Electromagnetic lock device
 An electromagnetic lock device includes a latch slidably received in a housing, and a follower rotatably secured in the housing and having an arm engaged with the latch and having one or more pegs. A spindle is slidably engaged in and actuated by the coil and coupled to either of the pegs by a link for rotating the follower in either of the directions to actuate the latch. The latch may be prevented from rotating relative to the housing. A casing is secured in the housing for receiving the coil. A spring may be used to bias the spindle toward the follower. 
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Chih Chung
Chang