Importance

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Abstract

An autosecuring solenoid utilizes an interposing device that restrains the solenoid plunger when the solenoid is de-energized and/or energized, effectively preventing undesired movement of the plunger. When a voltage is applied across the coil, the flowing current creates an magnetic field. This field causes the plunger to slide within the solenoid cavity, unless restrained. This field also causes displacement of a movable magnet in the interposing device. The direction of motion of the movable magnet will depend on the magnetic field orientation of the movable magnet with respect to the magnetic field. Thus, the interposing device may move either toward or away from the plunger. Additionally, if using two interposing devices, one device could move away from the plunger and the second device could move toward the plunger. The second interposing device could even permit the plunger to move until the second interposing device engaged a recess or notch in the plunger. The first and/or second interposing devices may be restored by attraction between the movable magnet and the plunger or top of the interposing housing when the solenoid is de-energized. Alternatively, a second small magnet, spring, or other device in the housing of the interposing device returns the movable magnet to its desired position when the solenoid is de-energized.

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First Claim