<P> A block which is open or can be opened to engage with a bight, without the necessity to thread the rope through the block . The snatch block is also the load lifting pulley in certain arrangements . </P> <Table> <Tr> <Td> </Td> <Td> This section needs expansion . You can help by adding to it . (September 2017) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs expansion . You can help by adding to it . (September 2017) </Td> </Tr>

Who invented the block and tackle pulley system