Knob latch

A door latch, comprising in combination:

• a first case adapted to be mounted to one side of a door,
• a second case adapted to be mounted to the other side of said door at a location opposite to said first case,
• a first latch handle rotatably mounted in said first case and having a strike engagable latch surface thereon,
• a second latch handle rotatably mounted in said second case,
• an operating shaft having a first end non-rotatably connected to said second handle and having a second end,
• locking means slidably mounted to one of said cases for movement between a locking position which prevents rotation of said shaft and an unlocking position which permits rotation of said shaft,
• said locking means having a cam surface thereon,
• a keylock spindle concentric with said operating shaft,
• said spindle having an integrally-formed T-shaped end portion,
• a cam operator surface means on said end portion for moving said locking means from said locking position to said unlocking position in response to rotation of said spindle,
• key operated means rotatably carried by said second latch handle and non-rotatably connected to said spindle for rotating said spindle to unlock said latch,
• a locking ring within said first case non-rotatably connected to said first handle, said locking ring having a pair of diametrically opposed holes provided therein,
• said T-shaped end portion of said spindle disposed between said second end of said operating shaft and said locking ring,
• a pair of pins integral with said operating shaft in mutual parallel relationship therewith and extending into said holes of said locking ring, and
• said cam operator surface means being disposed radially outward from the circle defined by the path of rotation of said pins,
• whereby when said latch is assembled to a door said pins and holes cooperate to prevent relative rotation between said second handle and said first handle.