Electricity: measuring and testing – Conductor identification or location
Patent
1992-09-04
1995-07-25
Wieder, Kenneth A.
Electricity: measuring and testing
Conductor identification or location
324539, G01R 3108
Patent
active
054365546
ABSTRACT:
A device for determining interconnections between terminal positions at opposite ends of cable includes a test circuit, connectors for connecting the test circuit to the terminal positions of the cable and a connector for interfacing the test circuit with a computer. The test circuit sequentially selects each of the terminal positions of the cable as a test point and includes a demultiplexing/multiplexing device for applying a test voltage to the selected terminal position, a resistor for maintaining a load resistance effective to provide a second logic signal at each terminal position other than the terminal position as the test point to which the test voltage is applied and to maintain a first logic signal at each terminal position to which the test voltage is not applied, a memory device for storing the logic signal present at each terminal position during application of the test voltage to the selected test point terminal position, and the demultiplexing/multiplexing device for determining, subsequent to removal of the test voltage from the test point, the logic signals stored by the memory device for each terminal position. A stored first logic signal is indicative of a terminal position not having a common connection with the test point and a stored second logic signal is indicative of a terminal position having a common connection with the test point. A method for determining interconnections between terminal positions at opposite ends of a cable includes operating the above described device.
REFERENCES:
patent: 4218745 (1980-08-01), Perkins
patent: 4224690 (1980-09-01), Rockwell
patent: 4257002 (1981-03-01), Helms et al.
patent: 4563636 (1986-01-01), Snook et al.
patent: 4620282 (1986-10-01), Shelley
patent: 4901004 (1990-02-01), King
patent: 4916444 (1990-04-01), King
patent: 5027074 (1991-06-01), Haferstat
patent: 5155440 (1992-10-01), Huang
patent: 5280251 (1994-01-01), Strangio
Tobin Christopher M.
Wieder Kenneth A.
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