part and transducer means for providing electrical signals. The support structure includes at least two studs (11,12) that achieve a guide along a longitudinal axis, and the checking means are coupled to the studs in a removable and adjustable way along such longitudinal axis. Several checking means can be coupled to the studs. A particular embodiment foresees three flanked studs and checking means coupled to pairs of adjacent studs. An adapting system allows the feelers to self-center on the part to be checked, for example the surface of a hole.

Abstract: A checking apparatus, for example a plug gauge, for checking diameters and/or geometrical features of mechanical parts includes a support structure (1) and checking means (20,21) coupled to the support structure, with mutually movable feelers (36) for contacting the surface of the part and transducer means for providing electrical signals. The support structure includes at least two studs (11,12) that achieve a guide along a longitudinal axis, and the checking means are coupled to the studs in a removable and adjustable way along such longitudinal axis. Several checking means can be coupled to the studs. A particular embodiment foresees three flanked studs and checking means coupled to pairs of adjacent studs. An adapting system allows the feelers to self-center on the part to be checked, for example the surface of a hole.

Abstract: A linear gauging head, for example a “cartridge” head, includes a casing (1), a spindle (11), movable with respect to the casing along a longitudinal axis, a feeler (13′) coupled to a first end of the spindle, and a differential position transducer with windings (15, 16, 17), stationary with respect to the casing, and a core (18) coupled to a second end of the spindle. The spindle includes longitudinal grooves (12) and is guided by means of an axial bearing (22) with rolling elements (23) that cooperate with the grooves for allowing the spindle to translate with respect to the casing along the longitudinal axis, and concurrently prevent it from rotating about said axis.

Abstract: Gauging head and apparatus for linear dimension checking of mechanical pieces comprising an integral element that defines an arm carrying a feeler, a reference portion, and a fulcrum that enables rotations of the arm with respect to the reference portion, and a differential transformer position transducer with a cylindrical shaped casing, carrying windings, fixed to the reference portion, and a ferromagnetic core movable together with the arm. The integral element is locked in an adjustable way to a support by means of the cylindrical casing. The integral fulcrum is achieved by work hardening the material and subsequently grinding it.

Abstract: Gauging head and apparatus for linear dimension checking of mechanical pieces comprising an integral element that defines an arm carrying a feeler, a reference portion, and a fulcrum that enables rotations of the arm with respect to the reference portion, and a differential transformer position transducer with a cylindrical shaped casing, carrying windings, fixed to the reference portion, and a ferromagnetic core movable together with the arm. The integral element is locked in an adjustable way to a support by means of the cylindrical casing. The integral fulcrum is achieved by work hardening the material and subsequently grinding it.

Abstract: Gauging head and apparatus for the linear dimension checking of mechanical pieces comprising an integral element (1) that defined an arm (5) carrying a feeler (25), a reference portion (3), and a fulcrum (13) that enables rotations of arm (5) with respect to the reference portion (3), and a differential transformer position transducer with a cylindrical shaped casing (35; 82), carrying the windings (34; 83), fixed to the reference portion (3), and a ferromagnetic core (32; 84) movable together with the arm (5). The integral element (1) is locked in an adjustable way to a support (67), by means of the cylindrical casing (35; 82). The integral fulcrum is achieved by work hardening the material and subsequently grinding it.

Abstract: A linear gauging head, or cartridge head, comprises a casing, a spindle movable with respect to the casing along a longitudinal axis, a feeler coupled to a first end of the spindle and a differential position transducer with windings, fixed with respect to casing, and a core coupled to a second end of spindle. The spindle is guided by recirculating ball bushings with rolling elements that cooperate with the spindle and thus allow its displacement with respect to the casing.

Abstract: A linear gauging head, or cartridge head, comprises a casing (1), a spindle (10) movable with respect to the casing along a longitudinal axis, a feeler (12) coupled to a first end of the spindle and a differential position transducer with windings (13, 14, 15), fixed with respect to casing (1), and a core (16) coupled to a second end of spindle (10). The spindle is guided by recirculating ball bushings (18, 19) with rolling elements (29) that cooperate with the spindle and thus allow its displacement with respect to the casing.

Abstract: An apparatus is disclosed for checking the geometric characteristics of mechanical objects having rotational symmetry, such as shafts or bushings. A longitudinal support element defines a longitudinal axis and first reference surfaces, at least one modular coupling element is removably coupled to, and is adjustable longitudinally along, the longitudinal support element and provides second reference surfaces which cooperate with the first reference surfaces to align a linear guide portion transversely of the longitudinal axis. A fastener secures the modular coupling element, which removably supports a gauging device, to the longitudinal support element and a locking/unlocking device cooperates with the gauging device and guide portion for locking the gauging device to the modular coupling element.

