Automatic temperature and humidity regulation – Ventilator type
Patent
1976-02-25
1977-08-09
Camby, John J.
Automatic temperature and humidity regulation
Ventilator type
251 60, 251 86, 137489, 236 80R, F24F 1310
Patent
active
040405648
ABSTRACT:
A damper and control unit for controlling air flow through a conduit comprises a movable damper having a ball-joint connection with the end of an actuating rod. The actuating rod has first and second angularly related portions and the first portion serves as a pivot element for a movable actuating plate, the second portion mounting the damper. The movable or swingable plate is arranged above an expandible and contractable actuating bellows and has a stop chain associated therewith for limiting downward swinging movement thereof in the direction of bellows contraction. The bellows has a supply line leading to the conduit upstream of the damper and a control unit is interposed in the line for determining bellows pressure. Conduit pressure and/or temperature signals are supplied to the control for bellows and damper operation as a function thereof. A seat associated with the damper is uniformly and tightly engaged whereby to seal the conduit due to the floating or ball-joint damper connection with its actuator. Bellows and actuating plate arrangement externally of the conduit results in a requirement for lesser bellows operating pressures and bellows isolation from fire code regulations.
REFERENCES:
patent: 430301 (1890-06-01), Schenck
patent: 2998194 (1961-08-01), Curran et al.
patent: 3159376 (1964-12-01), Ray
patent: 3414232 (1968-12-01), Hellman
patent: 3687364 (1972-08-01), McNabney
patent: 3806027 (1974-04-01), Ginn et al.
patent: 3809314 (1974-05-01), Engelke et al.
patent: 3876138 (1975-04-01), Dean, Jr.
patent: 3945565 (1976-03-01), Lynch et al
Harris William J.
Waeldner William J.
Camby John J.
Dynamics Corporation of America
Yuen Henry C.
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