A method for testing eggs for the existence of cracks or holes in the egg shells by examining the elasticity of said shells and an apparatus for carrying out said process

摘要

Through subjecting a probe (6), from its original position at a distance from the shell, of an egg (1) to a continuous force directed at the egg's shell, forcing the probe is forced down to strike against the shell, and this results in an elastic deformation of same, whereupon the resilience of the egg shell causes it to return to its original shape, throwing back the probe, whereafter the probe (6), again as a result of the continuous force, is brought to strike against the shell once more before again being thrown back. This action is repeated several times, with decreasing oscillations, so that the probe's action seen as a whole is a bouncing movement against the said egg shell. This movement is in principle observed as a decreasing oscillation, in connection with which the amplitude and duration of each of the probe's oscillations is measured, preferably electrically, and the number of oscillations from which the amplitude and duration exceed preset parameter values is counted and registered electronically, whereupon the above cycle is repeated a given number of times (n), and distributed evenly around the said egg's axis of symmetry. The lowest registered number of oscillations from the (n) examination cycles is registered against an empirical parameter.