Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Instruments and devices for fault testing
Reexamination Certificate
2007-07-30
2009-12-15
Nguyen, Vincent Q (Department: 2831)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Instruments and devices for fault testing
C324S555000
Reexamination Certificate
active
07633298
ABSTRACT:
A continuity tester for a lamp, coaxial, plug connector has a receptacle connector with first and second coaxial, annular receptacle contacts at a same axial spacing apart as power and ground contacts of the lamp connector for electrical engagement when plugged therein and, a probe contact engageable with only the power contact. First and second LEDs connect to a battery via first and second parallel circuits. A biasing resistor in the second circuit ensures that battery power is provided to only the first LED when a battery circuit is completed only by electrical engagement of the first contact and the probe contact with the power contact of the male coaxial connector to signal absence of a short circuit and to only the second LED when a circuit is completed also by engagement of the second tester contact with the ground contact of the lamp connector to signal a short circuit.
REFERENCES:
patent: 6437580 (2002-08-01), Gale
Gou Congjun
Kan Meng-Chiao
Li Quingjun
Tsai Meng-Feng
Zhang Lihua
Nguyen Vincent Q
Usher Robert W. J.
W.A.C. Lighting Co
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