Reset controller with improved air flow span adjustment

Details Reset controller with improved air flow span adjustment Reset controller with improved air flow span adjustment

1981-12-14

1983-11-08

Tapolcai, William E.

Automatic temperature and humidity regulation

Ventilator type

137486, 74522, F24F 1310

Patent

active

044137761

ABSTRACT:
A controller for a damper maintains a substantially constant volumetric rate of flow of air through a duct into a controlled space for a given condition in the space and resets the rate of flow as a function of at least one sensed condition which causes changes in a control pressure. A dual lever system enables the controller to be calibrated to establish various air flow spans while utilizing substantially the full available range of control pressure to effect a change in air flow within each selected span.

REFERENCES:
patent: 2190506 (1940-02-01), Wurr
patent: 2194533 (1940-03-01), Van Dyke
patent: 2256121 (1941-09-01), McCarty
patent: 2793540 (1957-05-01), Cronk
patent: 3809314 (1974-05-01), Engelke et al.
patent: 4074588 (1978-02-01), Cumming
patent: 4104939 (1978-08-01), Bonaddio
patent: 4264035 (1981-04-01), Maxson et al.

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