I reccomend Syd Hoare's "A-Z of Judo" for anyone who has an interest in this sort of stuff. It details all the techniques ever acribed to JUdo including the techniques which were removed from competition. It includes descriptions and photos of neck cranks, spine locks, ankle/leg locks, gi chokes using the belt, wrist locks, all the good stuff that BJJ took over.
also...
According to Contest Judo, by Roy Inman (1987), the Dai Nippon Butokukai, under the direction of Jigoro Kano, banned locks of the fingers, toes, wrists and ankles in jujutsu/judo contests in 1899. In 1916, ashi garami (knee entanglement, twisting knee lock), and dojime (trunk/kidney squeeze, performed from a body scissors) were banned by the Kodokan. Apparently, there were a number of serious injuries which resulted from the use of these techniques. Joint lock attacks in Judo contests were limited to the elbow only in 1925. Over the years other rules have been created to insure the safety of contestants. Until the 1970's, the rules awarded ippon for lifting an opponent who is lying on his back to a height of your shoulders. This rule was later dropped to avoid the possibility of dropping a contestant from such a height. Another safety rule adopted was the banning of kani basami (flying scissors) after Yasuhiro Yamashita received a broken ankle from the technique endangering his entry in the 1984 Los Angeles Olympic Games (where he won the gold medal).
