Circuit for providing a common setpoint for manual and automatic

Details Circuit for providing a common setpoint for manual and automatic Circuit for providing a common setpoint for manual and automatic

1981-10-14

1984-05-29

Ruggiero, Joseph F.

Boots, shoes, and leggings

318591, 364160, G05B 702

Patent

active

044518790

ABSTRACT:
A circuit for providing a common setpoint for both automatic and manual operation of a process control system includes a process controller. A parameter of the process can be changed by changing the output of a controller. A variable input voltage to the process controller establishes the setpoint of the parameter. Changes in the variable voltage are made either manually or automatically so that a common setpoint is established for both types of operation.

REFERENCES:
patent: 3034718 (1962-05-01), Freitas et al.
patent: 3576535 (1971-04-01), Turner
patent: 3694633 (1972-09-01), Lejon
patent: 3772602 (1973-11-01), Kobayashi
patent: 4035620 (1977-07-01), Hobbs et al.
patent: 4118772 (1978-10-01), Takada
On-Off Static Output Servo Amplifier AD-800 Series by Foxboro/Jordon, Inc. IM-0483-pp. 1 to 7, Nov., 1979.
National Semiconductor, LM555/LM555C Timer, pp. 9-29 to 9-34.
North American Philips Controls, Stepper Motor IC Driver Series SAA 1027, four pages, 1977.

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