Abstract: A support apparatus for the operator's cab of an overhead crane. The crane has a rigid depending mast and an intermediate mast and carriage vertically movable on the rigid mast for lifting and carrying a load. A hoist is mounted on the crane and attached to the carriage for raising and lowering the carriage, the intermediate mast and the load at normal operating speeds. The support apparatus includes a first support affixed to the cab and the intermediate mast for supporting the cab on the intermediate mast during normal operating speeds of the intermediate mast. The first support permits detaching the cab from the intermediate mast upon the occurrence of an excessive lowering operating speed of the intermediate mast. A second support affixed to the cab and to an overhead support of the crane then supports the cab in a suspended manner and the intermediate mast drops toward the floor below the crane without the cab.

Abstract: Multi-position armrest for a vehicle seat incorporates a parallelogram linkage which permits the armrest to be raised or lowered through a series of parallel positions and locked in any one against downward movement. A ratchet and pawl arrangement permits the armrest to be tilted while in various fixed positions of the linkage, or, simultaneously as the linkage is moved. Movements of the arm or linkage in a lowering direction are controlled by a pair of manually operated buttons which operate separate, spaced apart pawls which engage different teeth on a single ratchet member. The buttons are not required for upward movement. The armrest can function as such or can be lowered to be flush with the seat so as to extend the seat width. It can also be tilted downwardly to a hip supporting position or upwardly to a vertical storage position. Various cam and stop arrangements restrict movements of the armrest outside a preferred range.