Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1977-10-31
1979-08-14
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01R 3102
Patent
active
041647025
ABSTRACT:
An electrical tester to test wall type electrical receptacles, such as are commonly seen in a home, such receptacles consisting of a so called "female plug" of the three wire kind that provides electric power to appliances used in the home or in establishments. The tester has the intrinsic property of detecting if the Ground and Neutral wires to such a receptacle are reversed with respect to the Hot wire. The tester also detects common defects such as reversals between Hot and Ground wires or between Hot and Neutral wires, or for "open" conditions in such wires to the receptacle. The tester will definitely establish if proper orientation of both Neutral and Ground wires to the receptacle exists with respect to the Hot wire, especially so if the three wire cable that connects to such a receptacle is of the type allowed to have a smaller cross section wire for the Ground than for the Neutral and Hot wires. The tester is a hand held apparatus having three indicating lights, a spring loaded push button reversible switch and a calibrated adjustable potentiometer. The tester is easy to use and its indications do not depend on or measure the quality of "earth's grounds" but is mainly for the use of determining the proper wiring of such wall sockets.
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