INERTIA SWITCH Russian patent published in 2014 - IPC H01H35/14 

FIELD: measurement equipment.

SUBSTANCE: invention is aimed at recording of applied linear accelerations in automatic systems of aircrafts and safety systems of vehicles. An inertia switch comprises a casing, an axial guide, an inertia block with radial projections set on the guide, a drive for contacts, movable rotary bushes set coaxially in each other and in respect to the inertia block which are fitted by inclined grooves in the side walls for the interaction with radial projections of the inertia block at its translational motion. The inclined grooves are inclined to the opposite sides. Permanent magnets are installed on the one of the bushes, and the bushes are made from nonmagnetic metal with high electric conductivity.

EFFECT: improved reliability of inertia switch at the influence of highly intensive impact and vibration accelerations in flight and in case of emergency falls, keeping of the initial position of contacts within the unit where they are installed.

3 cl, 5 dwg