| 摘要 |
A safety cable locking device for a knob-operated door mounted in a door frame including a framing stud. The device comprises an anchor member, a wire plastic covered cable, a lag bolt and a bushing. The anchor member contains the bushing and is fastened to a door frame framing stud by the lag bolt which passes through a hole in the anchor member and bushing into the framing stud. The cable ends pass the side of the anchor member through two holes which are located to cooperate with the bushing, causing the cable ends to be angled apart at 15 to 30 degrees. The cable loop is passed over the inside door knob. If the door is pushed open, tension force is put on the cable causing the edges of the anchor member holes to bite into the angled cable, locking the cable in place and preventing the door from being opened further.
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