Multipoint lock assembly for a sliding door

A door lock assembly for use in locking a sliding door, said lock assembly comprising;

• a plurality of latch cartridges for mounting along a free side edge of a sliding door, each of said latch cartridges defining a vertically extending keyhole latch port with a wider first portion and a narrower second portion;
• means for movably supporting said latch cartridges at vertically spaced positions along the door free side edge for vertical movement between a latched position and an unlatched position;
• spring means for urging said latch cartridges normally toward said latched position;
• trigger means for releasibly retaining said latch cartridges in said unlatched position;
• a plurality of latch pins for mounting onto a door jamb adjacent the door free side edge, each of said latch pins including a narrow shank projecting from the door jamb and terminating in a wider head, said latch pins being mounted on the door jamb at vertically spaced positions for reception of said latch pin heads respectively through the wider first portions of said latch ports when the door is closed with said latch cartridges in the unlatched position, at least one of said latch pins thereupon engaging said trigger means to release said latch cartridges for spring-loaded movement to the latched position with said latch pin heads disposed behind the narrower second portions of said latch ports to prevent door opening;
• and
• actuator means for displacing said latch cartridges from the latched position to the unlatched position to align said latch pins with the wider first portions of said latch ports and permit door opening, said trigger means being cocked upon movement of said latch cartridges to the unlatched position to releasibly retain said latch cartridges in the unlatched position.