Historical information

A block and tackle is a simple but highly effective lifting device, thought to have been invented by Archimedes. These systems were used extensively for construction in the ancient world, and continue to be used today for various applications, especially at sea, where non-motorized lifting systems are highly useful. A basic block and tackle includes a single fixed pulley or block, and at least one additional pulley, linked with rope, to form a complete set. Depending on the size of the load being lifted, additional sets may be used to further distribute the weight.

Significance

A mid-twentieth example of a wooden block that shows advances in the design of the marine block compared to late 19th century blocks, with hook and pin and its compliance plate meeting the marine standards of the time.

Physical description

Block, three-sheave rope block, wooden with metal sheaves. Metal ring and connecting tab, painted blue-grey. A brass compliance plate is on one cheek. One one side there are eight nails.