Abstract: An anchoring device is disclosed herein having a track with a plurality of spaced-apart lock cut-out receptacles formed in an inverted T-groove insertably accepting a movable slider or car. The slider or car includes an eyelet member with a flange slideably carried in the T-groove and a spring-biased latch element having a circular stop normally biased into a lock position in a selected cut-out receptacle in the track. The latch is downwardly depressible against the spring bias to an unlock position with the track cut-out receptacle to permit movement of the slider along the track. Track sections are joined together by an expansion pin and slot construction.

Abstract: A tie-down apparatus is disclosed herein having a composite overlying double track on which a car is slideably carried on the topmost track and securement fasteners carried in the lowermost track secure the double track to a supporting rail or truck bed. The car includes a spring-biased plunger having an enlarged head adapted to ride in the uppermost track during positioning of the car along its linear length and to seat in a selected one of a plurality of notches in the rails of the uppermost track for releasably retaining the car in the selected location. The plunger mounts a rotatable ring latch having a first position bearing against the car to prevent displacement of the plunger head from the selected notch and a second position in alignment with lateral car recesses to permit displacement of the head from the selected notch against spring expansion pressure to free the car for sliding along the track.