Combined continuity and voltage test instrument
OwnerGerald D. Kahldeninventor
Life of this patent
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Abstract
An electrical testing device comprising two circuit legs connected in parallel to a pair of test probes. The first circuit leg is primarily for indicating continuity and includes a battery in series with a current limiting resister, a diode, and a sounding device across which is connected a zener diode for protection purposes. A second circuit leg includes a resistive voltage divider in series with a zener diode with, in a preferred form, a neon indicator light connected in parallel to all but one of the resisters in the divider network. The functioning of the circuitry as a voltage indicator or a continuity indicator is dependant solely on the nature of the circuit to which the probes are connected.
Claims6
Combined continuity testing and voltage indicating apparatus comprising:
- first and second terminals adapted for connection to test probes,
- a first circuit leg coupled between said first and second terminals, said first leg including a sounding device connected in series with a current limiting resistance, and
- a second circuit leg coupled between said first and second terminals, said second leg including a series connected resistor divider network, and a plurality of indicator lamps connected across resistors in said divider network.
Dependencies are inferred from the claim text.