Truth Division of Spx Corporation

Truth Hardware Corporation

Scott D McMillan

Thomas J Midas

An improved window operator has an electrically controlled drive for moving a window between opened and closed positions in response to a command. A plurality of switches are provided for manually or remotely commanding movement of the drive to move the window to a select desired position between the opened and closed positions. A position sensing routine senses actual position of the window between the open and closed positions. The position sensing routine includes a timer for storing a value representing actual position. The value is selectively incremented or decremented at a select rate in response to duration of operation of the drive to move the window between the open and closed positions. The control senses electrical power supplied to the drive. An adjustment routine adjusts the select rate of the timer in response to electric power deviating from a select desired power level. The control compare the desired position to actual position and controls an output coupled to the drive for developing an electrical signal to control the drive in response to a difference between the select and actual positions to minimize the difference.

Window operator control

A universal electrical control selectively drives either plural motorized window operators for opening or closing one or more windows, or a motorized window operator and plural motorized locks for opening, closing and locking a window. The electrical control comprises an interface circuit for connection to plural output devices comprising either motorized window operators or motorized window locks. An input switch commands window movement to an open or close position. A control circuit is connected to the interface circuit and the input switch and includes an initialization mode for determining if each output device is a motorized window operator or a motorized lock, and output drive mode operable in response to a command from the input switch for driving the output devices through the interface circuit in a lock sequence or a window sequence dependent upon the initialization mode respectively determining if a motorized window lock is connected or is not connected to the interface circuit. The lock sequence comprises opening any lock prior to opening the window and closing the window prior to closing the lock. The window sequence comprises driving the plural motorized window operators in a select desired sequence.

Electronic switch assembly for motorized window system

A skylight operator includes a chain drive driven by a motor. Polarity of power applied to the motor is controlled to selectively open or close the window. Polarity is controlled by an H-bridge switching circuit driven by a microcontroller. The microcontroller receives commands from any one of a plurality of control devices The operator includes a feedback circuit using a hall effect sensor in connection with a ring magnet on the motor shaft for sensing incremental movement of the motor, representing movement of the window. A potentiometer control device allows unattended full or partial opening of the window. A user need only turn the potentiometer knob to a desired amount of opening. The microcontroller in response to such a command compares the command to the feedback signal and controls the motor to minimize the difference between the two.

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Owatonna, MN, United States of America

Scott D McMillan