The hydraulic crane was invented by Sir William Armstrong in 1846, primarily for use at the Tyneside docks for loading cargo. These quickly supplanted the earlier steam driven elevators: exploiting Pascal's law, they provided a much greater force. A water pump supplied a variable level of water pressure to a plunger encased inside a vertical cylinder, allowing the level of the platform (carrying a heavy load) to be raised and lowered. Counterweights and balances were also used to increase the lifting power of the apparatus. COUNT 5
QSN1 Who invented the hydraulic crane in 1846? ANS1 Sir William Armstrong QSN2 Were was the hydraulic crane initially used? ANS2 Tyneside docks QSN3 In what manner did hydraulic cranes employ Pascal's law?  ANS3 they provided a much greater force QSN4 The water pump supplied water pressure to a plunger located where? ANS4 encased inside a vertical cylinder QSN5 besides water pressure, what else was used to increase the lifting power? ANS5 Counterweights and balances