Apparatus control system

Abstract

In the present invention, the control system comprises a number presetter in the form of a switch board including a certain number of, say five, pushbutton switches. By depressing them sequentially and selectively in a desired order, an arbitrarily selected number code signal can be delivered. This number code signal may have five or seven digits, as an example. Further, there is a first memory which has a predetermined memory content representing a permanent code signal specifically selected at a vehicle manufacturing stage which is unique to the automotive vehicle under consideration. As an example, this may be '5 - 1 - 4 - 3 - 2 - 1- 5'. Further, there is a first comparator adapted for comparison of the permanent memory content in the first memory, with an arbitrary number code signal generated at and delivered from the switch board. If there is coincidence between the both signals, the switch board's outlet signal is conveyed to a second memory. There is a second comparator adapted for comparison of the switch board output or arbitrary code signal with the content of the second memory. An address counter is provided with functions to deliver address signals to said first and second memories upon reception of the arbitrary code signal from the switch board. There are further provided a first and a second shift register adapted for receiving output signals from the first and the second comparator, respectively.