| 主权项 |
1. An electrical testing apparatus for testing an electrical test sample, comprising: a conductor substrate electrically connected to a test head via a contact spacing converter, wherein the conductor substrate is mechanically connected to and stiffened by a first stiffening device;
a plurality of spacers mechanically connected to the contact spacing converter and held on the first stiffening device by a tilt adjuster, the spacers being spaced apart from one another, penetrating the conductor substrate, being configured as threaded screws, wherein a shaft of each threaded screw penetrates a respective guide aperture of the conductor substrate with room to spare and engages in a respective receptacle of the first stiffening device, wherein each receptacle has a section of large diameter provided with an internal thread, an unthreaded section of smaller diameter adjacent the section of large diameter, and another unthreaded section of yet smaller diameter than the diameter of the section of smaller diameter, and wherein the section of yet smaller diameter has play relative to the shaft of an associated threaded screw; a nut screwed onto a thread of each threaded screw, each nut including a flange having a first side that rests against a step provided between a section of large diameter and a section of smaller diameter; a screw ring situated on a second side of each flange opposite the first side of the flange, the screw ring having an external thread which is screwed into the internal thread of the section of large diameter, wherein the screw ring presses the nut against the step in a screwed-on state. |
