Abstract: A seat belt buckle has a plastic outer body of a color and style suitable for the intended environment, with a formed steel inner frame having horizontally-spaced upturned sides having two parallel pairs of inturned flanges serving as crush inhibitors, release slide guides, and tongue receiver guides. An upturned frame front flange cooperates with the sides and flanges as a wrack resistor and tongue retainer. The body front has a trough-shaped entrance to admit a latchable tongue, one margin of the entrance being provided by the sloped front of an end-release operating slide. A removable slide front button is curved to assist finding for release. A pivoting latching pawl is spring-urged into latching position, and released by a cam on the slide, with a shallow ramp for ease of intentional release. A tongue ejector holds the pawl in unlatched position when the tongue is out of the buckle.

Abstract: An automatic belt retractor mounted within a boot having belt retraction locking means mounted within the boot to lockingly but releasably engage the belt to counterbalance the spring bias retraction of the retractor spool. The belt locking means includes a base member with a tongue disposed toward the belt and a moveable member slideably received by the base member also with a tongue disposed toward the belt, the belt being disposed between the base and moveable members. Such members define a belt locking position when their respective tongues are aligned to arrest the belt therebetween, preventing the retractor from cinching up the belt upon repeated momentary loosenings of the tension upon the belt. Concurrently, such moveable member's rigid rod engages the retractor's rotatable cam plate and is operable to rotate such cam plate manually to lock the retractor during all times when the belt locking means are engaged.