Fire extinguishers – Sprinkler heads
Patent
1991-04-09
1992-06-02
Focarino, Margaret A.
Fire extinguishers
Sprinkler heads
169 17, 169 23, 169 61, A62C 3708, A62C 3711, A62C 3721, A62C 3562
Patent
active
051179164
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 enables a reduction of the cost of fire extinguishing equipment and the simplification of the installation work thereof, as well as an improvement in the appearance. It is also possible to detect the discharge of water from the sprinkler head without giving false information.
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patent: 5020601 (1991-06-01), Retzloff et al.
Nakajima Takahiro
Ohta Tomohiro
Focarino Margaret A.
Hochiki Kabushiki Kaisha
Kannofsky James M.
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