Electricity: measuring and testing – Electric lamp or discharge device – Electric lamp
Patent
1995-09-12
1997-02-18
Wieder, Kenneth A.
Electricity: measuring and testing
Electric lamp or discharge device
Electric lamp
324133, 324537, 324556, 340642, G01R 3102
Patent
active
056044364
ABSTRACT:
A device for finding an inoperative bulb in a series string of lights, such as a string of Christmas tree lights having a plug, a pair of electrically conductive leads connected to the plug and having their ends terminating within a casing of the device, a polarity switch having first and second terminals each connected to a lead of the pair of leads connected to the plug, a probe for insertion into and contact with the wire of the socket of the light string, and an indicator circuit for determining whether an electric current is passing through the series string thus indicating the presence or lack of an inoperative bulb. The indicator circuit is located between the polarity switch and the probe and a protective sheath is provided to prevent any part of the probe from being exposed to avoid a user from being shocked, the protective sheath being continuously biased to cover the probe.
REFERENCES:
patent: 3760266 (1973-09-01), Ocasio et al.
patent: 4918392 (1990-04-01), Torres
patent: 4999574 (1991-03-01), Stephens
patent: 5047721 (1991-09-01), Farley
patent: 5179339 (1993-01-01), Volk, Jr.
patent: 5319312 (1994-06-01), Segilia
patent: 5369363 (1994-11-01), Hey
Henritzy Charles L.
Maddock William
Do Diep
Meehan Thomas A.
VanOphem John
VanOphem Remy J.
Wieder Kenneth A.
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