Abstract: An apparatus is disclosed for checking the geometric characteristics of mechanical objects having rotational symmetry, such as shafts or bushings. A longitudinal support element defines a longitudinal axis and first reference surfaces, at least one modular coupling element is removably coupled to, and is adjustable longitudinally along, the longitudinal support element and provides second reference surfaces which cooperate with the first reference surfaces to align a linear guide portion transversely of the longitudinal axis. A fastener secures the modular coupling element, which removably supports a gauging device, to the longitudinal support element and a locking/unlocking device cooperates with the gauging device and guide portion for locking the gauging device to the modular coupling element.

Abstract: The geometrical features of a part (6) having center seats are electronically checked by processing signals of gauging heads (14-17) that relate to linear dimensions of the part together with signals of other gauging heads (30, 31) adapted to define a reference geometrical axis. In order to obtain checkings of high accuracy, the reference geometrical axis is defined by means of two gauging heads (30, 31), each of which has a feeler (67, 72) movable along the three directions that is adapted to cooperate with a respective center seat.

Abstract: An apparatus for checking features of workpieces with rotational symmetry defining a geometrical axis, which includes a base, rest devices fixed to the base for supporting the workpiece with the geometrical axis horizontally arranged, and a support structure coupled to the base for rotation about a horizontal axis. A counterweight and sensor are coupled to the support structure and movable with the support structure from a rest position, allowing loading of the workpiece to be checked onto the rest devices to a working position where the sensor is brought into cooperation with the workpiece. The axis of rotation of the support structure is arranged below the axis of the workpiece, in correspondence to a vertical geometrical plane passing through the workpiece geometric axis when the workpiece is positioned on the rest devices.

Abstract: An apparatus for checking linear dimensions and other features of workpieces (42) comprises a support structure (2) carrying reference and support devices (40) adapted for supporting the workpiece to be checked (42). A linear support frame (210) carrying measuring heads (230) is connected to the support structure (2) through a coupling device (88) directly coupled to the support frame (210), substantially in a single limited zone for preventing deformations of the support frame (210).

Abstract: Gauge for checking linear dimensions of mechanical pieces comprising a support, two arms movable with respect to the support, two feelers respectively fixed to the arms for contacting the piece to be checked and a position transducer having two mutually movable elements respectively fixed to the movable arms. At least one of the two elements of the transducer is fixed to the relevant movable arm by screw, nut-screw coupling and between the screw and the nut-screw there is arranged a thread insert, having at least one polygonal coil, which permits adjustment of the mutual position of the elements of the transducer, while assuring a stable adjustment.

Abstract: Probe for use in apparatus for checking linear dimensions of mechanical pieces including a support, an arm-set carried by the support and having a movable arm carying a feeler for contacting the piece to be checked, and a protective diaphragm coupled to the support and the movable arm; the protective diaphragm includes a cloth core and a rubber coating.

Abstract: An apparatus for checking diametral dimensions comprises a resilient protection element, with a substantially tubular shape, for protecting an internal arm-set by preventing any foreign matter, like chips, from entering inside. In order to obtain a protection element that occupies little space and is particularly resistant to wear, blows, chemical etching etc., the element, substantially cylindrical, is made of a lamina of metal--preferably steel for springs, or nickel, or chromium--, or other materials with similar characteristics. Two feelers are placed at diametrically opposite points of the cylindrical element and as a consequence of the lamina flexions move in a diametral direction. The displacement of the feelers is transmitted to a position transducer. The invention mainly applies to plug gauges used in transfer lines for checking small diameter holes.

Abstract: Gauge for checking linear dimensions of mechanical pieces comprising a support, two arms movable with respect to the support, two feelers respectively fixed to the arms for contacting the piece to be checked and a position transducer having two mutually movable elements respectively fixed to the movable arms. Each feeler is fixed to the relevant movable arm by screw, nut-screw coupling and between the screw and the nut-screw there is arranged a thread insert, having at least one polygonal coil, which permits adjustment of the position of the feeler, while assuring a stable adjustment.

Abstract: A cartridge gauging head for checking linear dimensions of parts comprises a tubular casing, a shaft axially movable with respect to the casing, a feeler fixed at an end of the shaft for contacting the part to be checked, a transducer for providing a signal depending on the mutual positions of the shaft and the casing, and a guide member for guiding the axial displacements of the shaft. The guide member includes an intermediate portion coupled to the casing and two end portions adapted to cooperate with the shaft for guiding it.