Abstract: A control system for a turbine blade, including: an operational control element for generating and outputting an operational control signal, the operational control signal for non-emergency operation of a motor for controlling pitch of the turbine blade; an emergency control element, separate from and different from the operational control element, for generating and outputting an emergency control signal for emergency operation of the motor; and, an output stage element for receiving the operational and emergency control signals and for selecting one of the operational or emergency control signals, and with a means for receiving power for operation of the motor and with a means for providing the received power to the motor according to the selected operational or emergency control signal.

Abstract: In a wind turbine/generator having a rotatable hub, at least one blade rotatably secured to the hub, a pitch control system for adjusting pitch of each blade, the pitch control system located within the rotatable hub, a stationary nacelle, and a slip ring assembly at a junction of an electrical circuit between the rotatable hub and the stationary nacelle, the slip ring assembly operatively arranged for transmission of electrical signals between equipment located within the rotating hub and equipment located within the stationary nacelle, an apparatus for grid loss ride-through for the pitch control system, comprising for example, operational amplifiers for sensing and monitoring power on the rotating side of the slip ring assembly, and, a contactor coil, for example, for supplying power to the pitch control system from a backup power source when the sensed power drops to a predetermined level.

Abstract: A method and apparatus for automating hub and spoke network trouble diagnostics in a communication network are disclosed. For example, the method retrieves provisioning and configuration data, access interface alarm information, and network facility status data related to the communication network by a diagnostic system, and identifies at least one of: a network configuration error, an access interface error, or a configuration error associated with at least one hub router or at least one spoke router, as the root cause of the problem of the communication network.

Abstract: A control system for a turbine blade, including: an operational control element for generating and outputting an operational control signal, the operational control signal for non-emergency operation of a motor for controlling pitch of the turbine blade; an emergency control element, separate from and different from the operational control element, for generating and outputting an emergency control signal for emergency operation of the motor; and, an output stage element for receiving the operational and emergency control signals and for selecting one of the operational or emergency control signals, and with a means for receiving power for operation of the motor and with a means for providing the received power to the motor according to the selected operational or emergency control signal.

Abstract: In a wind turbine/generator having a rotatable hub, at least one blade rotatably secured to the hub, a pitch control system for adjusting pitch of each blade, the pitch control system located within the rotatable hub, a stationary nacelle, and a slip ring assembly at a junction of an electrical circuit between the rotatable hub and the stationary nacelle, the slip ring assembly operatively arranged for transmission of electrical signals between equipment located within the rotating hub and equipment located within the stationary nacelle, an apparatus for grid loss ride-through for the pitch control system, comprising means for sensing and monitoring power on the rotating side of the slip ring assembly, and, means for supplying power to the pitch control system from a backup power source when the sensed power drops to a predetermined level.

Abstract: A method and apparatus for automating hub and spoke network trouble diagnostics in a communication network are disclosed. For example, the method retrieves provisioning and configuration data, access interface alarm information, and network facility status data related to the communication network by a diagnostic system, and identifies at least one of: a network configuration error, an access interface error, or a configuration error associated with at least one hub router or at least one spoke router, as the root cause of the problem of the communication network.

Abstract: A clean and capture tool 1 to service floor surfaces. The tool 1 includes brackets between which there extends a circular cleaning head 3. The head 3 includes an outer cover 6 below which there is located a rotatably driven arm 3 which directs water sprays at the floor surface. The cover 6 includes a downwardly facing peripheral channel 8 to which a vacuum is delivered to withdraw water and loosened dirt and waste material from the surface being cleaned.

Abstract: Apparatus and method for printing sound code icons on photographic prints produced from filmstrips having images with varying orientation, size and or format. A sound-on-print print gate includes a pair of selectable LED icon printers for printing a binary coded sound icon on either edge of the photographic print depending on normal or inverted image orientation. The icon printers are mounted for translational movement lengthwise of the print paper, the positioning being determined by the format of the print: panoramic, normal or HDTV aspect ratios. A computer controlled system is disclosed which determines the orientation, size and format and positions the icon printers in response thereto at the print gate.

Abstract: A method is described for communicating printing instructions on exposed photographic film to photo finishing equipment to enable imaging parameters to be set automatically which includes the steps of splicing a first exposed strip of film to a second exposed strip of film with a film-splicing label, encoding the label with low resolution indicia, and feeding the spliced first and second films to a film-splicing label reader for reading the code and automatically setting the parameters for printing. A film-splicing label encoded with indicia for identifying the scene orientation, the number of prints and/or whether sound is to be provided.

Abstract: A multipole circuit breaker having a single contact operating mechanism for all poles and a fault current sensing means for automatic tripping of the breaker is provided with alarm switch means to indicate when opening of the circuit breaker has been caused by a fault condition. The operating mechanism includes a metal frame to which a latchable cradle is pivotally mounted. The frame includes parallel guide slots through which a formed pin actuator extends to be moved by the cradle as it operates between its latched and released (tripped) positions. A spring connected between the mechanism frame and the pin actuator biases the latter toward the cradle. An insulating extension element is adjustably mounted on the actuator to transmit motion of the latter to operate a switch in an alarm circuit, in accordance with cradle position.