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Detecting Wiring Errors

IP.com Disclosure Number: IPCOM000097176D
Original Publication Date: 1962-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Buckner, P: AUTHOR [+3]

Abstract

The circuit compares two identical passive networks I and II. For checking purposes, there are compared either two unknown networks required to have identical parameters, it being assumed that an error does not occur twice at the same point, or there is compared a correct network within one to be checked.

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Detecting Wiring Errors

The circuit compares two identical passive networks I and II. For checking purposes, there are compared either two unknown networks required to have identical parameters, it being assumed that an error does not occur twice at the same point, or there is compared a correct network within one to be checked.

Stepping is performed by means of two contact levels 6 and 7 of a rotary selector. The number of steps the rotary selector advances equals the number of wirings to be checked by the test network. By serially connecting any number of selectors, it is possible to connect any desired number of networks and any desired number of wirings, respectively.

Each of the test networks to be compared has associated with it a glow lamp arrangement 2 and 3, respectively. One lamp is respectively associated with each junction of wirings. The junctions are interconnected through two equal high resistances 4 and 5, respectively. :AB If the comparison shows both networks are equal, each glow lamp has a voltage of (U/2)-U1 connected to it. The voltages are so selected that the glow lamp does not flash in this case and that no current flows through error relays 8 and 9.

If, however, the voltages are unequal due to a missing connection, a wiring error or a short circuit between two junctions in one of the two networks, the respective glow lamp has a voltage of U - U1 connected to it. Thus, the lamp flashes and draws a current which causes the error relay to be...