Electricity: measuring and testing – Conductor identification or location – Inaccessible
Reexamination Certificate
2011-07-19
2011-07-19
Nguyen, Ha Tran T (Department: 2858)
Electricity: measuring and testing
Conductor identification or location
Inaccessible
C324S519000, C324S658000, C324S686000
Reexamination Certificate
active
07982450
ABSTRACT:
A handheld device providing an internal view through an obscuring wall or other obscuring surfaces of hidden structural or facilities elements (such as wooden studs, electrical, plumbing, or HVAC), or the absence thereof. A continuous and homogeneous luminescent gas or other visual display material whose optical characteristics change as a result of the applied electric field is used both to simultaneously detect capacitance changes associated with hidden objects and to display those detected those objects. Different types of chambers are disclosed for the gas as well as means to prevent fringing effects. The gas is held just at its ionization level at which point it becomes optically visible. Circuitry is disclosed for controlling the energy source based on current draw or light output of the gas and feedback circuitry is disclosed to neutralize the effects of ambient light. Also disclosed is a device and method for the detection and mapping of electric fields.
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Chan Emily Y
Fulwider Patton LLP
Nguyen Ha Tran T
Runk Thomas A.
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