An antisoliton is a soliton with the negative amplitude of a given soliton.

bright soliton is a pulse like soliton observed in optical fibres. It has high stability and doesn't change during propagation. It is observed in the anomalous dipersion case(which is determined by the sign of dispersion term in NON LINEAR SCHRODINGER EQUATION).

An antikink is a negative 1-soliton solution to the Sine-Gordon equation.

If your car is a 1996 or newer, the retractor is usually a SWITCHABLE retractor - meaning that it can switch from the usual mode of locking only in an EMERGENCY, to a mode where it locks at all times - called the AUTOMATIC locking mode. Changing the belt from the EMERGENCY to AUTOMATIC locking modes is easy - simply pull the shoulder belt out all the way (do it slowly) - when you get to the very end, let the belt go back in. As it goes back in you will likely hear a ratcheting sound - and if you give a gentle pull you will notice that the belt is locked and it is not possible to make the belt any longer. In the automatic locking mode, the shoulder belt only gets shorter - it does not get longer (it will however go back to "normal" when you let the belt all the way back in).

http://thecarseatlady.wordpress.com/installation-tricks/lockingthebelt/

An autosoliton is a dissipative soliton - a wave caused by a non-linear effect, as present in several forms of physical systems.