Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1977-05-05
1978-09-05
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
73517R, 307234, 307362, 328111, 328115, 328 1, H03K 5153, H03K 518
Patent
active
041123174
ABSTRACT:
A pulse detection system comprises, in series, a pulse amplitude detector, pulse width detector and a recorder. The pulse amplitude detector comprises a voltage comparator having an input for receiving a voltage pulse, a reference d.c. voltage input, a ground and an output for producing an output voltage when the input pulse equals a predetermined fraction of the reference voltage. The pulse width detector comprises a positively-triggered monostable having: a trigger input connected to the comparator output, a ground, a RESET, a RESET reference, a reference d.c. voltage input connected through a resistor to the RESET and through a capacitor to the RESET reference, and a Q output; and a positive-going clocked flip-flop having a clock input connected to the Q output of the monostable, a data input connected to the comparator output, a ground, a reference d.c. voltage input, a RESET, and a Q output connected through a delay resistor to the RESET and through a capacitor to ground. The recorder is a conventional digital counter.
REFERENCES:
patent: 3493782 (1970-02-01), Georgi
patent: 3676699 (1972-07-01), Warren
patent: 3879662 (1975-04-01), Barneck
Edelberg Nathan
Erkkila A. Victor
The United States of America as represented by the Secretary of
Yarmovsky Max
Zazworsky John
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