Marposs Societa' Per Azioni

Alessandro Forni

Roberto Baruchello

Antonio Gambini

A touch probe with an arm () coupled to a movable arm-set () supported in a casing () includes an electric switch () with a housing () fixed to the casing and a mechanical transmission device () for mechanically transmitting displacements of the arm, and causing the disengagement of a conductive small ball () from two stationary conductive bars (), thereby opening an electric detecting circuit. At the interior of the probe casing, a sealingly closed chamber houses the switch and is filled with inert gas, for example nitrogen, for protecting the electric contacts.

Touch probe comprising a switch with contacts protected by inert gas

A touch probe is provided with an arm coupled to a movable arm-set and supported in a casing. The touch probe includes an electric switch with a housing fixed to the casing, and a mechanical transmission device for mechanically transmitting displacements of the arm, and causing the disengagement of a conductive small ball from two stationary conductive bars, thereby opening an electric detecting circuit. An elongate mechanical body of the mechanical transmission device includes a spherical-shaped element that is transversally urged against a guide surface, having at least a binary surface, for guiding with accuracy and free of clearances the displacements of the elongate mechanical body. A bent flat spring contacts a plane portion of the spherical transmission element for achieving both transversal thrust against the guide surface and the antirotation of the elongate mechanical body.

Growing community of inventors

S. Giovanni in Persiceto, Italy

Alessandro Forni