Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Reexamination Certificate
2005-08-02
2005-08-02
Dinkins, Anthony (Department: 2831)
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
C361S152000, C361S156000
Reexamination Certificate
active
06924965
ABSTRACT:
An electromagnetically operated device has an electromagnet including a magnetic guide having a movable armature and at least one air gap, a magnetizing coil provided on the magnetic guide, the magnetic guide having at least a part formed as an insert of a magnetically hard material, the magnetic guide having an immovable part formed as a cylinder, the movable armature being provided with a cover of the cylinder, the magnetizing coil being located inside the cylinder coaxially to the latter, a rod extending along an axis of the cylinder, located in an inner hollow of the cylinder, and having a part of composed of a electromagnetically soft material, the armature being formed so as to close the magnetic guide with formation of a three dimensional closed structure including the cylinder, the cover, the rod with a possibility of providing a holding force which is equal to a pulling force formed by a winding of the magnetizing coil during a supply of a short-term current pulse to the winding of the magnetizing coil and demagnetization of a material of the rod.
REFERENCES:
patent: 4243964 (1981-01-01), Bogner et al.
patent: 4683452 (1987-07-01), Henley
patent: 4826082 (1989-05-01), Greiner et al.
patent: 5820032 (1998-10-01), Reiter
Dinkins Anthony
Magnasource, LLC
Zborovsky I.
LandOfFree
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