Test pen for lamp strings

Abstract

A test pen for lamp strings, comprising a main body formed from an upper and a lower housing and having therein an electric circuit board, a end cap is fit over one end of the main body, the test pen thus is adapted to be clamped on a suit of one's clothes. The upper housing is provided in a plurality of windows thereon in an exposing way with a control switch, a first and a second testing contact group for a fuse and a miniature lamp bulb respectively, and a testing contact piece provided on an end in opposition to the end cap for testing electric current on conductors. The control switch controls a display light to show normality of test members, the electric circuit board is provided with an illuminating switch to be controlled by an exposed illuminating push button to control lightening or turning off of said display light. The testing contact piece can be used as a test device for common lamp bulbs and special miniature lamp bulbs.

Dependencies are inferred from the claim text.