Simulation of logical decision networks of time-delay elements by means of a general-purpose digital computer

For the purpose of this paper, a logical decision network is defined as a system whose elements can be in either of only two states, TRUE or FALSE. Therefore the operation of the system can be described by a set of simultaneous Boolean equations which are functions of time. These states must be defined specifically for each of the elements of the system, and in particular might represent yes and no, on and off, energize and de-energize a coil, "make" and "break" of a relay contact, presence and absence of voltage at a node, open and close a mechanical valve, etc.