Abstract: A multi-mode hand truck is convertible to assume a hand-truck mode, a reclined load-assist mode, and a push-cart mode.

Abstract: A hand truck includes a base and a toe-plate shelf coupled to the base. The base includes a truck frame and a wheel unit coupled to the truck frame.

Abstract: A stepladder includes a step frame having legs and steps and a tray unit coupled to the step frame. The tray unit includes a utility tray mounted for pivotable movement relative to the step frame.

Abstract: A system for measuring differential gravity at two points is disclosed. In the illustrative embodiment, the system uses a pair of graspers which each repeatedly grasp, raise, and drop a test mass. The accelerations of the two free-falling test masses are monitored using optical interferometry. An output signal is provided that is based on a differential acceleration of the two test masses.

Abstract: A wireless communications system suitable for use within an aircraft, such as a part of a wireless emergency lighting system (WELS) is provided. In an aircraft, EXIT signs are located throughout the interior of the aircraft, including the ceiling (general illumination), seats (floor proximity) and EXIT doors (locator/identifier). A wireless communications system uses an integrated lens antenna system that takes advantage of the quantity and location of emergency lights such that any given light will have a direct radio frequency (RF) path to several other lights. A virtual network can be created such that if the path between any two lights becomes disrupted, alternate paths will be constructed under software control.

Abstract: The present disclosure relates to platforms for ladders. More particularly, the present disclosure relates to a platform configured to be coupled to rungs of the ladder.

Abstract: A locomotive location system and method utilizes inertial measurement inputs, including orthogonal acceleration inputs and turn rate information, in combination with wheel-mounted tachometer information and GPS/DGPS position fixes to provide processed outputs indicative of track occupancy, position, direction of travel, velocity, etc. Various navigation solutions are combined together to provide the desired information outputs using an optimal estimator designed specifically for rail applications and subjected to motion constraints reflecting the physical motion limitations of a locomotive. The system utilizes geo-reconciliation to minimize errors and solutions that identify track occupancy when traveling through a turnout.

Abstract: A system and method of providing a micromirror pixel 400 that is highly resistant to bright failure states. The micromirror 400 uses an asymmetric yoke 402 to ensure the mirror is only attracted to the address electrode in one rotation direction. The landing mechanism on the other side of the torsion binge axis also is altered to allow the pixel to over rotate in the “off” direction. The over rotation ensures that light reflected by the mirror when in the off direction will miss the projection lens pupil, allowing the corresponding pixel to remain dark in both an operational and failed state.

Abstract: A lighting assembly for use in direction and guidance systems includes an elongated insulating base upon which one or more light emitting diode strips, each supporting a plurality of light emitting diodes, are positioned. A terminal housing supporting operative power systems and control apparatus is coupled to one end of the lighting assembly while the remaining end may be coupled to an end cap or connected to a further lighting assembly to increase the array size. The light emitting diodes are covered by a light transmissive material that provides physical and weather protection for the light emitting diodes.

Abstract: The device (10) for controlling a lamp including LEDs emitting light in at least two different colors comprises at least two current sources (14,16,18) of which each is assigned to a group of LEDs (20,24,26) emitting light of the same colors; and is arranged to supply these LEDs (20,24,26) with a continuous current having an adjustable amplitude. Further, the device (10) comprises a control unit (30) for controlling the current sources (14,16,18) to adjust the amplitudes of the currents generated by the current sources (14,16,18) so as to generate a desired color of the mixed light emitted by the totality of the LEDs (20,24,26), and a setting unit (36) for influencing the total current of all current sources (14,16,18) to thus set the intensity of the mixed light.

Abstract: A train location system and method utilizes inertial measurement inputs, including orthogonal acceleration inputs and turn rate information, in combination with wheel-mounted tachometer information and GPS/DGPS position fixes to provide processed outputs indicative of track occupancy, position, direction of travel, velocity, etc. Various navigation solutions are combined together to provide the desired information outputs using an optimal estimator designed specifically for rail applications and subjected to motion constraints reflecting the physical motion limitations of a locomotive. The system utilizes geo-reconciliation to minimize errors and solutions that identify track occupancy when traveling through a turnout.

Abstract: A lighting strip for use in direction and guidance systems includes an elongated insulating base upon which one or more light emitting diode strips each supporting a plurality of light emitting diodes are positioned. A terminal housing supporting operative power systems and control apparatus is coupled to one end of the lighting strip while the remaining end may be coupled to an end cap or connected to a further lighting strip to increase the array size. The light emitting diodes are encapsulated within a light transmissive material top cover to provide physical protection and seal for the light emitting diodes.

Abstract: A system and method of providing a micromirror pixel 400 that is highly resistant to bright failure states. The micromirror 400 uses an asymmetric yoke 402 to ensure the mirror is only attracted to the address electrode in one rotation direction. The landing mechanism on the other side of the torsion binge axis also is altered to allow the pixel to over rotate in the “off” direction. The over rotation ensures that light reflected by the mirror when in the off direction will miss the projection lens pupil, allowing the corresponding pixel to remain dark in both an operational and failed state.

Abstract: A train location system and method of determining track occupancy utilizes inertial measurement inputs, including orthogonal acceleration inputs and turn rate information, in combination with wheel-mounted tachometer information and GPS/DGPS position fixes to provide processed outputs indicative of track occupancy, position, direction of travel, velocity, etc. Various navigation solutions are combined together to provide the desired information outputs using an optimal estimator designed specifically for rail applications and subjected to motion constraints reflecting the physical motion limitations of a locomotive. The system utilizes geo-reconciliation to minimize errors and solutions that identify track occupancy when traveling through a turnout.

Abstract: A system and method of providing a micromirror pixel 400 that is highly resistant to bright failure states. The micromirror 400 uses an asymmetric yoke 402 to ensure the mirror is only attracted to the address electrode in one rotation direction. The landing mechanism on the other side of the torsion binge axis also is altered to allow the pixel to over rotate in the “off” direction. The over rotation ensures that light reflected by the mirror when in the off direction will miss the projection lens pupil, allowing the corresponding pixel to remain dark in both an operational and failed state.

Abstract: A lighting strip for use in direction and guidance systems includes an elongated insulating base upon which one or more light emitting diode strips each supporting a plurality of light emitting diodes are positioned. A terminal housing supporting operative power systems and control apparatus is coupled to one end of the lighting strip while the remaining end may be coupled to an end cap or connected to a further lighting strip to increase the array size. The light emitting diodes are encapsulated within a light transmissive material top cover to provide physical protection and seal for the light emitting diodes.

Abstract: A train location system and methodA train location system and method utilizes inertial measurement inputs, including orthogonal acceleration inputs and turn rate information, in combination with wheel-mounted tachometer information and GPS/DGPS position fixes to provide processed outputs indicative of track occupancy, position, direction of travel, velocity, etc. Various navigation solutions are combined together to provide the desired information outputs using an optimal estimator designed specifically for rail applications and subjected to motion constraints reflecting the physical motion limitations of a locomotive. The system utilizes geo-reconciliation to minimize errors and solutions that identify track occupancy when traveling through a turnout.