Noun
rolamite (plural rolamites)
A simple machine consisting of a stressed metal band and counter-rotating rollers within an enclosure, used in low-friction bearings etc.
A rolamite is a mechanical device, consisting of a roller suspended within a tensioned band. Source: Internet
Before MEMS, the primary system used to deploy airbags was called a " rolamite ". Source: Internet
The rolamite, and similar macro-mechanical devices were used in airbags until the mid-1990s when they were universally replaced with MEMS. Source: Internet