inertia switch

inertia switch

[i′nər·shə ‚swich]
(electricity)
A switch that is actuated by an abrupt change in the velocity of the item on which it is mounted.

inertia switch

An electrical switch that is actuated by the sudden acceleration of an aircraft. Inertia switches are used in emergency locator transmitters, which get activated when the aircraft decelerates rapidly during crash landings.
References in periodicals archive ?
In addition, there are features like the inertia switch and an auto engine immobilizer.
Some manufacturers use an inertia switch or valve,(16) while others use electronic switches.
General Motors obtained a patent for an inertia switch in 1973 but has never used it in its domestic vehicles.
The increasing emphasis by automakers on crash-worthiness and occupant protection is largely responsible for Americans' confidence in their vehicles, according to Richard Brown, vice president of First Inertia Switch Ltd.