Telephone line tester
US4620070A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1985 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | Feb 4, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone line tester comprises a tester body having a connector portion of complementary configuration for insertion into a modular telephone jack; a light emitting element having a light body and a pair of elongate leads extending outwardly of the light body; guides in said tester body for guiding the elongate leads to and across the connector portion to a position for engagement with tip and ring contacts respectively of the modular telephone jack when the connector portion is inserted into the modular telephone jack. Preferably, the light emitting element comprises a bipolar LED adapted to emit a first color of light in response to a voltage of a first polarity thereacross and a second color of light in response to a voltage of opposite polarity thereacross, and to emit no light in response to substantially no voltage thereacross. The invention also contemplates a method of forming a telephone line tester of the foregoing type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.