# US 5,703,481 A · Apparatus for detecting digital carrier signals on telephone cables

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,703,481 A
- Document ID: US5703481A
- Status: Granted
- Kind: A
- Application number: 08/646,929
- Filed: 1996-05-08
- Granted: 1997-12-30
- Earliest claimed: 1994-03-04
- Assignees: Tempo Research Corporation
- Inventors: Charles H. Wissman
- Web page: https://patentgrep.com/patent/US5703481A

## CPC

- G01R 15/18: using inductive devices, e.g. transformers
- G01R 19/145: Indicating the presence of current or voltage
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)

## Abstract

A sensor for permitting a signal carried on a tested conductor to be either inductive or capacitively coupled, in non intrusive manner, onto first or second output conductors includes a partially hollow material with high magnetic permeability wound by a first output conductor for permitting a signal carried on a tested conductor to be inductively coupled onto the first output conductor and a conductive material inserted partially within the hollow material and connected to the second output conductor for permitting a signal carried on a tested conductor to be capacitively coupled onto the second output conductor.

## Claims

### Claim 1

A sensor for permitting a signal carried on a tested conductor to be either inductively or capacitively coupled, in non-intrusive manner, onto first or second output conductors, said sensor comprising:
an at least partially hollow material having high magnetic permeability wound by a first output conductor, said partially hollow material permitting a signal carried on a tested conductor to be inductively coupled onto said first output conductor; and
a conductive material inserted at least partially within said partially hollow material and connected to a second output conductor, said conductive material permitting a signal carried on a tested conductor to be capacitively coupled onto said second output conductor.

### Claim 2 (depends on 1)

The sensor of claim 1 wherein said partially hollow material is a ferrite material.

### Claim 3 (depends on 1)

The sensor of claim 1 wherein said partially hollow material and said conductive material permit digital carrier signals and audio tracing tones to be monitored simultaneously on said first and said second output conductors, respectively.

### Claim 4 (depends on 1)

The sensor of claim 1 wherein said partially hollow material and said conductive material permit signals associated with magnetic and electric fields to be monitored simultaneously on said first and second output conductors, respectively.