Apparatus and method for locating objects behind a wall lining

Details Apparatus and method for locating objects behind a wall lining Apparatus and method for locating objects behind a wall lining

2005-05-17

2005-05-17

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S067000, C324S326000

Reexamination Certificate

active

06894508

ABSTRACT:
A device for locating an object behind a wall lining includes a housing having a front portion fitting substantially in the palm of a user's hand. Operating switches are located in juxtaposition to the grip portion so as to be operable by the user without substantially altering grip on the housing. The device also includes a sensor including a first capacitor plate and a pair of second capacitor plates. The capacitor plates are arranged serially, and calibrated by a pulse width modulator and integrator. Operating electronics are incorporated into an application specific integrated circuit.

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patent: 6259241 (2001-07-01), Krantz
patent: 6456053 (2002-09-01), Rowley

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