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-motorised 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.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.Two sheave rope block; two metal sheaves in polished wooden block with a metal inner pin with a ring on top and a bucket on the bottom. Rectangle carved into one cheek with inscriptions on the attached compliance plate with inscriptions. Stamped within a lozenge: "2 ↑ CS"flagstaff hill museum, flagstaff hill village, shipwreck coast, flagstaff hill, block & tackle, rope, lifting heavy weights, ship rigging, cargo lifiting, two sheave block, compliance plate, marine technology

A sailing or rope block has single or multiple pulleys with one or more sheaves enclosed in an assembly between cheeks or chocks. In use, a block is fixed to the end of the line, spar or load to be lifted such as at a transport dock. A rope line is reeved through the sheaves, and through one or more matching blocks at the far end, to make up what's known as a tackle. Generally, the more sheaves in the blocks that make up a tackle, the higher its mechanical advantage. Various types of blocks are used in sailing. Some blocks are used to increase mechanical advantage and others to change the direction of a line. A ratchet block turns freely when a line is pulled in one direction but does not turn in the other direction, although the line may slip past the sheave. This kind of block makes a loaded line easier to hold by hand.This rope block is an example of rope and tackle systems used in maritime settings to lift and move cargo and machinery, often with the help of a crane. It is also used on sailing vessels as part of the rigging, help to raise and lower the ropes and sails.Block; two sheave wooden rope block with ring and becket. It features a Closed Spelter Socket (CSS). Rings are galvanised metal. There is a compliance plate attached with an inscription. It was once owned by a government body, as indicated by the 'up-arrow" symbol.Compliance plate: stamped twice "CS" [Closed Spelter] and "↑"flagstaff hill, warrnambool, shipwreck coast, flagstaff hill maritime museum, flagstaff hill maritime village, lifting equipment, stevedoring, rope block, rigging block, sailing equipment, css, closed spelter socket

"Pioneer" chainsaw with green housing. Pull start, no chain. Compliance plate on back (see Below) second plate on top.Compliance plate on back "Pioneer Saws / Model / 450 / Serial No. A10778 / Division of Outboard Marine Australia Pty. Ltd. / Bankstown NSW". Cast in relief on side "Pioneer & Pine Trees".machinery, wood cutting

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 a variety of 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.This wooden two-sheave block is part of a ship's rigging. Its an example of rigging equipment in use from the early-to-mid 20th century and an example of the evolution of rigging equipment since the 17th century.Block; two sheave wooden tackle block with metal rollers and a large metal hook. It has a compliance plate on the side with an inscription. Stamped inside a lozenge; "2 ↑ CS" flagstaff hill museum, flagstaff hill village, shipwreck coast, flagstaff hill, block & tackle, rope, lifting heavy weights, ship rigging, cargo lifiting, rope block, marine technology, ship equipment, rigging, two sheave block

3 sheave wood block with ring link. Rollers are metal. Compliance plate painted over, another metal plate 5 nails. flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, 3 sheave wood block, wood block, block

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.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.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. flagstaff hill museum, flagstaff hill village, shipwreck coast, flagstaff hill, block & tackle, rope, lifting heavy weights, ship rigging, cargo lifiting, marine technology, marine block, three sheave block