Dead bolt cable lock

A dead bolt cable locking apparatus comprising a closure element, a cable loop on the closure element, guide and support means for the cable loop on the closure element, a plurality of dead bolts directly attached to the cable loop at spaced points thereon and being movable on linear paths toward and from locking positions with the portions of the cable loop to which the dead bolts are attached, guide means for the dead bolts on the closure element, and drive means for the cable loop on the closure element whereby the cable loop may be moved in opposite directions on said cable loop guide and support means, said cable loop being substantially a rectangular loop having straight stretches, one dead bolt being attached to each stretch of the cable loop in parallel relation thereto and moving in a linear path with such stretch and being disposed at right angles to the next adjacent dead bolts of said apparatus, and said guide and support means for said rectangular loop comprising a pulley at each corner region of the rectangular loop, said drive means for the cable loop comprising a rotary crank element on said closure element having a driving connection with said cable loop between a pair of said pulleys and said driving connection comprising a pair of spaced terminal elements on said cable loop and a forked extension on said crank element engaging between said terminal elements to move them with said cable loop.