Burglar alarm system having reduced wiring
US6992579B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 2003 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Mar 23, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/06
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Normal hard-wired domestic burglar alarms have cables with six conductors extending between the alarm controller and each remote input/output device (such as an entry keypad). The present alarm system has an alarm controller, a remote input/output device, a cable extending from the alarm controller to the remote input/output device, the cable comprising two conductors only, providing power to the remote input/output device. A signal processor at the controller monitors and processes voltage and current in the conductors to affect functions of the alarm system. A mixer at the remote input/output device processes voltage and current in the conductors to affect functions of the alarm system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.