Abstract: Apparatus for concentrating gold-containing particulate material includes a housing containing an endless conveyor belt the upper stretch of which is inclined in the direction of its movement. An infeed hopper adjacent the upper end of the belt functions to deposit gold-containing particulate material on the upwardly moving upper stretch of the belt, and said stretch is inclined sufficiently to cause the particulate material to move downwardly over the upwardly moving upper stretch in a manner to effectuate classification of the particulate material by gravity separation into a minor fraction of valuable particles of smaller size and heavier specific gravity, including fine and microfine gold particles, and a major fraction of tailings particles of larger size and lighter specific gravity.

Abstract: A rail car is adjustable in length to accommodate the mounting thereon of cargo containers of various lengths and widths, such as the presently employed 20 foot, 40 foot, 45 foot and 48 foot lengths and 96 and 102 inch widths. Length adjustment is effected either by forming the rail car frame in two telescopic end sections, or by providing an extensible coupling tongue on one or both ends of the rail car frame. The rail car also may incorporate a collapsible fifth wheel connector for the king pin of a cargo container trailer chassis to accommodate transport of a trailer-mounted cargo container. The rail car also includes structure by which it may be manipulated by external lifting equipment to stack a plurality of the rail cars one atop another, either for stationary storage in a rail yard or for transport in a train to another location.

Abstract: The wheeled frame remaining after removal of the detachable cargo container, is gripped by clamping mechanism of a carrying unit mounted on a tractor or lift truck, then elevated above the ground and pivoted from its normal horizontal disposition to vertical position, and then transported to a multiple storage unit where it is deposited and retained in the vertical position removably in one of a plurality of compartments making up the storage unit. A plurality of such wheeled frames may be stored in this manner by deposit in successive ones of the compartments, and they are removed from the compartment in the reverse order of deposit.

Abstract: The wheeled frame remaining after removal therefrom of the detachable cargo container, is gripped by clamping mechanism of a carrying unit mounted on a tractor or lift truck, then elevated above the ground and pivoted from its normal horizontal disposition to vertical position, and then transported to a multiple storage unit where it is deposited and retained in said vertical position removably in one of a plurality of compartments making up the storage unit. A plurality of such wheeled frames may be stored in this manner by deposit in successive ones of the compartments, and they are removed from the compartment in the reverse order of deposit.