Automatic jamb latch mechanism for overhead bifold door

A latch mechanism for use with and attachable to an overhead bifold door movable between open and closed positions over a doorway, the doorway having a first door jamb and a second door jamb and the overhead bifold door having a first door panel and a second door panel hingedly attached to each other, the latch mechanism comprising:

• a latch arm assembly, including a movable latch arm and biasing means, attachable to the first door panel of the overhead bifold door adjacent the first door jamb of the doorway, said latch arm assembly having a first, latched position and a second, unlatched position of said latch arm, said latch arm assembly further comprising:
• a base member mounted on the first door panel of the overhead bifold door;
• a pivot member attachable to said base member;
• a hook member attachable to said pivot member;
• and
• a rocker arm attachable to said pivot member and said hook member;
• a latch member attachable to the first door jamb, and positioned for selective, cooperative engagement with said latch arm;
• actuation means attachable to the first door panel of the overhead bifold door for operative activation of said latch arm assembly between said latched and unlatched positions and for moving said latch arm into latching relation to said latch member;
• connecting means linking said actuation means and said latch arm assembly;
• a power source for driving the latch mechanism;
• and
• power transmission means between said power source and said actuation means.