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Screw Jacks And Trucks Of World War II Era

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LITERATURE REVIEW Mechanical type screw jacks were very general for jeeps and trucks of World War II era. For instance, the World War II jeeps (Willys MB and Ford GPW) were made the "Jack, Automobile, Screw type, Capacity 1 1/2 ton", armaments part number 41-J-66. These jacks, and related jacks for trucks, were functioned by using the lug twist as a lever for the jack's ratchet act top of the jack. The 41-J-66 jack was accepted in the jeep's tool section. Screw type jack's persistent in use for little capacity needs due to low cost of construction raise or lower it. A manage tab is distinct up/down and its location determines the course of movement and approximately no maintenance. The merits of using a screw as a mechanism, essentially an …show more content…

Leonardo’s plan used a threaded worm device, handled by bearings, that turned by the rotation of a worm tube to drive a raising screw to shift the weight, this principle is same as we use today. We cannot be certain of the planned application of his creation, but it appears to have been confined to the history notes, beside with the helicopter and tank, for approximately four centuries. It is not pending the late 1800s that we have proof of the product being evolved further. With the engineering revolution of the delayed 18th and 19th centuries comes the first employ of screws in machine tools, via British inventors such as John Wilkinson and Henry Maudsley. The most noteworthy inventor in mechanical trade from the early 1800s was unquestionably the mechanical mastermind Joseph Whitworth, who identified the need for exactness, had become as significant in industry as the stipulation of …show more content…

Enthused young engineers started to put Whitworth‟s machine equipment to new uses. During the beginning of 1880s in Coaticook, a small city near Quebec, a 24-year-old creator named Frank Henry Sleeper planned a lifting jack. Like da Vinci‟s jack, it was a scientific innovation since it was based on the rule of the ball bearing for following a load and converting rotary action, via gearing and a screw, interested in linear motion for transferring the load. The device was resourceful, reliable and easy to work. It was made in the construction of bridges, but mainly by the railroad business, where it was capable to lift locomotives and rail lines

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