Abstract: A modular metal hydride hydrogen storage system which can provide a robust and reliable source of hydrogen that can quickly and easily be modified for a variety of applications and environments. The hydrogen storage system comprises at least one storage module. Each storage module comprises a container having at least one open end, a metal hydride hydrogen storage means, means for introducing gaseous hydrogen into and withdrawing gaseous hydrogen from the container, and means for connecting storage modules together end-to-end to form a plurality of storage modules.

Abstract: A modular metal hydride hydrogen storage system which can provide a robust and reliable source of hydrogen that can quickly and easily be modified for a variety of applications and environments. The hydrogen storage system comprises at least one storage module. Each storage module comprises a container for storing metal hydride and gaseous hydrogen, and an adapter for connecting storage modules together end-to-end to form a connected sequence of storage modules.

Abstract: An improved walking mechanism for a drag line excavator. The drag line excavator has a tub intended to rest upon ground with a house and boom rotatable on the tub. Movement of the excavator is accomplished by large spuds at each side of the house each carrying an elongate shoe for ground contact when the spud is lowered by a crank to raise a part of the machine off the ground and drag the rest over the ground in incremental "steps" to move the excavator. The present invention provides a structure allowing the machine to pick up a greater proportion of the excavator weight relative to the weight to be dragged over the ground without changes in the walking mechanism power and drive and without changes affecting the location of the walking center of gravity or the working center of gravity of the excavator.

Abstract: A boom point assembly is provided with a sheave or sheaves that are swivel mounted to allow the sheaves and the cables supported thereby to swing sidewise relative to the centerline of the boom without applying substantial twisting forces on the boom and without causing undue wear on the sheaves or on the cables. The cross-shaft or pin for supporting the sheave or sheaves is mounted in the side cheeks of the boom point assembly with the axial thrust from the sheave bearings and mount being transverse to the cross-shaft or pin and being transmitted through a support pylon to the chords of the boom frame.