Double cylinder sliding door lock

A locking mechanism for a door which comprises:

• a locking member for securing an associated door in a closed position, said locking member being arcuate;
• means for mounting said locking member to permit rotation about an axis;
• a first lock extending in a first direction, said first lock operatively cooperating with said locking member;
• a second lock extending in a second direction which is opposite to said first direction, said second lock operatively cooperating with said locking member;
• means for transferring rotary movement of one of said locks to said locking member;
• said means for transferring motion comprising a shaft extending intermediate said first and second lock, and further including at least a collar cooperating with said shaft in a manner which prevents relative angular motion between said collar and said shaft, a second collar cooperating with said shaft, said second collar including means cooperating with said shaft to prevent relative angular motion therebetween;
• and
• at least one spring biased member having an axis and at least one planar surface extending radially of the axis and bearing on the peripheral surfaces of the collars in at least some angular positions of the collars.