Electric knife

The device consists of two serrated blades that are clipped together.

When the appliance is switched on, the blades continuously move lengthways to provide the sawing action.

[citation needed] The invention of the electric knife is usually attributed to Jerome L. Murray,[1][2] but there are other claimants, such as Clem E. Kosterman, who filed a patent in 1939.

They are also sometimes used for other purposes, including sculpting polyurethane foam rubber,[5][6] cutting wood, cutting metal, and other solid or semi-solid substances and materials.

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