| 摘要 |
PCT No. PCT/GB95/02253 Sec. 371 Date May 24, 1996 Sec. 102(e) Date May 24, 1996 PCT Filed Sep. 22, 1995 PCT Pub. No. WO96/10122 PCT Pub. Date Apr. 4, 1996An electromagnetic locking device comprises an actuating assembly including an electromagnet having an operative face and at at least one side thereof an abutment which extends in a direction substantially perpendicular to the operative face and projects beyond the operative face, and a cooperative assembly including armature mounted for movement towards and away from the operative face in a direction substantially perpendicular thereto when the electromagnet and armature are aligned and arranged so as to engage behind the abutment when the electromagnet is energized. The actuating assembly also includes at least one plunger which is mounted for movement substantially perpendicularly to the operative face between a retracted position and an extended position relative to the operative face and spring washers for driving the plunger into its extended position into contact with said armature to displace the armature clear of said abutment when the electromagnet ceases to be energized. The plunger is provided adjacent to one side of the electromagnet, namely that at which the abutment is provided, and the armature is mounted on a pivot so as to allow the armature to move progressively onto the electromagnet across the width thereof as the electromagnet is energized.
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