| 摘要 |
<p>An electromagnetic door lock assembly employs an electromagnet (10) position ed in a frame adjacent to a door, and an ad- justable armature assembly positioned in the door for interaction with the electromagnet. The armature assembly (24) includes an armature plate (28) having a pair of shear low-cost, replaceable elements th at initially engage the electromagnet (10). A backing plate (46) is situated adjacent to the armature plate, and a stem coupling t he backing plate to the armature plate includes a spring biasing the backing plate (46) and armature plate (28) toward each other. A mounting portion for mounting the armature assem- bly (24) to a door to be locked is provided with adjusting screws for adjustably positioning the backing plate at a fixed position with respect to the mounting portion so that the armature plate (28) is positioned at a first position for optimum interaction with the electromagnet (10), the screws having elongated heads for maintaining th e relative alignment between the armature plate (28) and the mounting portion as the armature plate moves between the first position and a position contiguous to the electromagnet (10).</p> |
