AIR DUCT DAMPER:THERMOSTATICALLY CONTROLLED

• Main Author: WHITE T.M
• Format: Patent
• Language: English
• Published: 18.11.1983
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; CONTROLLING; HEATING; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; RANGES; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; VENTILATING; WEAPONS

A damper blade control for regularing the flow of conditioned air through a supply air duct and into a zone. The control comprises an electric motor for use with a source of electrical energy for moving the damper blade between a minimum air flow position and a maximum air flow position, and a thermostatic switch electrically positioned between the motor and the source of electrical energy for connecting the motor thereto to change the position of the damper blade in response to changes in the temperature of the zone. The control further comprises maximum and minimum flow switches disposed outside the supply air duct for disconnecting the motor from the source of electrical energy when the damper blade reaches, respectively, the maximum and minimum air flow positions. An indicator lever is located outside the supply air duct and supported thereby for movement in response to movement of the damper blade for indicating the position thereof, and the indicator lever actuates the maximum and minimum flow switches to disconnect the motor from the source of electrical energy when the damper blade reaches, respectively, the maximum and minimum air flow positions. Adjustable securing brackets are provided to adjustably secure the maximum and minimum flow switches to the supply air duct, the position of the maximum and minimum flow switches being adjustable to vary the maximum and minimum air flow positions of the damper blade.