Smoke detector disguised as a Christmas tree ornament
US5396221A · kind A · utility
22Cited by
9References
1Claims
0Family size
Inventor
Key dates
| Filing date | Jun 28, 1993 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Jun 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/113
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A smoke alarm is disguised as a Christmas tree ornament. A lamp is connected between a power source and the control circuit of the alarm and is located on the ornament in a position where it is a part of the ornamentation. Should the lamp be extinguished this would signal that the control circuit has become disconnected from the power source calling for instant investigation and, if necessary, repair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.