Abstract: Uniform compressive stress distribution is applied over the active area of a PEMFC stack to increase the contact area between the electrically conductive components of the stack. This increases fuel cell stack efficiency. Fuel cell stack is constructed as a modular component readily connected with like modules for providing fuel cell stack configurations capable of meeting a wide range of power generation for application to vehicles, including submersible vehicles up to utility power requirements.

Abstract: In an automatic variable speed transmission, expansible pulleys function to change the speed ratio between driving and driven shafts. The pulleys are constructed of segments or arms that are pivoted at one end to swing outwardly. Each arm includes a V-shaped groove for receiving a V-belt. At a minimum diameter, the arms form a composite solid body and at a maximum diameter, when each arm is fully pivoted outwardly, a segmented pulley is formed. Automatic speed ratio change is disclosed in both the forward and reverse direction of rotation by proper combination of the pulleys.

Abstract: A shelf mounting bracket includes a flat rectangular plate having top and bottom edges and opposite side edges. Vertically-spaced mounting hooks are bent from the plate. Flanges are bent from the opposite side edges of the plate in the same direction as the mounting hooks, and the bottom end portions of the flanges are formed with shelf support hooks facing in an opposite direction from the bracket mounting hooks. The mounting hooks are adapted to be received in vertically-spaced holes in columns of a storage rack.