FIELD: physics.
SUBSTANCE: protective device exhibits at least one dynamic response to acceleration or change of orientation relative to gravitation, besides, dynamic reaction continues after termination of acceleration or change of orientation. Besides, the dynamic reaction can be optical, so that it is visible to the naked human eye. Alternatively, the reaction can be machine-readable. In some cases, the dynamic reaction has a duration of about 0.01 s to about 100 s, or about 1 s to about 10 s.
EFFECT: disclosed is a dynamic protection device.
23 cl, 18 dwg
