Abstract: A snap gauge comprising support means; a substantially U-shaped integral member defining two movable arms carrying feelers for contacting a workpiece to be measured; transducer means coupled to the movable arms; and a Vee reference device for cooperating with a cylindrical surface of the workpiece. A rotatable pin couples the Vee reference device to the support means and permits adjustment of the position of the Vee reference device along a longitudinal direction. The gauge further comprises protective devices including a U-shaped element arranged internally with respect to the integral member, two protective elements coupled to radially bent ends of the U-shaped element, and two protective half-shells coupled to the support means.

Abstract: A gauging head for checking linear dimensions of mechanical parts comprising a substantially cylindrical casing, a stem partially arranged for sliding movement within the casing, a feeler coupled to an end of the stem external with respect to the casing for touching the part, a transducer for providing a measurement signal and a cable for connecting the transducer to an external electric unit. An additional element can be removably and adjustably coupled to the casing for limiting the pre-stroke of the stem and another additional element can be removably coupled to the casing for defining the direction of exit of the cable from the gauging head.

Abstract: Electronic gauge for checking linear dimensions of mechanical pieces, comprising a casing, at least a movable arm, a position transducer and a retraction device. The retraction device includes an electromagnet fixed to an element supported by the casing, a flat armature adjustably fixed to the movable arm and a positive stop fixed to the armature and adapted to abut against another positive stop fixed to the electromagnet.

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 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: 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: 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 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 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.

Abstract: Manual plug comparator for verifying inside diameters of mechanical parts comprising a perforated support plate, a first member of substantially U shape fastened to the plate and a second member having a base fastened to the first member, two elastically yieldable sections and two arms which are movable due to the deformations of the elastically yieldable sections. The two arms bear the elements of a position transducer and, at their free ends respective feelers adapted to touch the part to be checked.

Abstract: A gauge for checking linear sizes of mechanical parts including a handle, a nose-piece, an integral body defining two movable arms and fulcrum devices for rotational displacements of the arms, and a support plate coupled to the handle, the nose-piece and the integral body.The support plate has the form of a ring plate with two parts protruding towards the interior for defining two reference surfaces adapted to limit the opening stroke of the movable arm.

Abstract: A gauge for checking sizes of mechanical parts, particularly a plug gauge having a support, two measuring arms movable with respect to the support and a transducer for providing a signal responsive to the mutual position of the measuring arms. The measuring arms have tubular end sections defining transversal holes for housing stems carrying feelers for contacting the surface of the part to be checked. Screws coupled with threaded holes axially obtained in the tubular end sections adjustably lock the stems.