124 when the handle 122 is turned the lower cam spindle 128 is rotated to rotate the lower cam 123 and the upper cam 124 which is biased to engage the lower cam 123 locking means is provided shown comprising the locking member 160 which extends radially outwardly from the insert member 115 while the locking member 160 is shown extending outward on one side it will be evident that while not shown the locking member can also be provided to extend on diametrically opposite sides of the insert member 115 to secure the latch 110 from being opened or to prevent it from being locked preferably the locking member 160 can be retracted with a key 119 to lock the latch 110 against further actuation a locking cam shown comprising an eccentric member 162 is disposed in the insert member 115 the eccentric member 162 is keyed to rotate with the tab 163 of the lock plug 118 and engages the locking member 160 a cam slot 164 is provided extending through the upper cam 124 and a housing slot 165 is also provided in the outer housing 113 the lock plug 118 is turned with the key 119 to extend the locking member 160 outwardly through the cam slot 164 and into the outer housing slot 165 as shown in fig3 in this position the locking member 160 secures the assembly and prevents opening of the latch 110 similarly the unlocking of.