932,083. Latches. GENERAL MOTORS CORPORATION. May 17, 1962 [May 22, 1961], No. 19045/62. Class 44. A door latch 22 comprises a rotary bolt 50, a pivoted detent lever 56 engageable with ratchet teeth 54 to prevent rotation of the bolt in the unlatch direction, and a release lever 80 which is pivotally movable in one direction to contact the detent lever 56 and rotate it in boltfreeing direction and is pivotally movable in the other direction to engage the ratchet teeth 54 and prevent rotation of the bolt 50 in the unlatch direction. As shown, bolt 50 is a gearwheel the teeth of which act also as the ratchet teeth, and the detent and release levers are pivoted about a common fulcrum 58. The detent lever 56 is releasable from engagement with the ratchet teeth by a push-buttonoperated rod 30 and by a remote handleoperated bell-crank lever 68, movement of which in one direction about a pivot 70 causes a tab 84 on the lever 80 to free the lever 56 from the ratchet teeth 54 and movement of which in the other direction causes a tooth 82 on the lever 80 to engage the ratchet teeth and so lock the bolt against release by the push button. The push button incorporates a self-operated cylinder lock.