Patent ID: 7770947

Claim:
An electromagnetic lock comprising: a body for mounting in a door jamb, said body combined with a retaining frame by using locking studs and retaining screws; one side of the retaining frame being installed with a trigger receiving box at a position with respect to a magnet; and an absorption plate for mounting in a door, said absorption plate combined to a supporting frame; two metal rings being installed in the absorption plate; the absorption plate having locking screws for locking the metal rings to the absorption plate; and wherein in installation, for aligning the body and the absorption plate, adjusting screws are installed between the absorption plate and the supporting frame; and wherein the supporting frame has screw holes for receiving the adjusting screws; one side of the supporting frame has two magnetic holes for receiving magnets; a magnet protection sheet are installed at lower side of the magnets; and a small screw serves to lock the protection sheet to the supporting frame; wherein said body and said absorption plate are capable of being locked together by magnetic attraction.