Editing ITT discrete snap-action (section)

==Description==
The design is reminiscent of [[Fujitsu Leaf Spring]]. The slider bears down on a leaf spring that serves as both the actuator leaf and the return spring, The patent notes that the "[use] of coil springs (which are awkward to handle and tend to tangle during assembly operations) is avoided, and the need for a separate keystem return spring is eliminated." (The term [[keystem]] in the patent refers to the [[slider]].)

The switch terminals are twist-locked in place using a 45° turn. The snap action spring is held in place by one terminal, and makes contact with the top of the other terminal.

The patent gives total travel of 0.160 in (4 mm) and 0.06 (1.5 mm) of overtravel. Actuation force is 75 grams, and preload is 30 grams. The snap-action spring containing the switch contacts is closed at 125 grams, but mechanical advantage is used to reduce the force required from the operator.

The tactile peak provides—according to the patent—a 5 to 10 gram reduction in force.