Abstract: A lift table includes a support table assembly mounted on a scissor arm mechanism. The support table assembly is raised and lowered automatically upon the imposition or removal of loads so that the height of the plane on which articles are being handled remains generally constant. Raising and lowering is effected via a lift spring assembly that acts without the assistance of any pneumatic or hydraulic actuators. The scissor arm mechanism of the lift table has angled arms and low-friction rollers to facilitate raising and lowering of the support table assembly and optimizing operation of the lift spring assembly. The resulting mechanically operated lift table is simple, reliable, and can be easily transported from location to location.

Abstract: A chain link, a series of which can form a chain, the links having hook means at one end and a transverse bight at the other end whereby the hook means of one link can be detachably connected to the bight of an adjacent link. The hook means are formed by the ends of the legs of the link being turned back upon themselves so as to define a relatively narrow opening between the ends of the hooks and their respective legs. A transverse slot-like recess is formed in the legs adjacent the bight and at the end of the link opposite that on which the hook means are formed. The slot-like recess defines a narrower leg portion which is of a thickness less than the opening between the ends of the hooks in the legs so that in order to detach the chain links from one another, it is necessary to fold the links together so that the narrower leg portion can be slipped transversely through the relatively narrow opening of the hook means. This interlocking construction prevents inadvertent disengagement of the chain links.