Monitoring system

Claim 1

IN A COMPUTER OF THE TYPE HAVING A MEMORY WITH APPARATUS FOR WRITING INTO AND READING FROM SAID MEMORY, AND HAVING A POWER SUPPLY FOR PROVIDING OPERATING VOLTAGES TO SAID COMPUTER, THE IMPROVEMENT COMPRISING: A VOLTAGE REFERENCE STANDARD, MEAN FOR COMPARING SAID OPERATING VOLTAGES WITH SAID VOLTAGE STANDARD AND FOR PROVIDING AN OUTPUT SIGNAL INDICATIVE OF A DEVIATION THEREFROM GREATER THAN A PREDETERMINED DEVIATION; A FLIP-FLOP CAPABLE OF ASSUMING EITHER A SET OR RESET STATE; MEANS RESPONSIVE TO SAID OUTPUT SIGNAL FOR CAUSING SAID FLIP-FLOP TO ASSUME SAID SET STATE; AN AND GATE HAVING FIRST AND SECOND INPUTS AND AN OUTPUT; MEANS FOR PROVIDING A SIGNAL INDICATIVE OF A MEMORY WRITE OPERATION; MEANS FOR APPLYING THE SET OUTPUT OF SAID FLIP-FLOP TO SAID FIRST AND GATE INPUT AND THE SIGNAL REPRESENTATIVE OF SAID WRITE OPERATION TO SAID SECOND AND GATE INPUT; MEANS RESPONSIVE TO THE OUTPUT FROM SAID AND GATE FOR PREVENTING FURTHER OPERATION OF SAID COMPUTER; AND MEANS RESPONSIVE TO A DEVIATION OF SAID OPERATING VOLTAGES FROM SAID VOLTAGE STANDARD OF LESS THAN SAID PREDETERMINED DEVIATION FOR RESETTING SAID FLIP-FLOP AFTER THE PREDETERMINED TIME INTERVAL.