Abstract: A motor vehicle seat is guided, as is customary, with its upper tracks in lower tracks and is manually adjustable and lockable into selected longitudinally spaced seat positions. In addition to these seat position locking means, the seat is provided with at least one deceleration activated locking device which, under conditions of relatively high deceleration, will effect form-locking engagement between the upper track and the lower track.

Abstract: A motor vehicle seat has a pair of upper track members attached thereto which serve to guide the seat for sliding movement in a pair of stationary lower track members. On that upper track member on which the belt lock is located, a shackle secured to the upper track member is completely embracing the lower track member.A pawl, which is attached on the shackle, is adapted to extend through apertures in the shackle and engage with apertures provided in the lower track member. This arrangement will, on the one hand, enable the belt lock to be directly coupled with the lower track member and, on the other hand, permit the shackle through its pawl to lock the motor vehicle seat on the lower track member in selected positions.