Scissors Jack
Scissors Jack General Information About Scissors Jack A scissor jack is a type of device that helps to gradually raise a vehicle off of the ground. It is called a scissor jack because it consists of diagonal metal pieces that expand or contract in a manner resembling a pair of scissors. Scissor car jacks usually use mechanical advantage to allow a human to lift a vehicle by manual force alone. There is an also e lectrically operated car scissor jacks that are powered by 12 volt electricity supplied directly from the car's cigarette lighter receptacle . The electrical energy is used to power these car jacks to raise and lower automatically. Electric jacks require less effort from the motorist for operation. If we briefly talk about the history of jack, the original scissor jack design dates back to 1908, was updated in 1913 from an original design know as a Lazy-Tongs mechanism by Edgard Cremieu-Javal, and then again in 1920 by Joseph(Jack) Lafrance. ...