Comment, Like, & Favorite
Nautical - Boat - Block And Tackle
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 pulleys were more decorative, with embossed or pierced cast-iron blocks and handsome wooden sheaves. Regardless of their design, these pulleys were typically used to lift bales of hay into the lofts of barns. Pulleys at the top of wells tended to be more decorative than those mounted under the eaves of barns since they were so much more visible to the user.
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.
November 23rd, 2012
Viewed 2,931 Times - Last Visitor from Moscow, 48 - Russian Federation on 07/11/2014 at 9:00 PM
copy and paste to your website / blog - preview
paul ward framed prints, pulley framed prints, block and tackle framed prints, vintage framed prints, boat framed prints, ship framed prints, water framed prints, nostalgic framed prints, nostalgia framed prints, dead eye framed prints, wood framed prints, wooden framed prints, wood pulley framed prints, old pulley framed prints, ocean framed prints, ship pulley framed prints, old fashioned framed prints, gift for framed prints, steampunk framed prints, industry framed prints, hoist framed prints, sail framed prints, sailor framed prints, sailing framed prints, wood grain framed prints, paul ward greeting cards, pulley greeting cards, block and tackle greeting cards, vintage greeting cards, boat greeting cards, ship greeting cards, water greeting cards, nostalgic greeting cards, nostalgia greeting cards, dead eye greeting cards, wood greeting cards, wooden greeting cards, wood pulley greeting cards, old pulley greeting cards, ocean greeting cards, ship pulley greeting cards, old fashioned greeting cards, gift for greeting cards, steampunk greeting cards, industry greeting cards, hoist greeting cards, sail greeting cards, sailor greeting cards, sailing greeting cards, wood grain greeting cards, paul ward prints, pulley prints, block and tackle prints, vintage prints, boat prints, ship prints, water prints, nostalgic prints, nostalgia prints, dead eye prints, wood prints, wooden prints, wood pulley prints, old pulley prints, ocean prints, ship pulley prints, old fashioned prints, gift for prints, steampunk prints, industry prints, hoist prints, sail prints, sailor prints, sailing prints, wood grain prints, paul ward posters, pulley posters, block and tackle posters, vintage posters, boat posters, ship posters, water posters, nostalgic posters, nostalgia posters, dead eye posters, wood posters, wooden posters, wood pulley posters, old pulley posters, ocean posters, ship pulley posters, old fashioned posters, gift for posters, steampunk posters, industry posters, hoist posters, sail posters, sailor posters, sailing posters, wood grain posters