Automatic temperature and humidity regulation – Motors – Fluid-operated
Patent
1977-03-23
1978-06-13
Wayner, William E.
Automatic temperature and humidity regulation
Motors
Fluid-operated
137 86, 236 87, H01M 486, G05B 1150
Patent
active
040944638
ABSTRACT:
A system is disclosed for providing reset action in a controller, having an averaging circuit for supplying a pilot signal which is the average of an input signal and a feedback signal, a relay having an input connected to receive the pilot signal for providing an output signal which bears a predetermined relationship with the pilot signal, the output signal being connected in a feedback circuit to supply the feedback signal to the averaging circuit, and a capacity which is either connected to the feedback circuit to delay only the feedback signal or connected between the averaging circuit and the relay to delay both the output signal and the feedback signal. The input signal may be a controller output such as a control variable and the output signal may be used to control a control element such as a condition affecting the control variable.
REFERENCES:
patent: 2285540 (1942-06-01), Stein et al.
patent: 2481395 (1949-09-01), Carns
patent: 2612902 (1952-10-01), Ward
patent: 3059854 (1962-10-01), Fehlinger
Honeywell Inc.
Joike Trevor B.
Wayner William E.
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