Other

Johnson Controls Gmbh

Siemens Building Technologies, Inc.

Russell G Attridge, Jr

A method, as well as a controller, for controlling room temperature within a variable air volume system having a plurality of zones wherein the thermal transfer rate with respect to each of such zones is maintained at a substantially constant value notwithstanding changes in the temperature of the supply air thereby providing improved efficiency and environmental comfort.

Variable air volume system including BTU control function

A method, as well as a controller, for controlling room temperature with a variable air volume system having a plurality of zones wherein the thermal transfer rate with respect to each of such zones is maintained at a substantially constant value notwithstanding changes in the temperature of the supply air thereby providing improved efficiency and environmental comfort.

A fail-safe closed damper for installation in a system of ducts. The damper includes at least one damper blade connected to a spring-loaded shaft. A power-actuated unit is employed to disengage a coupling which interconnects the spring-loaded shaft to an operating linkage. The use of the power-actuated unit ensures that the damper will be tripped at the appropriate predetermined temperature and will not be affected by the large frictional forces imparted on the components of the damper by the biasing spring or by such external factors as dust, humidity and dirt. The damper employs a sensor having dual sensing devices and which is centrally disposed in the duct to ensure receipt of a representative sample of airflow. The damper further includes a damper blade position indicator for sensing whether the damper blade is open or closed.

Remotely trippable and resettable damper

A fail-safe closed damper for installation in a system of ducts. The damper includes at least one damper blade connected to a spring-loaded shaft. A power-actuated unit is employed to disengage a coupling which interconnects the spring-loaded shaft to an operating linkage. The use of the power-actuated unit ensures that the damper will be tripped at the appropriate predetermined temperature and will not be affected by the large frictional forces imparted on the components of the damper by the biasing spring or by such external factors as dust, humidity and dirt. The damper also employs a sensor which may be mounted at any remote location within the ventilation system. Alternatively, a plurality of interconnected sensors capable of providing additional sensing capability may be employed.

Growing community of inventors

Sunapee, NH, United States of America

Russell G Attridge, Jr