Title:
METHOD AND APPARATUS FOR DETECTING A SPRINKLER ACTUATION EVENT
Document Type and Number:
WIPO Patent Application WO2006055087
Kind Code:
A3
Abstract:
A method of detecting the actuation of a sprinkler involves sensing a first fluid pressure at a first flow cross section, in one of the sprinkler and a conduit in which the sprinkler is mounted, sensing a second fluid pressure at a second flow cross section, in the sprinkler, wherein said first flow cross section is larger than said second flow cross section, and comparing the fluid pressures sensed at the first and, second flow cross sections in order to detect a change in the relation of the fluid pressures due to actuation of the sprinkler, and thereby detect actuation of the sprinkler. The fluid pressures are sensed by ports in the sprinkler, or by one port in the sprinkler and one port in the conduit, and at least one transducer connected to the ports, and output signals from the transducer are sent to a computer or other recording instrument.
Inventors:
HESKESTAD GUNNAR (US)
Application Number:
PCT/US2005/033365
Publication Date:
October 12, 2006
Filing Date:
September 19, 2005
Export Citation:
Assignee:
FM GLOBAL TECHNOLOGIES LLC (US)
HESKESTAD GUNNAR (US)
HESKESTAD GUNNAR (US)
International Classes:
A01G27/00; A62C35/00; B67D7/08
Foreign References:
| US3797740A | 1974-03-19 | |||
| US5717146A | 1998-02-10 |
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