Abstract: A motor actuator for preventing a motor from drawing excess current for longer than a predetermined time delay period including dynamic brakes for simultaneously braking motor rotation when motor operation is terminated for any reason. Source voltage supplies an input to a voltage regulator which in turn supplies a regulated voltage to the motor. The actuator includes a comparator circuit that has one input connected to motor supplied regulated voltage and a second input connected to the source voltage with the voltage level from source voltage adjusted to a level that is equal to the regulated motor voltage level under normal motor operational loads. When the motor draws excessive current the voltages on the comparator inputs become unequal which causes the comparator to have an output voltage. An RC circuit from the comparator output to ground potential delays the comparator output voltage for a predetermined time.

Abstract: A control circuit for limiting the current flow to a direct-current driven motor, to reduce current spikes at motor start up, including a voltage-regulated, current-passing device for passing current from a direct voltage source to the motor, the device having a default configuration such as to permit full current flow there-across when the voltage is initially applied, a voltage drop device interposed the voltage source and the voltage-regulated, current-passing device responsive to the current flow to the motor and a variable-voltage output device responsive to the voltage drop developed in the voltage-drop device for providing a subsequently changing voltage for input to the current-passing device for limiting the current flow therethrough following initial application of the voltage.

Abstract: A control circuit for limiting the current flow to a direct-current driven motor, to reduce current spikes at motor start up, including a voltage-regulated, current-passing device for passing current from a direct voltage source to the motor, the device having a default configuration such as to permit full current flow there-across when the voltage is initially applied, a voltage drop device interposed the voltage source and the voltage-regulated, current-passing device responsive to the current flow to the motor and a variable-voltage output device responsive to the voltage drop developed in the voltage-drop device for providing a subsequently changing voltage for input to the current-passing device for limiting the current flow therethrough following initial application of the voltage.

Abstract: A control circuit for limiting the current flow to a direct-current driven motor, to reduce current spikes at motor start up, including a voltage-regulated, current-passing device for passing current from a direct voltage source to the motor, the device having a default configuration such as to permit full current flow there-across when the voltage is initially applied, a voltage drop device interposed the voltage source and the voltage-regulated, current-passing device responsive to the current flow to the motor and a variable-voltage output device responsive to the voltage drop developed in the voltage-drop device for providing a subsequently changing voltage for input to the current-passing device for limiting the current flow therethrough following initial application of the voltage.

Abstract: A control circuit for limiting the current flow to a direct-current driven motor, to reduce current spikes at motor start up, including a voltage-regulated, current-passing device for passing current from a direct voltage source to the motor, the device having a default configuration such as to permit full current flow thereacross when the voltage is initially applied, a voltage drop device interposed the voltage source and the voltage-regulated, current-passing device responsive to the current flow to the motor and a variable-voltage output device responsive to the voltage drop developed in the voltage-drop device for providing a subsequently changing voltage for input to the current-passing device for limiting the current flow therethrough following initial application of the voltage.

Abstract: A feedback, motor-operated valve, including a valve casing having an inlet, an outlet and a valve seat operably positioned therebetween, and further including a valve element movably mounted in the casing to control flow between the inlet and the outlet, the valve element adapted for screw-like movement into and out of sealing engagement with the valve seat by a valve stem rotatably mounted in the valve casing and extending through the casing exterior thereof, a reversible motor for actuating the valve including a reversible drive motor having an output shaft and drive gear which can be driven together in both a clockwise and counterclockwise direction for turning the valve element, a driven shaft interposed the motor drive shaft and the valve stem and connected to the valve stem, including a driven gear for engagement with the drive gear to effect turning of the valve element from turning the motor drive shaft, an electro-mechanical feedback operably connected to the driven shaft for providing an electric si

Abstract: A motorized control for driving a rotatable shaft-actuated device, such as a valve, comprising a base plate, a top housing, a work plate intermediate the base plate and the top housing and a plurality of stiff legs extending between the base plate and the housing, wherein drive motors are mounted on the work plate to drive a drive shaft that is attached to the shaft-actuated device. The improvement provides elastomeric bias means that remain at rest during normal operation of the control, and deform, to store energy, at the end of control travel, to be released at the begining of travel in the opposite direction, to aid the controller to break loose any binding in the valve.