Abstract: The disclosure is directed to the method of addition, in a fixed and inexpensive way, of a cylindrical sleeve to a key for an anti-theft wheel lug nut having a complementary key pattern formed on a surface thereof, and to the resulting key. The cylindrical sleeve of the key is formed separately from the key and then rigidly attached onto a groove formed in the key itself. The sleeve acts as a guide for the key and prevents the dismounting thereof during the torquing and untorquing of the complementary patterned lug nut.

Abstract: By storing, along with each signal or bit controlling a step to be taken in a process sequence, an additional signal or bit to be applied to the gating terminal or pin of respective ones of a plurality of "and" gates, to the other input terminal of each of which is supplied its respective input signal from aprocess control element, such as a sensor, switch or valve (each such input signal indicating a changed condition in the process which requires a changed process control sequence) any sequence may be interrupted following any step in that sequence and a new sequence may be called up to make the needed correction or change in the process.