Electricity: measuring and testing – Testing potential in specific environment – Voltage probe
Patent
1992-10-15
1994-03-08
Wieder, Kenneth A.
Electricity: measuring and testing
Testing potential in specific environment
Voltage probe
324457, 340661, G01R 3102, G08B 2100
Patent
active
052931137
ABSTRACT:
A testing device for single-pole voltage testing comprises, between a test electrode (1) and a ground electrode (2), a high impedance dropping resistor (R1) and a measurement resistor (R2) connected in series. The ground electrode (2) is capacitively coupled to earth through the body of the user. The value of the dropping resistor (R1) is at least 10 times greater than the maximum variation which occurs in the capacitively coupled reactance (C1, C2) of the user relative to the ground, so that the total impedance is almost constant. The voltage drop across the measurement resistor (R2) is amplified, rectified and compared in a comparison circuit with predetermined reference voltages in order to control a light emitting diode indicator (D2, D3, D4, D5) corresponding to the measured voltage. The test device can also be constructed for contactless voltage testing or can also be used as a continuity tester.
REFERENCES:
patent: 3412392 (1968-11-01), Jenkins et al.
patent: 3431493 (1969-03-01), Knoth et al.
patent: 3786468 (1974-01-01), Moffitt
patent: 4205264 (1980-05-01), Gold
patent: 4349783 (1982-09-01), Robson et al.
patent: 4558309 (1985-12-01), Antonevich
patent: 4758792 (1988-07-01), Polomis et al.
patent: 4785294 (1988-11-01), Campbell
patent: 4859992 (1989-08-01), Haigaard
patent: 4916570 (1990-04-01), Dale
patent: 5105181 (1992-04-01), Ross
patent: 5150038 (1992-09-01), Kanemaru et al.
Beha Christian
Schwartz Martin
Ch. Beha BmbH
Johnson Haynes N.
Regan Maura K.
Wieder Kenneth A.
LandOfFree
Test instrument for the display of electric voltages does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Test instrument for the display of electric voltages, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Test instrument for the display of electric voltages will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-156271