CPC G02B 26/026 (2013.01) [B42D 25/29 (2014.10); B42D 25/36 (2014.10); B42D 25/405 (2014.10); B82B 1/003 (2013.01); B82Y 20/00 (2013.01); G02B 1/005 (2013.01); G02F 1/0128 (2013.01); G06Q 30/0185 (2013.01); G02B 2207/101 (2013.01); G02F 1/172 (2013.01); G02F 2201/38 (2013.01)] | 22 Claims |
1. A security device that exhibits at least one dynamic response upon change of orientation of the security device with respect to gravity, wherein:
the security device comprises a hollow capsule completely filled with a liquid and one or more microscopic elements; and
the dynamic response:
continues after cessation of the change of orientation with respect to gravity; and
comprises a transition of the one or more microscopic elements:
from substantial mechanical equilibrium to non-equilibrium upon action of the change of orientation with respect to gravity; and
back to substantial mechanical equilibrium after cessation of the change of orientation with respect to gravity, and
wherein the one or more microscopic elements undergo at least one of a rotational motion and a translational motion relative to the liquid during the transition.
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