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Polarity Reversing Test Probes

IP.com Disclosure Number: IPCOM000079654D
Original Publication Date: 1973-Aug-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Watson, SG: AUTHOR

Abstract

Fig. 1 is a pictorial view of a polarity reversing test probe set. These probes allow an operator using a conventional VOM or VTVM to reverse the polarity of the test probes without having to exchange the probes in his hands, or to reach back to the meter to flip the normally provided reversing switch located there. This probe allows, for example, a quick check of forward/reverse characteristics on semiconductor devices using the resistance function of the meter without interchanging probes. The probe also allows the proper reading of both positive and negative DC voltages, without having to physically remove the test probe from the point at which they are touching the circuit and then replace them to measure again.

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Polarity Reversing Test Probes

Fig. 1 is a pictorial view of a polarity reversing test probe set. These probes allow an operator using a conventional VOM or VTVM to reverse the polarity of the test probes without having to exchange the probes in his hands, or to reach back to the meter to flip the normally provided reversing switch located there. This probe allows, for example, a quick check of forward/reverse characteristics on semiconductor devices using the resistance function of the meter without interchanging probes. The probe also allows the proper reading of both positive and negative DC voltages, without having to physically remove the test probe from the point at which they are touching the circuit and then replace them to measure again.

The schematic diagram of Fig. 2 illustrates the circuitry in which a single, double-pole double-throw switch 1, is connected to probe 2 and probe 3 and, via lines 4, to a meter. As illustrated, flipping the switch 1 interchanges the electrical connection of probes 2 and 3 to the lines 4, to effect a reversing of the electrical connection as seen by the meter. The switch in this figure is a bat-handled toggle, double-pole double-throw miniature switch, but it could be a slide or push- button switch mounted in the end of the test probe for use by a forefinger rather than a thumb, etc.

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