Electricity: electrical systems and devices – Polarity reversing
Patent
1978-03-02
1980-05-20
Miller, J. D.
Electricity: electrical systems and devices
Polarity reversing
361246, 324440, H01R 306, G01R 3102
Patent
active
042042437
ABSTRACT:
A polarity indicating and reversing unit for connecting a power supply line to a load line, the unit having a polarity indicating lamp for indicating a reverse polarity condition at the load and and a polarity reversing switch for reversing the polarity of the voltage applied to the load and to the polarity indicator so that the polarity indicator also indicates when the reversed polarity condition has been corrected. The application also discloses a polarity indicating and reversing unit for connecting two two-wire plus ground power supply lines each having a neutral and a hot inlet conductor to a single three-wire plus ground load line having a common neutral and two hot outlet conductors. The latter polarity reversing unit has a polarity indicator lamp for indicating when above ground potential is applied to the neutral outlet conductor, and two polarity reversing switches which are selectively operable to reverse polarity of the connections of either of the two inlet lines to the common outlet line. The unit has two inlet plugs adapted for connection to the two power supply lines and automatic disconnect relays are provided to electrically disconnect either of the inlet plugs from the unit when a power supply line is not connected to that inlet plug.
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Miller J. D.
Schroeder L. C.
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