Abstract: The apparatus includes measuring heads having contacts cooperating with points of the openings of the cage and a processing unit connected to the measuring heads. The processing unit provides signals indicating the positions of the central points of the openings, determines a reference geometric plane which is the plane nearest, on the average, to the central points and determines the distances of the central points from the reference geometric plane.

Abstract: The invention relates to a method and apparatus for checking the bell member of a constant velocity joint, wherein the joint member, positioned by reference devices, is checked by gauging devices cooperating with the ball races.Processing circuits provide signals representative of the positions of the centers of the ball races, in an equatorial plane, for determining the dimensions of the bell member with reference to the center of a circumference approximating the centers of the ball races.

Abstract: Apparatus for checking linear geometric dimensions of the raceway of a ball bearing ring. A base supports a rotatable plate, which makes a ring rotate about its geometrical axis, and a mobile arm which applies to gauging heads a reciprocating motion along the transversal direction of the raceway. The gauging heads have relevant feelers which, due to the motion of the gauging heads and the rotation of the ring, contact the raceway surface along lines having an oscillating form. The gauging heads provide signals responsive to the radial dimensions of the ring in correspondence with the raceway. The signals provided by the gauging heads are processed by electronic circuits for obtaining signals responsive to said geometric dimensions, for example signals indicating the raceway minimum diameter.

Abstract: An apparatus including two gauging heads, each having a feeler adapted to cooperate with a cylindrical surface of a part to be checked, and control devices for moving the feelers into contact with the cylindrical surface and for obtaining a scanning motion of the feelers as a relative displacement of the measurement axis passing through the feelers with respect to the geometrical axis of the cylindrical surface.The apparatus is particularly adapted for controlling small diameters, in a static as well as in a dynamic condition.

Abstract: Apparatus for measuring geometrical dimensions and/or errors on a mechanical part which includes a base, first and second supports, measuring devices, a first activating device coupled with the second support to control relative displacement between the two supports in order to cause feelers to cooperate with respective portions of the part, a locking device supported by the base to lock the part during measurement, a second activating device adapted to cause relative movement between the part and the measuring devices to permit feelers to explore respective portions of the part, a processing device to process signals supplied by transducers during the exploration of feelers on the part, thrust arms associated with the first support to support the part, first reference elements associated with the second support to cooperate mechanically with the part and push it towards the first support after the action of the first activating device overcomes the action of the thrust arms, second reference elements associa

Abstract: Apparatus for measuring errors in concentricity relative to first and second coaxial surfaces of rotation formed within a hole of a mechanical part which includes a first support for the part, a second support, a first mechanical reference element supported by the second support to cooperate with the first of the surfaces of rotation, a measurement device associated with the first mechanical reference element to cooperate with the second surface of rotation and effect dimensional measurements thereon, second mechanical reference elements supported by the second support and rigidly connected to the first mechanical reference element, a rigid member connected to the first mechanical reference element, a wire and a spring interconnecting the second support and the rigid member, a spring arranged between the first and second mechanical reference elements and the second support to permit simultaneously the first mechanical reference element to remain in contact with the first surface of rotation and the second mec

Abstract: A measuring device for checking mechanical pieces either while stationary or rotating which includes a first feeler substantially fixed with respect to a support and in alignment with a measuring head having a second feeler and supported by the support, a commutation unit containing a shaft and cams for changing the support and an electrical unit for detecting and visually recording the diameters and geometrical errors. In a first working condition the support of the measuring device can oscillate in order to allow both the first and second feeler to remain in contact with the piece to be gauged. The commutation unit allows for a change from the first working condition for measuring diameters of the work piece through the first and second feelers to a second working condition for measuring geometrical errors of a piece through the second feeler.

Abstract: An automatic measuring station for measuring the dimensions of workpieces comprising a conveyor for loading and unloading workpieces; a slide supporting, through parallel leaf springs having the ends clamped to the slide, positioning and reference elements adapted to contact the workpieces for displacing and positioning them into the measurement positions; stationary positioning and reference elements adapted to cooperate with the workpieces for positioning them, together with the positioning and reference elements supported by the slide and displaceable with respect to the slide; and measuring heads provided with measuring elements adapted to cooperate with the surface of the workpieces for measuring their maximum dimension in which the measuring heads are fixed to the positioning and reference elements supported by the slide through the leaf springs.

Abstract: A method and apparatus for the precision measurement of the longitudinal development of seats of mechanical workpieces such as side seals for Wankel engines whereby an inextensible element of known length slightly smaller than the theoretical length of the seat is inserted in the seat and displaced along it and the clearance, with respect to the length of the seat, is detected as a consequence of the displacements. The apparatus includes an element adapted to be inserted in the seat, a position transducer coupled to the element and movable arms adapted to displace the element along the seat from a first position in which one of its ends is in correspondence with an end of the seat to a second position in which the other end is in correspondence with the relevant end of the seat. The position transducer detects the amplitude of the displacement.

Abstract: An apparatus for measuring the length of curved segments including loading pairs of rollers with one roller of each pair being driven, positioning switches, positioning shaped reciprocally movable elements defining a hollow to house the segment to be measured and movable arms and feelers to measure the segment. The hollow has a shape corresponding to the theoretical shape of the segment. The movable elements are fitted with openings for at least one of the ends of the segment. The feelers are arranged in correspondence with the openings to cooperate with the relevant ends of the segment.

Abstract: A method and apparatus for the measurement of the distance between two points along a circular arc having an unknown radius in which there is a measuring signal generated responsive to the distance between the two points along a straight line passing through them and a measurement of the bending radius of the arc effected on the basis of the distance of a third point on the arc from a straight line joining a fourth and fifth point on the arc. The apparatus includes a support for the arc of the material being measured, a first measuring head for measuring the distance along a straight line between the ends of the arc, a second measuring head provided with at least three feelers with one of the feelers being mobile with regard to the other two, for detecting the arc bending and a processing and indicating unit connected with the first and second measuring heads to determine the longitudinal development.