Abstract: A tire chock with improved ease of use and prevention of theft. A threaded rod expands a scissor frame to force foot plates against a tire. The scissor frame foot plates are pulled apart or pushed together so that the frame fits between the tires. A hand-adjustable, freely rotatable nut is on the lower end of the rod is tightened. A wrench is used to tighten a second nut on the upper end of the rod, and a lock member is secured over the second nut.

Abstract: A railway vehicle truck mounted brake rigging includes spaced apart first and second brake beams, a horizontally disposed first transfer lever having a pivotal connection with one brake beam and further having an upturned flange, a link seated horizontally on the shoulder, a horizontally disposed second transfer lever having a pivotal connection with another brake beam, a first force-transmitting member passing through the first opening of the bolster for pivotal connection with each of the link and the second transfer lever, the pivotal connection is offset in a vertical direction from a horizontal plane defined by the first transfer lever, and a second force-transmitting member passing through the second opening of the bolster for pivotal connection with opposed ends of the respective first and second transfer levers.

Abstract: A linkage interconnecting a brake rod with a brake lever in a brake system of a railroad freight car. A length of chain extends from an end of the brake rod, and a monolithic connecting link interconnects an opposite end of the length of chain with a brake lever, so that the brake lever can be moved by pulling the rod, and yet the brake lever is free to move toward the rod if the handbrake system is not in use to keep the brakes applied.

Abstract: A tire chock having an at least partially threaded rod; a first trunnion having an aperture therethrough that receives the rod; first and second locking members, one locking member being rotatably fixed relative to the rod, the other locking member being rotatably fixed relative to the first trunnion. A tire chock may alternatively have an at least partially threaded rod; an upper trunnion rotatably attached to the rod; a lower trunnion threadedly attached to the rod, the lower trunnion translating axially relative to the rod upon rotation of the rod relative to the lower trunnion; a pair of linkage arms, the pair of linkage arms forming an X-shape, each linkage arm being connected to the lower trunnion by a drive arm and being connected to the upper trunnion by a support arm, wherein, as the rod is rotated relative to the lower trunnion, the linkage arms expand or contract.