Unitary alarm sensor and communication package for security alarm system
US4990888A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1986 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Feb 25, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S439/911
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A security alarm system includes a transponder having a housing enclosing both a sensor and associated circuit means in a unitary package. The housing base includes barrel-shaped connectors, and a pc board carrying the communications components is carried by the housing cover. Flag-like connectors mate with the barrel-shaped connectors when the cover is attached to the base, and the connectors give both good mechanical indexing and retention, and effective electrical contact. Removal of the cover from the base breaks the electrical contact and thus breaks continuity back to the system controller, indicating someone has tampered with the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.