Abstract: A probe for checking linear dimensions of mechanical parts comprises a support, a movable arm carrying a feeler adapted for contacting the part to be checked and an integral member coupled to the movable arm and the support. The member includes a first portion fixed to the movable arm a second portion fixed to the support and an intermediate portion having two sections with reduced thickness which define two axes of mutual rotation of the first and second portion. An electrical circuit closed under rest conditions comprises two pairs of electrical contacts which are opened in consequence of displacements of the movable arm along opposite directions or of an axial displacement of the arm.

Abstract: A ring gauge for checking external diametral dimensions comprising an arm-set essentially consisting of an integral member including two arc-shaped arms, two resiliently deformable portions adapted to define fulcrums for the rotation of the arms and an intermediate portion coupled to a support. Two feelers are adjustably fixed to the arms, approximately at intermediate points of their longitudinal development. The elements of a transducer are fixed at the free ends of the arms.

Abstract: A probe for checking linear dimensions of mechanical pieces comprises a support casing, an arm movable with respect to the casing and having a first element, a second element and an intermediate third element, a feeler fixed to the first element of the movable arm for contacting the piece to be checked, and detecting means for providing a signal depending on the position of the movable arm. The intermediate element is removably coupled to the first element and the second element and defines a section adapted to break as a consequence of blows against the feeler and the first element of the movable arm occurring along any direction.

Abstract: A gauge for measuring the clearance between a cam of an engine camshaft and the relevant valve, during rotation of the camshaft, comprises a first movable feeler element, for contacting the cam profile, and a second movable feeler element, for contacting a surface, facing the cam, of the valve or of an element coupled to the valve. A retraction device can displace the second feeler element from a rest position to an operating position. Gauging heads provide a signal depending on the mutual position of the first and second feeler elements and a processing circuit processes these signals to obtain the clearance.

Abstract: An apparatus for checking features, particularly linear dimensions, of mechanical pieces being transported by a conveyor, comprising a slide supporting a gauging device adapted to check the subsequent pieces and cam devices for actuating the slide and the gauging device. The actuating devices are coupled to the slide in such a way that the slide performs a reciprocating motion including a forward stroke, during which a piece is checked, and a return stroke for rendering possible the checking of the subsequent piece. The checking of each piece is carried out during a portion of the forward stroke of the slide, while the slide moves in synchronism with the conveyor.

Abstract: A gauging head, for checking linear dimensions of workpieces, comprises a casing; two movable arms, pivotable about pins fixed to the casing, and carrying feelers for contacting the workpiece to be checked; two position transducers operatively coupled to the movable arms; a second pair of arms pivotable about the pins; and zero-setting devices. The zero-setting devices include two members coupled to a shaft rotatable by a control lever. In a first position of the control lever the members are locked and the gauging head is in gauging condition. In a second position of the control lever the members are unlocked and can translate along the shaft permitting to carry out the zero-setting operation of the head because the two movable arms and the second pair of arms engage the members in such a way that the arms can rotate about the pins while maintaining a determined setting of the transducers.

Abstract: A suspension system for an electric gauge of the modular type includes one or more, substantially vertical, modules and a supporting device for supporting the modules comprising a base plate, a stanchion fixed to the base plate, and horizontal cylindrical rods threadedly coupled with the stanchion. The casings of the modules have resilient hooks which are coupled by interference fit with the cylindrical rods for hooking the modules to the supporting device.

Abstract: Plug gauge for checking the diameter of a bore, including two movable arms with relevant feelers and a protective body defining two holes for the passage of the feelers. A sealing gasket seals the space between the holes of the protective body and the feelers, preventing the entry of foreign matter, such as chips and coolants, into the protective body.

Abstract: A plug comparator for checking the diameter of holes of mechanical parts comprising a support, a movable measurement unit and a protection casing.The movable measurement unit comprises two movable arms bearing respective feeler elements which come into contact with the part to be checked.A position transducer detects the position of the movable arms and is connected by an electric cord to an electric supply and indication group.The casing has a lower base with a frustoconical seat for the fitted housing of a closure plate. The closure plate has a cut in diametral direction which subdivides it into two adjacent portions connected by a third portion which is elastically yieldable so as to permit fitting the closure plate in the frustoconical seat.

Abstract: A probe for checking linear dimensions comprising an arm movable along two opposite directions with respect to a support, a pair of electrical contacts fixed with respect to the support and a pair of flexible laminae having first ends connected to the movable arm and carrying at second ends a pair of movable electrical contacts, which--in rest conditions--are closed against a relevant one of the fixed contacts. An element fixed to the movable arm is adapted to cooperate with two surfaces coupled to the laminae next to the movable contacts, for causing, upon displacements of the movable arm from a rest position, release of either of the movable contacts from the corresponding fixed contact.

