Read-only sequence control system

Details Read-only sequence control system Read-only sequence control system

1987-06-02

1989-03-21

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Determining machine or apparatus operating time or...

377 2, 377 26, G06F 1310

Patent

active

048151122

ABSTRACT:
A read-only sequence control system comprises a control unit having counters for determining the cycle time of the system and timing for the performance of various operations an EPROM and a plurality of relays responsive to data outputs of the EPROM for controlling a machine. The system has a first sensor for detecting the entrance of a work part into the machine and a second sensor for detecting discharge of the entered work part. When the second sensor does not detect the work at an end of working cycle, the control unit operates to stop the machine.

REFERENCES:
patent: 3391305 (1968-07-01), Bradwin et al.
patent: 4049952 (1977-09-01), Forsslund
patent: 4142238 (1979-02-01), Brandt et al.
patent: 4180724 (1979-12-01), Councilman et al.
patent: 4258250 (1981-03-01), Schmidt
patent: 4374423 (1983-02-01), Kundler et al.
patent: 4524449 (1985-06-01), Colling

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