Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Using portable test set
Patent
1995-09-26
1997-12-30
Kuntz, Curtis
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Using portable test set
375224, 324515, 324690, 324754, H04M 100, G01R 3108
Patent
active
057039283
ABSTRACT:
A probe for use in sampling signals from a pair of telephone wires has two conductors that are separated from each other by an insulating material such as a circuit board. Each of the conductors has an overall size and has plural nonconductive interstices therein so as to reduce the capacitance of the probe. In one embodiment, each of the conductors is shaped like a comb having conductive strips. Each of the conductors could alternatively be shaped in a zig zag manner. The telephone wires are oriented parallel to the strips so as to enhance coupling therebetween. The probe can have plural channels thereon, such as two conductors on each side of the insulating material. The strips of one conductor are located in the gaps of the other conductor which on the same side of the insulating material. The probe can reduce common mode noise by being balanced. A grounded guard trace on each side of the insulating material snubs homogeneous electric fields.
REFERENCES:
patent: 3729597 (1973-04-01), Garrett et al.
patent: 5140614 (1992-08-01), Buzbee et al.
patent: 5274336 (1993-12-01), Crook et al.
patent: 5461204 (1995-10-01), Makinwa et al.
patent: 5512838 (1996-04-01), Roach
patent: 5565788 (1996-10-01), Burr et al.
Galloway George G.
Siglinger Paul R.
Industrial Technology Inc.
Kuntz Curtis
Loomis Paul
Mantooth Geoffrey A.
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