Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate
2007-11-13
2007-11-13
Goins, Davetta W. (Department: 2612)
Communications: electrical
Condition responsive indicating system
With particular coupling link
C340S551000, C340S561000, C340S565000, C340S567000, C324S228000, C324S260000, C324S301000
Reexamination Certificate
active
11063657
ABSTRACT:
A ferromagnetic detection pillar having one or more applied magnetic field sources and one or more magnetic field sensors, with the magnets and sensors arranged and adapted to detect a ferromagnetic threat object on one side of the pillar. A detection device, such as a motion detector or infrared detector, is also provided, to detect the presence of an object on a selected side of the pillar. A single free-standing pillar can be used, or two or more free-standing pillars can be arranged to constitute a variable aperture detection portal. Single sensors or multiple-sensor configurations can be used.
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Jeffers Frederick J.
Massengill R. Kemp
McClure Richard J.
Goins Davetta W.
MedNovus, Inc.
Spinks Gerald W.
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