Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2007-11-13
2007-11-13
Pham, Toan N. (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S661000, C340S664000, C340S653000, C324S076110
Reexamination Certificate
active
11005187
ABSTRACT:
A hand tool which provides an alarm signal to a user as the tool approaches a live electrical wire is disclosed. The hand tool comprises a tool head and coupled to a handle. A non-contact voltage sensing circuit is provided in the handle of the tool. As the tool approaches a live electrical wire, the non-contact voltage sensing circuit detects the voltage across the air gap between the tool head and the electrical wire, triggering an alarm circuit. The alarm circuit provides a visual or audio signal to the user.
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Applicant's Exhibit A: 1997 Gardner Bender Catalog pages showing Circuit Tester and Screwdriver and Circuit Alert Non-Contact Voltage Tester.
Brockman Daryl Charles
Luebke Thomas M.
Radle Patrick John
Steber George R.
Wiesemann David
Actuant corporation
Pham Toan N.
Quarles & Brady
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