Hand held non-contact voltage tester
First Claim
1. In a non-contact voltage tester of the type having a single probe tip for sensing the presence of a voltage, an indicating lamp for signalling a user of the tester when said voltage is present, circuitry for detecting a voltage at said probe tip and operating said indicating lamp in response to said detected voltage, a battery power supply for energizing said circuitry and a switch actuated by the user of said tester for operatively connecting said power supply with said circuitry, the improvement wherein said indicating lamp emits a signal of limited duration to the operator when said switch is first actuated by the user in the absence of a voltage detected by said circuitry at said probe tip and said lamp is positioned inside a translucent section of a housing of said tester, said lamp and translucent section being positioned between said switch and said probe tip.
17 Assignments
0 Petitions
Accused Products
Abstract
A non-contact voltage tester has a self-test feature so that when a switch clip of the tester is actuated, light and sound indicator devices are energized to give a single blink and beep, respectively, following which the tester is ready for probing for a voltage. The light and sound indicator devices also indicate the presence of a voltage when the switch is actuated and a voltage is detected at the probe tip of the tester.
-
Citations
3 Claims
- 1. In a non-contact voltage tester of the type having a single probe tip for sensing the presence of a voltage, an indicating lamp for signalling a user of the tester when said voltage is present, circuitry for detecting a voltage at said probe tip and operating said indicating lamp in response to said detected voltage, a battery power supply for energizing said circuitry and a switch actuated by the user of said tester for operatively connecting said power supply with said circuitry, the improvement wherein said indicating lamp emits a signal of limited duration to the operator when said switch is first actuated by the user in the absence of a voltage detected by said circuitry at said probe tip and said lamp is positioned inside a translucent section of a housing of said tester, said lamp and translucent section being positioned between said switch and said probe tip.
Specification