Sliding door locking device

Apparatus for locking closed a sliding door panel, comprising:

• (a) a jamb-engaging stile which, when the panel is in a closed disposition, it is received within a channel defined by frame members comprising a jamb;
• (b) at least one locking boss received within the channel and recessed wherein, when the panel is in an open disposition, said boss does not protrude out of the channel beyond the frame members defining the jamb;
• (c) means, carried by the jamb-engaging stile, for capturing said locking boss when the panel is in a closed disposition to preclude opening lateral movement of the door panel;
• (d) wherein a service of said jamb-engaging stile facing the jamb has a recess formed therein and said locking boss has an expanded portion at a distal end thereof, said capturing means comprising:
• (i) a vertically-elongated first panel, having inner and outer surfaces, closing said recess, said first panel having an aperture, in alignment with said locking boss, formed therein through which said locking boss passes as the panel is moved to a closed disposition;
• (ii) a vertically-elongated second panel, having inner and outer surfaces, received within said recess and disposed generally with said outer surface thereof against said inner surface of said first panel for reciprocation between first and second positions, said second panel having an aperture formed therein, said aperture formed in said second panel including a widened portion, through which said expanded portion of said locking boss can pass, in registration with said aperture in said first panel when said second panel is in said first position thereof, and a narrowed portion, through which said expanded portion of said locking boss is precluded from passing, in registration with said aperture in said first panel when said second panel is in said second position thereof;
• and
• (iii) means for moving said second panel between said first and second positions thereof;
• (e) wherein said moving means comprises:
• (i) a tab extending from said inner surface of said second panel generally perpendicular thereto to define a plane generally parallel to an axis of elongation of said second panel, said tab mounting, generally transverse thereto, a dowel;
• (ii) an ear extending from said inner surface of said first panel generally perpendicular thereto to define a plane generally parallel to said plane defined by said tab;
• (iii) a cam mounted to said ear for rotation about an axis spaced from said inner surface of said second panel at a distance different than that at which said dowel is spaced from said inner surface of said second panel, said cam having a generally radially-extending slot formed therein, said dowel being received within said slot, wherein, as said cam is rotated, said dowel rides radially within said slot to drive said second panel longitudinally relative to said first panel;
• and
• (iv) means for effecting rotation of said cam.