Switchblade This is a type of “automatic knife” that reveals a blade from the handle via a spring. As it stands, you cannot have a knife that automatically exposes the blade via button or switch.

Knobs, toggles and push buttons are coming on strong to give cars a more high-tech feel in their controls. Examples: • Lincoln.

People will live in houses so automatic that push-buttons will be replaced by fingertip and even voice controls. Some people today can push a button to close a window – another to start coffee ...