Wire identifying apparatus for identifying wires of a multiple wire electrical system

Claim 1

Wire identifying apparatus for identifying wires of a multiple wire electrical system as the wires extend between one location and another, said wire identifying apparatus comprising two separate units for use at the two locations, respectively, and designated herein as Unit No. 1 and Unit No. 2, Unit No. 2 having a plurality of terminals for connecting to one end of the wires to be identified and having a ground terminal, Unit No. 2 also having an array of resistors connected in parallel circuit with each other between the ground terminal and said plurality of terminals, there being a different resistor corresponding to each of said plurality of terminals, Unit No. 1 having a plurality of terminals for connecting to the opposite end of the wires to be identified and having a ground terminal, Unit No. 1 also having rectifier means producing a power supply, a resistor connected to said power supply and a selector switch having multiple positions corresponding to the number of terminals on Unit No. 1, said Unit No. 1 resistor interconnected with said selector switch so that as the latter is moved from terminal to terminal on Unit No. 1, the former is placed in series circuit with different ones of the resistors of the Unit No. 2 array of resistors to form a voltage divider having a junction point, "JP", said Unit No. 1 also having an analog to digital converter, a decoder driver, a plurality of 7-segment digital read-out devices forming a multi-digital read-out display, and a plurality of transistors, the input of the analog to digital converter being connected to the junction point "JP", the output of the analog digital converter being connected to the input of the decoder-driver and to the transistors, the digital read out devices being connected serially to the output of the decoder-driver and, respectively, to the transistors, the voltage at the junction point "J.P." relative to ground to be applied to the analog to digital converter corresponding to which one of the resistors of the Unit No. 2 array are placed in series circuit with the Unit No. 1 resistor, whereby when said selector switch is moved from terminal to terminal on Unit No. 1, the numbers assigned to the wires on Unit No. 2 will read out on the digital display of Unit No. 1.