Device for automatically monitoring the operating states of cont

Details Device for automatically monitoring the operating states of cont Device for automatically monitoring the operating states of cont

1974-05-21

1976-04-27

Shaw, Gareth D.

Registers

Platform operated

Platform actuated traffic counters

235 92QC, 235 92CA, 235 92PD, 235 92R, 340248R, 340213Q, H03K 2106

Patent

active

039529444

ABSTRACT:
A sequence control monitoring device is disclosed which receives from controlled-objects operated under a sequence control system signals independently representing the operating states of the individual controlled-objects. The monitoring device counts the time duration for which each input signal remains in its on or off state, compares the counted value with a preset value, and thus judges whether the operating state of the controlled-object is correct.

REFERENCES:
patent: 3086708 (1963-04-01), Berkowitz et al.
patent: 3500024 (1970-03-01), Stacy et al.
patent: 3581068 (1971-05-01), Wyatt
patent: 3674991 (1972-07-01), Isvetkov

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