Registers – Systems controlled by data bearing records – Time analysis
Patent
1976-08-23
1978-02-07
Ruggiero, Joseph F.
Registers
Systems controlled by data bearing records
Time analysis
364900, G06F 1104
Patent
active
040728528
ABSTRACT:
A digital computer monitoring and restart circuit monitors the presence of periodic output signals from the digital computer by a missing pulse detector. When the detector senses a missing output signal from the computer, it indicates this detection operation by an output signal representation of the fact that the computer is not operating. In response to this output signal a restart pulse is generated by a restart pulse generator and is applied to the computer to restart the computer and to reset the monitoring circuit. Concurrently, a 5-second timer circuit is started. While the timer circuit is operating over its 5-second interval, if the monitoring circuit produces another output signal indicating that the computer is not operating, the 5-second timer is stopped and another restart operation is not attempted. If the 5-second timer is allowed to run to the end of the 5-second interval without the detection of a computer outage, the monitoring and restart circuit is reset by the 5-second timer to an initial state indicative of the continuing operation of the computer while awaiting a subsequent computer outage.
REFERENCES:
patent: 3229251 (1966-01-01), Homan et al.
patent: 3517171 (1970-06-01), Avizienis
patent: 3749897 (1973-07-01), Hirvela
patent: 3795800 (1974-03-01), Nimmo et al.
patent: 3868647 (1975-02-01), Zanoveld
Hogan James A.
Sklaroff Morton
Burton Lockwood D.
Halista Mitchell J.
Honeywell Inc.
Marhoefer Laurence J.
Ruggiero Joseph F.
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