×

Tractor/trailer lamp circuit continuity test device

  • US 5,604,439 A
  • Filed: 03/10/1995
  • Issued: 02/18/1997
  • Est. Priority Date: 04/15/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A tractor/trailer lamp circuit continuity test device for a tractor and trailer, the tractor having tractor circuits coupled to a tractor socket and the trailer having trailer circuits coupled to a trailer plug, the tractor/trailer lamp circuit continuity test device comprising:

  • a) an assembly plug adapted for removable connection to the tractor socket, the assembly plug comprising a ground pin and a plurality of other pins;

    b) an assembly socket adapted for removable connection to the trailer plug, the assembly socket comprising a ground socket sleeve and a plurality of other socket sleeves;

    c) a ground conductor coupled in common to the ground pin and to the ground socket sleeve;

    d) a plurality of other conductors, each other conductor coupled to a respective one of the other pins and coupled to a respective one of the other socket sleeves;

    e) an energizer having a positive terminal and a negative terminal;

    f) a switch coupled in series with the energizer;

    g) a gating diode coupled to bridge across the series-coupled energizer and switch; and

    h) a plurality of light emitting diodes,wherein each light emitting diode is coupled to a respective one of the other conductors and is coupled in common to the series-coupled energizer and switch,wherein the series-coupled energizer and switch is coupled between the ground conductor and the light emitting diodes such that the positive terminal of the energizer is coupled to the ground conductor and the negative terminal of the energizer is coupled in common to each light emitting diode,wherein activation of a continuous one of the tractor circuits energies a respective one of the light emitting diodes when the assembly plug is connected to the tractor socket by creating a respective circuit through a respective one of the other pins, the respective one light emitting diode, the gating diode, and the ground pin, andwherein activation of the switch energizes a respective one of the light emitting diodes for a continuous one of the trailer circuits when the assembly socket is connected to the trailer plug by creating a respective circuit from the positive terminal of the energizer and through the ground socket sleeve, the respective one continuous trailer circuit, a respective one of the other socket sleeves, and the respective one light emitting diode to the negative terminal of the energizer.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×