Abstract: A hook block assembly for use in low overhead applications. The hook block assembly is designed for use with a wire rope hoist system and has a first sheave assembly and a second sheave assembly adjustably mounted on a crosshead with spacers for varying the distance between the sheaves on the sheave assembly. The hook block assembly is designed for use with girders or beams having flanges with different widths. The spacers provide for adjusting the distance between the sheaves on the first and second sheave assemblies to maintain a sufficient angle of loading for permissible tension on the wire ropes.

Abstract: A hoisting rope sensor assembly for use with a rope hoist. A rope guide is configured to mount around a rotating drum having a spiral rope groove defined therein. The spiral rope groove on the rotating drum is configured to receive the hoisting rope as it winds and unwinds from the rotating drum. The rope guide is configured to move laterally relative to the rotating drum to keep the hoisting rope in the spiral rope groove when winding the hoisting rope onto the rope groove or unwinding it from the rope groove. An idler sheave has a groove defined therein for guiding the hoisting rope. A magnetic flux leakage sensor surrounds the hoisting rope. The magnetic flux leakage sensor is disposed between the idler sheave and the rope guide. The magnetic flux leakage sensor and idler sheave move with the rope guide relative to the rotating drum.

Abstract: An automated packaging station is capable of being used to package objects. The automated packaging station includes a supply of web material, a surface (202), an aperture (206) therein, and a closing system. The automated packaging station is configured to form the web material into a pouch. The aperture (206) is configured such that an object can be inserted therethrough. The automated packaging station is configured to bias open the pouch beneath the surface such that the object inserted through the aperture falls into the pouch. The closing system is configured to close the pouch to form a package around the object in response to the object being inserted through the aperture. The object is capable of being shipped to a recipient in the package.

Abstract: A guide can be used to improve inflatability of web material. The guide can be in a system that also includes a supply of a web material and an inflation and sealing system. The web material includes chambers that are in fluid communication with a common channel. The web material in the supply is folded about a longitudinal fold such that lengths of the chambers are folded. The inflation and sealing system is configured to inflate and seal the chambers as the web material is fed from the supply. The guide has a guide mechanism configured to be located between portions of the web material as the web material is being fed from the supply. The guide mechanism is configured to at least partially unfold the longitudinal fold in the web material at a point in the system where the inflation and sealing system is configured to inflate the chambers.

Abstract: An automated packaging station is capable of being used to package objects. The automated packaging station includes a supply of web material, a surface (202), an aperture (206) therein, and a closing system. The automated packaging station is configured to form the web material into a pouch. The aperture (206) is configured such that an object can be inserted therethrough. The automated packaging station is configured to bias open the pouch beneath the surface such that the object inserted through the aperture falls into the pouch. The closing system is configured to close the pouch to form a package around the object in response to the object being inserted through the aperture. The object is capable of being shipped to a recipient in the package.

Abstract: The present invention discloses a power generation system including a double-fed induction generator, a power converter, and a controller. The double-fed induction generator includes a rotor and a stator coupled to a grid. The power converter includes a rotor side converter coupled to the rotor of the generator, a grid side converter coupled to the grid, and a DC bus coupled between the rotor side converter and the grid side converter. The controller includes a rotor side controller for controlling the rotor side converter and a grid side controller for controlling the grid side converter. The rotor side controller includes a compensator having a transfer function and configured to counter a negative resistance effect of the generator to suppress sub-synchronous oscillations. The present invention further discloses a system for suppressing sub-synchronous oscillations and a method for controlling operation of a power system.

Abstract: The present invention discloses a power generation system including a double-fed induction generator, a power converter, and a controller. The double-fed induction generator includes a rotor and a stator coupled to a grid. The power converter includes a rotor side converter coupled to the rotor of the generator, a grid side converter coupled to the grid, and a DC bus coupled between the rotor side converter and the grid side converter. The controller includes a rotor side controller for controlling the rotor side converter and a grid side controller for controlling the grid side converter. The rotor side controller includes a compensator having a transfer function and configured to counter a negative resistance effect of the generator to suppress sub-synchronous oscillations. The present invention further discloses a system for suppressing sub-synchronous oscillations and a method for controlling operation of a power system.