Abstract: A magnetic tape cassette that includes a substantially rectangular housing and a pair of tape reels carried for rotation within the housing with a length of magnetic tape extending between the reels for recording and/or playback of information. An aperture in a sidewall of the housing affords external access to the tape by recording/playback apparatus, and posts within the housing guide the magnetic tape between the reels adjacent to the sidewall aperture. The guideposts are mounted with the housing so as to be disposed entirely internally of the tape between the reels such that the information surface of the tape is free of contact with the guideposts or any other portion of the cassette as the tape is wound between the reels past the sidewall aperture.

Abstract: A punch type release lock intended for use primarily in retaining load supports such as pallets in locked position in an aircraft. The lock comprises a detent mechanism which is inserted into a recess preferably at the side of the load support. A preferred form of detent mechanism comprises a pair of relatively movable elements, at least one of which is pivoted. The elements include abutments which are movable apart as the elements are inserted into the recess. When a load is applied to the pivoted detent, as for example, by a parachute extracting system, movement of the element in a direction to withdraw the element to release the load support is prevented by a load cell comprising a fuse plate and punch, in which the punch is prevented from movement by the fuse plate until attainment of a predetermined load on the pivoted detent element.