Rotary latch lock

A latching means resistant to accidental opening such as caused by vibration of the means on which the latching means is mounted, said latching means comprising a slide-bolt, actuator means extending outwardly from said slide-bolt, guide means supporting said slide-bolt for axial movement between an extended or locking position and a retracted or unlocked position, a rotary latch lock means mounted on said actuator means for movement along a path of movement therewith, means mounting said rotary latch lock on said actuator means for rotation about an axis perpendicular to the axis of said slide-bolt, a fixed stop lug mounted in the path of movement of said rotary latch lock, compressible vibration damping means clampingly engaged between said actuator means and said rotary latch lock for resisting rotation of said latch lock for holding said rotary latch lock in any rotary position of adjustment notwithstanding the vibrations of the means on which the latching means is mounted while permitting manual rotary adjustment of said rotary latch lock to another position of rotational adjustment, said rotary latch lock including a first peripheral surface comprising a portion of a cylinder and a second peripheral surface portion in a chordal plane with respect to said portion of a cylinder positioned radially inwardly from said first peripheral surface so that positioning of said second peripheral surface portion in facing relation to said stop lug enables said slide-bolt to move to its retracted position while positioning of said first peripheral surface in facing relation to said stop lug when said slide-bolt is in said locking position results in engagement of said first peripheral surface with said stop lug to prevent movement of said slide-bolt toward said unlocked position wherein said stop lug is mounted on support means comprising a U-shaped bracket plate fastened to and extending outwardly from means on which said guide means supporting said slide-bolt is mounted with said U-shaped bracket plate including a spanner portion extending transversely across and spaced outwardly from said slide-bolt, said stop lug extending outwardly from said spanner portion, said second peripheral surface of said rotary latch lock comprising the bottom of a generally rectangular slot extending inwardly from said first peripheral surface and dimensioned to matingly fit over said stop lug when aligned therewith.