Abstract: A centrifugal blower assembly of the type having a finned barrel portion to be driven by a shaft by rotation about a longitudinal axis of rotation has the barrel portion divided longitudinally to provide two separable halves. A central hub assembly for securement of the barrel portion to the shaft similarly is divided in separable portions each carried by a respective barrel half. Split clamps secure the hub assembly portions about the shaft in integral relation with the shaft. End rings extending around the barrel at its ends similarly are split into half-ring portions each carried by a respective barrel half. Tongue-like brackets and associated recesses of the half-ring portions secure them in integral relation about the shaft. The blower assembly may be installed and removed from the shaft without its removal.

Abstract: A warehousing system which comprehends an arrangement of a predetermined number of axially parallel storage racks defining access aisles therebetween which are alternatingly for supply and picking purposes. Each rack comprises tiered compartments having open input ends upon the supply aisles and open discharge ends upon the picking aisles. Said racks are bounded at their opposite ends by a truck dock and a traffic flow floor zone continuous with a railway siding. A first merchandise inbound conveyor, axially perpendicular to the racks, is located above the railway siding, and a second such inbound conveyor axially parallel to the racks is along one side of the assemblage thereof. An outbound conveyor, axially perpendicular to the racks, extends above the truck dock and communicates with each picking aisle by conveyor extensions.