Limited spring and inertia latch system

A hinge fitting for a vehicle having a forward tiltable back rest comprising a first hinge member pivotally attachable to a lower seat member for accommodating forward back rest tilting, a second hinge member attachable to a back rest member and pivotally attached to said first hinge member in substantially spaced relation to said first hinge member's seat pivotal connection with adjustable means to accommodate back rest adjustment to a reclined or otherwise adjusted position, means for limiting backward pivoting of said first hinge member at the occupant's seated position, inertia responsive latch means for preventing forward pivoting of said first hinge member upon sudden vehicle deceleration, means for releasing said latch means responsive to initial forward pivoting of said first hinge member in the absence of sudden vehicle deceleration, and means for restricting latch release action of said last means to a limited operating range of back rest adjustment excluding extremities of adjustment where the back rest approaches alignment with said forward back rest tilting and adjustment pivotal connections.