Sprinkler head and operation monitor therefor
US5117916A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1991 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Apr 9, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62C37/50
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A sprinkler head of the present invention comprises a cover plate which is operated to fall down at a temperature lower than the operating temperature of the sprinkler head body and a switching unit provided on the body side of the sprinkler head so as to detect the falling of the cover plate and send a fire detection signal. A sprinkler head comprises a switching unit provided on the side of the sprinkler head body so as to send a fire detection signal when the unit is operated at a temperature lower than the operating temperature of the sprinkler head and send a sprinkler head operation signal when it is returned to a non-operating state by detection of the firewater discharged by the operation of the sprinkler head after the fire detection signal has been sent. An operation monitor for the sprinkler head of the present invention decides that the sprinkler head is operated and indicates the operation when it receives a sprinkler head operation signal from a switching unit provided on the sprinkler head and a detection signal from a water flow detector provided on piping extending to the sprinkler head. The structure in which the sprinkler head also serves as a fire detector enabl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.