Abstract: Gauge for the dimensional checking of a piece being machined, comprising a movable gauging arm fixed to an outer casing, through a pin and a bushing. A spring coupled to the arm and to the outer casing acts on the pin and the bushing for univocally defining an axis, stationary with respect to the casing, for the rotation of the gauging arm.

Abstract: A manual plug comparator for checking the diameter of holes of mechanical parts, comprising a support, a movable measurement unit and a protective casing. The movable measurement unit comprises two movable arms respectively bearing feeler elements which come into contact with the parts to be checked. A position transducer detects the position of the movable arms and is connected by an electric cord to an electric supply, detection and indication group. A base plate fastened to the casing has an opening adapted to permit the introduction of air under pressure into the plug. The flow of air passes through the inside of the plug, removing any foreign matter and emerges through other openings provided in the support.

Abstract: A gauge for the dimensional checking of mechanical pieces comprises an outer casing, an armset fixed to the casing and having a gauging arm movable along two opposite directions, a feeler carried by the gauging arm for contacting the piece to be checked, a limiting device for adjustably limiting the displacements of the gauging arm along the directions, a spring cooperating with the gauging arm for urging the feeler against the piece, and a device for adjusting the force applied by the spring. The limiting device includes a member, fixed to the casing, which defines a first abutment surface for limiting the displacements of the gauging arm along one of the directions, and a screw passing through the hole of the gauging arm. The screw is coupled to the member and defines a second abutment surface, adjustable with respect to the first abutment surface.

Abstract: An automatic gauge for checking diameters of holes of a mechanical piece comprising plug gauges having protection nosepieces adapted to enter into the holes, a slide carrying the plug gauges, and a hydraulic device for displacing the slide; the contact between the nosepiece of a plug gauge and the piece, caused by errors in the machining or in the positioning of the piece, making a circuit which controls stopping of the slide for preventing the plug gauges from being damaged.

Abstract: A gauging head for checking linear dimensions of mechanical pieces comprising a single member including a movable arm, a support for the movable arm, and a fulcrum for pivoting movements of the arm with respect to the support. The member also defines seats for an inductive transducer coupled to the arm and the support, the transducer being sealed by a resilient gasket.

Abstract: A gauge for checking linear dimensions of mechanical parts comprises a support, a movable gauging arm, a transducer coupled to the movable arm and the support, and a helical spring defining a longitudinal geometrical axis and having a first end in abutment with the movable arm and the second end in aubtment with a movable element of an adjustment device for adjusting the force applied by the spring to the gauging arm, the device comprising a screw coaxial to the spring and arranged within the spring coils, and a stanchion which controls a translation movement of the movable element along an axis substantially coinciding with the spring axis, translation movement of the movable element changing the axial length of the spring and, consequently, the force it applies to the gauging arm.

Abstract: The apparatus includes a frame, a plate coupled to a shaft for making the piece to be checked rotate with respect to the frame and a reference plate resting on the piece for defining a mechanical reference for the checking of the piece. A supporting device couples the reference plate to the frame and permits rotation of the reference plate together with the piece. Measuring heads, fixed to the frame, include feeler elements which contact - without any sliding motion - the supporting device, for indirectly detecting the position of the mechanical reference during the piece rotation.

Abstract: A gauge for checking linear dimensions of mechanical pieces, comprising a differential transformer transducer including a first member, substantially cylindrical, which supports a core, a second member, substantially cylindrical, which houses electric windings, and a sealing bellows having its ends fixed to the first and the second member, respectively.The two members are mutually movable and the electric windings provide a measurement signal representative of the position of the core with respect to the second member.The ends of the bellows are coupled to annular seats defined in the first and the second members, with a coupling which generates substantially compressive stresses at said ends.

Abstract: A plug comparator for checking the diameter of holes in mechanical parts, having a movable measurement unit comprising two movable arms bearing respective feeler elements which come into contact with the part to be checked. A position transducer detects the position of the movable arms and is connected by an electrical cord to an electrical supply and indication group. The movable unit comprises a single member of stamped plate having two portions which constitute the arms. The two portions have two sets for the ends of a spring which act on the arms, two seats for two mutually movable elements of the transducer, seats for the feeler elements and for devices for locking the feeler elements, and stop elements which limit the movements of the arms towards each other.

Abstract: A manual plug comparator for verifying the diameter of holes of mechanical parts, having a central support plate which supports a movable measurement unit, a protective and centering casing and a handle. The movable measurement unit comprises two movable arms each bearing a feeler, which feelers come into contact with the part to be checked. An electric cord terminating in a connector makes it possible to connect a position transducer which notes the position of the movable arms to an electrical supply, detection and indication group. A cord-holder device is fastened to one end of the handle in a removable manner. The handle has an opening which, after the removal of the cord-holder device and the detachment of the handle from the support plate, makes it possible completely to remove the handle from the cord and the connector.