| 摘要 |
<p>The present invention is in a first part is a door security system comprising an elongate J-frame to attach to a door-frame having a recessed groove defined within a first vertical piece. The J-frame snugly nestles within, and extends entirely along said groove. An elongate vertical member attaches to a door first vertical surface to entirely cover same and traverse at least the door thickness. The vertical member mates with the J-frame, to prevent unwanted force entry. In a second part the invention comprises an elongate U-frame to attach to a door having a recessed groove defined within a second vertical surface. The U-frame snugly nestles within and extends entirely along the recessed groove. An elongate T-frame attaches to, and extends axially entirely along, a second vertical door-frame piece. The T-frame mates with the U-frame to prevent the door from being removed from its frame.</p> |
