Apparatus for measuring the geometry of the hollow mold compartment of continuous casting molds

An apparatus for measuring the geometry of a hollow arc-shaped mold compartment of a continuous casting mold, said mold compartment having a polygonal cross-section including at least four corners, comprising a measuring head having a lengthwise axis and displaceable essentially in the direction of said lengthwise axis, three impact elements arranged at a first side of the measuring head, said three impact elements forming a triangle which is essentially parallel to the lengthwise axis of the measuring head, a first measuring feeler arranged at the first side of the measuring head and extending in a direction which is substantially perpendicular to the plane of the triangle, said first measuring feeler serving to bear against a neighboring wall of the hollow mold compartment of the mold, at least one resilient impact element arranged at a second side of the measuring head opposite the first side, said resilient impact element producing a force vector directed away essentially at right angles from the triangle, a second measuring feeler arranged substantially coaxially with respect to the first measuring feeler at the second side of the measuring head, the second measuring feeler serving to bear against the wall of the hollow mold compartment of the mold opposite said neighboring wall, at least one indicator element operatively connected with the measuring feelers in order to indicate the position thereof, said three impact elements defining three impact points which contact said neighboring wall of the hollow mold compartment of the continuous casting mold and form a triangle surface of said triangle, two of said impact points being arranged in a plane disposed substantially transversely with respect to the lengthwise axis of the measuring head, said measuring head having a third side which merges with the first side at an angle of approximately 90.degree., a first impact element arranged at the third side in said plane and in spaced relationship from the triangle surface defined by the three impact points, a second impact element disposed at the third side along a line extending substantially parallel to the lengthwise axis of the measuring head and through the first impact element, one of said three impact elements of said triangle defining a lower impact element, said second impact element being located substantially at the height of said one lower impact element of said triangle, a third measuring feeler arranged at the third side at a greater spacing from the triangle, a further indicator element operatively connected with the third measuring feeler, and a resilient impact element provided at a fourth side of the measuring head which is opposite the third side.