Whether you call them pulleys, sheaves, or blocks, these ancient devices make light work of heavy loads. A single pulley can cut the amount of force needed to lift an object in half. Multiple pulleys threaded with rope or wire, known as block and tackle, can reduce the energy required to hoist an object into the air even more.
Strictly speaking, the blocks of a pulley are the wood, bronze, brass, or cast-iron pieces that sandwich the grooved sheave, which can be made of just as many different types of materials. Most pulleys have no more than three sheaves because at a certain point the friction created by pulling a rope through that many channels offsets the benefit of the block-and-tackle system itself.
One of the most common types of pulleys collected by fans of Americana is the barnyard pulley, which usually featured wood blocks, metal sheaves, and a cast iron hook. Other barn...
Of course, many antique and vintage pulleys spent their working lives aboard ships and sailboats, doing everything from setting sails to hauling cargo from the end of a boom onto a boat’s deck, into its hold, or ashore. Vintage pulleys acquired by contemporary collectors may also have been attached to the ends of heavy steel davits, which are commonly used to lower lifeboats and other small craft from a larger vessel into the sea.