Heat alarm indicator
US4404923A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1981 |
| Grant date | Sep 20, 1983 |
| Priority date | — |
| Expiry date | Jul 14, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/06
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A heat alarm for releasing a strong readily noticeable odor when subjected to heat above a preselected level. A glass container having an elongated breakable neck portion is filled with an odoriferous fluid. When the neck portion is broken, the fluid can escape from the container. The fluid upon contact with the atmosphere creates a strong odor the presence of which is immediately apparent to all persons within the surrounding area. A heat reactive member that bends upon being subjected to heat above a preselected level is arranged around the neck portion of the container. When this heat reactive member is subjected to heat above the preselected level, the member bends and breaks the neck portion of the container thereby enabling the fluid to escape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.