Abstract: A force-limiting and damping device has a body, a tapping element, and an elastic element. The body has a connecting segment and a holding segment. The connecting segment is formed on an end of the body and has a mounting hole. The holding segment is formed on the body opposite the connecting segment. The tapping element is connected to the body to move relative to the connecting segment. The elastic element is mounted between the tapping element and the connecting segment to abut against the tapping element and to enable the tapping element to move relative to the connecting segment. The structural relationship between the connecting segment, the tapping element, and the elastic element may provide a delayed rebound and damping effect to the reaction force, and the applied force is continuously transferred to a tapping object, and this may reduce noise and the loss of energy.

Abstract: A method an apparatus for recording and reproducing the path of insertion of a cast on a dental surveyor uses an iterative method to enable rapid equalization of the height of three points on the cast by first rotating the table on which the cast is situated about a spindle supported by two mutually perpendicular pivotal adjustment arms so that a line connecting two of the points a,b is as close as possible to being parallel with a long axis of a generally horizontal one of the pivotal adjustment arms, pivoting the horizontal adjustment arm so that points a,b are at an equal height, pivoting the generally vertical adjustment arm so that point a and a third point c are at an equal height, readjusting the horizontal adjustment arm so that points a and b are again at an equal height, readjusting the vertical adjustment arm so that points a and c are again at an equal height, and so forth until all three points are at the same height.

Abstract: The present disclosure relates to a method and an apparatus for recording and reproducing the path of insertion of a cast on surveyors. In the method, the accuracy and speed of recording the path of insertion is easily effected with the help of a scoring tool and an adjustable surveyor table on which a cast is secured and the spatial relationship of the cast with respect to the scoring tool can be easily adjusted, facilitating parallel line making on the cast in one aspect and the reorientation of the cast in another aspect.