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US 5,516,166 AGranted
Electromagnetic lock
AssigneeHarrow Products, Inc.
InventorsGeorge A. Frolov, Peter S. Conklin
Life of this patent
Estimating the term…
Abstract
An electromagnetic lock employs a pre-wound bobbin which is forced onto the E-shaped lamination stack of a magnetic core. The housing is configured in two longitudinal sections which are relatively pivotal to provide access for circuitry within the housing for both an outswinging and an inswinging door lock installation. The electromagnet also employs a circuit to sense the power supply to the electromagnet and to automatically select the operating voltage of the electrical coil.
Claims17
An electromagnetic lock comprising:
- core means for forming an elongated magnetic core comprising a stack of generally E-shaped laminations including first and second legs and a middle leg disposed between said first and second legs, each leg terminating in a substantially rectangular frontal end portion, said legs further terminating in generally co-planar frontal edges;
- bobbin means for forming a bobbin having a face plate and slot means defining an elongated slot dimensioned to closely engage said middle leg so that said face plate extends in generally close abutting relationship between said first and middle leg end portions and between said second and middle leg end portions;
- coil means for forming an electrical coil, said coil being wound around said bobbin means;
- and
- housing means for housing said core means, bobbin means and coil means, said housing means comprising opening means for defining an opening, at least a part of said frontal end portions of said first, second and third legs being disposed in said opening, said opening defining a frame surrounding at least a part of said frontal end portions and overlying a closely adjacent portion of said face plate.
2 more elements
An electromagnetic lock comprising:
- first section means for forming an elongated first enclosure section having a first end portion thereof;
- second section means for forming an elongated second enclosure section, said second section having a second end portion and dimensioned to mate with said first section;
- pivot means for pivotally connecting said first and second sections at said first and second end portions so that said sections are relatively movable between a closed position wherein said enclosure sections mate to form an enclosure having an interior thereof and a pivoted open position to provide access to said enclosure interior, said second section means having a frontal portion;
- and
- electromagnetic means for forming an electromagnet comprising core means and coil means disposed about said core means, said electromagnetic means mounted in fixed relationship to said second section, said coil means being energizable to produce a magnetic field traversing exteriorly from said frontal portion.
2 more elements
An electromagnetic lock comprising:
- first section means for forming an elongated enclosure section comprising a generally U-shaped longitudinally extending member and having a first end portion thereof;
- second section means for forming an elongated second enclosure section dimensioned to mate with said first section to form a box-like enclosure and having a second end portion thereof;
- connector means for connecting said first and second sections at said first and second end portions so that said sections are relatively pivotally movable between a first closed position wherein said enclosure sections mate to form an enclosure having an interior thereof and a pivoted open position to provide access to said enclosure interior, said second section means having a frontal portion;
- and
- electromagnetic means for forming an electromagnet comprising core means and coil means disposed about said core means, said electromagnetic means mounted in fixed relationship to said second section, said coil means being energizable to produce a magnetic field traversing exteriorly from said frontal portion.
2 more elements
Dependencies are inferred from the claim text.