In-line switched telephone line tester
US4626633A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1985 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Feb 4, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A switched telephone tester comprises a tester body defining a connector portion of complementary configuration for receiving a modular telephone plug, a light emitting element responsive to a given voltage for emitting light, and a switch coupled with the tester body and with the light emitting element and movable relative to the tester body to a first position for placing the light emitting element in electrical circuit across tip and ring contacts of the modular telephone plug and a second position for taking the light emitting means out of circuit across the tip and ring contacts, to thereby test for the presence of a voltage across the tip and ring contacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.