G - Physics – 01 – R
Patent
G - Physics
01
R
324/59, 324/58.3
G01R 31/02 (2006.01) G01R 19/155 (2006.01)
Patent
CA 1275444
ABSTRACT A HAND HELD DEVICE FOR USE IN BOTH TESTING ELECTRICAL CONTINUITY AND DETECTING VOLTAGE SOURCES A hand held device for use in testing of electrical continuity and detecting voltage sources is described which consists of a housing (14) in which is mounted voltage source (2), an LED indicator (4) electrically connected to one side of the voltage source, and a transistor (1) electrically connected between the LED (4) and the other side of the voltage source (2). A probe (8) extending from the housing is connected to the base of the transistor (1). The transistor (1) is turned on by voltage applied thereto and a contact terminal (6) is provided mounted to the exterior of the housing which is connected to the voltage source (2), and which, in use, contacts the hand of a user of the device holding the housing. In use, the probe (8) is applied to a circuit to be tested and the user's body closes the circuit between the circuit to be tested and the contact terminal (6), such that if the circuit to be tested is active, that is it comprises electrical continuity or a voltage source, a voltage is applied to the semiconductor control (1) which turns on causing illumination of the LED.
532692
Macdonald John L.
Rogers & Scott
LandOfFree
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