Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – With electric power receptacle for line wire testing
Patent
1992-05-07
1994-02-08
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
With electric power receptacle for line wire testing
324539, 324542, 324556, 324 66, 324133, 340653, 340656, G01R 3108
Patent
active
052851630
ABSTRACT:
A single hand-held tester performs both off-line continuity tests and on-line voltage tests for electrical cables and equipment such as that used in entertainment, studio or stage lighting. A test plug and a test socket fixed one at each end enable the tester to (a) plug into a power outlet socket to check for the correct presence of a.c. line voltage, (b) engage both ends of an extension cable to test continuity and correct wiring of each wire in the cable or (c) engage the plug end of an extension cable to provide audible indication of the continuity of a load such as a lamp connected to the cable. In a three-conductor (hot, ground and neutral) embodiment, a row of three test pushbuttons, one for each conductor, corresponds with an adjacent row of three LED continuity indicators. Three neon lamps indicate the presence of a.c. voltage between contact members of a power outlet under test. Special protective circuitry including a set of blocking diodes and a current-limiting lamp prevents accidental powerline overload or damage.
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Brown Glenn W.
McTaggart J. E.
Wieder Kenneth A.
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