Electric meter

Details Electric meter Electric meter

1975-08-06

1978-05-30

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Meter protection or fraud combatting

324 62, 324115, G01R 136, G01R 1512

Patent

active

040925919

ABSTRACT:
A combined electric meter for measuring AC and DC voltage and ohms is provided with read-outs having indicators progressively actuated for simultaneously indicating AC and DC voltages and for indicating ohms. The read-outs are in the form of light emitting diodes in which the lights are progressively illuminated to indicate a range of voltage or ohms. A pair of probes are manually connected to the circuit to be tested and provide a common connection for the voltage and ohm section of the meter. Should voltage be sensed by the probes, the ohmmeter section is automatically taken out of circuit to protect it from damage. A high speed switch transistor is responsive to an external voltage across the probes for opening the ohmmeter circuit before the external voltage can cause damage to the ohmmeter. The meter has an internal power supply for operating the read-outs and providing a regulated voltage for a resistance to be measured by the ohmmeter section.

REFERENCES:
patent: 2648820 (1953-08-01), Miller
patent: 3024388 (1962-03-01), Blitchington, Jr.
patent: 3392332 (1968-07-01), Christensen
patent: 3440538 (1969-04-01), Riley
patent: 3536998 (1970-10-01), Nordholm
patent: 3588609 (1971-06-01), Keen
patent: 3667041 (1972-05-01), Senour
patent: 3825827 (1974-07-01), Tumbush

Affiliated with

Also associated with

Rating

Electric meter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electric meter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric meter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-471577