Differential pulley in collaboration with Richard and George Tangye. According to Richard Tangye's autobiography, the Weston differential pulley evolved from the Chinese windlass, with an endless chain replacing the finite length of rope. He claimed that many engineering firms conceded on the difficulty of efficiently disengaging the chain from the teeth as the pulleys turned, but his firm developed a "pitch" chain which solved the issue. Marketed as "Weston Differential Pulley Blocks with Patent Chain Guides", the pulley had good sales, namely, 3000 sets in 9 months. It was displayed in 5 sizes — from to — at the 1862 International Exhibition
Rigging (material handling) Rigging (material handling) Rigging is both a noun, which is the equipment and a verb, which is the action of designing and installing the equipment, in the preparation to lift, lower, hoist or move objects. A team of "riggers" design and install the lifting or rolling equipment needed to raise, roll, slide or lift objects such as with a crane or block and tackle. "Rigging" comes from "rig", to set up or prepare. Rigging is the equipment such as wire rope, turnbuckles, clevis, jacks and slings used with cranes and other lifting equipment in material handling and structure relocation. Rigging