Combined continuity and voltage test instrument
First Claim
1. 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, anda 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.
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Accused Products
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.
26 Citations
6 Claims
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1. Combined continuity testing and voltage indicating apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification