Abstract: An adaptive stepper for adjusting welding heat boost to compensate for deterioration (flattening) of the electrode tips of a welder. Heat boost is provided to the welder as a function of expulsion rather than by a series of linear step profiles specified by a weld engineer. An operator sets up an adaptive schedule based upon an expected resistance difference between consecutive half-cycles considered to be "normal." If differences equal to or less than the normal level are detected during a group of welds, the heat boost will be incremented by 1% after a preprogrammed number of welds have been made. If differences greater than normal are detected, indicating expulsion, the boost will be decremented immediately by 1% between increases, if decrements are allowed at the time.

Abstract: An improved padlock, and in particular, one having a lock body which has a pivot at one end and a lock mechanism at its other end, a shackle having two legs of equal length where one leg is connected to an elliptical connecting end and the other leg is connected to a notch.

Abstract: This invention relates to a wirelock protector and in particular to one including a lock housing, a latching and a lock shell. The lock housing is to prevent dirt or water from permeating into a lock. The latch housing has the same function as to prevent dirt or water from permeating into a latch. The lock shell is to fix the lock housing at a fixed place to prevent the lock from hitting and damaging the locked body.