Overhead hand operated door lock

Claim 1

A hand operated door locking device intended for use with a sliding overhead type door of the type commonly found on garages and the like, the door being slidable between an open horizontal position and a closed vertical position relative to a door frame defining a door opening, the door having a front surface facing the door openIng, a rear surface, a top edge, and a bottom edge, the lock comprising: bracket means adapted for mounting on the door frame above the top edge of the vertically closed door and projecting horizontally outwardly therefrom in a manner to overlap the thickness of the door; a locking plate removably mounted on the bracket means adapted to project therefrom to a position adjacent the top edge portion of the back surface of the vertically closed door in the normal door trajectory when being opened in a manner to engage the top edge of the door upon any attempt to slide the door upwardly to its open horizontal position so as to prevent the opening of the door; the bracket means comprising a first U-shaped member including a body portion and two spaced apart parallelly extending leg portions extending outwardly in the same direction from opposed ends of the body portion; a second U-shaped member having a body portion disposed parallel to the body portion of the first member and having a pair of parallel spaced apart leg portions extending outwardly from respective top and bottom ends of the body portion in planes parallel to each other; a series of openings spaced along the pair of leg portions of the first member with respective openings in each leg portion being in axial alignment with each other, the axis of the openings being substantially parallel to the axis of the first member body portion; a series of spaced apart openings extending along the pair of leg portions of the second member with each of the respective openings in each leg portion being in axial alignment with each other and with the axis of the openings extending substantially parallel to the axis of the second member body portion; the first member leg portions adapted to be placed in juxtaposition with the respective second member leg portions and to be telescoped relative thereto in an adjustable manner with the selected telescope position of the respective first and second members being retained by the alignment of respective openings in the different leg portions and axially inserting bolts through the respective aligned openings to secure the first and second members in the adjusted telescoped positions; the outermost surface of the second member body portion being provided with a pair of spaced apart pins projecting outwardly therefrom in a perpendicular manner thereto adapted for removable engagement with the locking plate, each pin projecting a distance slightly greater than the thickness of the associated locking plate, with each pin provided with an enlarged head portion thereon for utilization in retaining the locking plate in proper position on the bracket means; and the locking plate is of an elongated rectangular configuration, the top portion of the locking plate provided with a pair of spaced apart L-shaped slots therein, the spacing between the Lshaped slots being substantially identical to the spacing between the pin projections on the second member body portion, each slot having a leg portion extending longitudinally of the locking plate with the bottom end of each leg portion connected to a foot portion of the slot which extends substantially perpendicular to the respective leg portion and opens out of one edge of the locking plate, the width of the foot and leg portions of each of the slots being slightly greater than the diameter of the pin projections and less than the diameter of the enlarged pin heads whereby the slots may be slidingly engaged onto the respective projecting pins and locked thereon in the leg portions of the slots for removable connection of the locking plate to the bracket means with the bottom end portion of the locking plate extending into the plane of opening and closing travel of the door in a manner to block the path of travel of the door and prevent opening of the same until after the locking plate is removed from the bracket.