Push-button (switch)
A switch in which the moving parts have only one position of rest, usually operated by the force of the finger or palm of the hand, and having stored energy (e.g. spring) return.
Note: Recently developed devices called touch-buttons employ various processes (mechanical, electric, etc) to operate a switch by simple finger contact without significant force.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
