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US 4,643,224 AGranted
Alarm test device for a sprinkler system
AssigneeVictaulic Company of America
InventorsRobert Rung, Philip R. Schwarz
Life of this patent
Estimating the term…
Abstract
An alarm test device for a sprinkler system incorporates test and drain valves, together with a sight glass and a metering orifice into a single test valve, with the option of employing a plug valve as the test and drain valves, and the further option of employing a combined sight glass and metering orifice as the plug valve.
Claims5
An alarm test module for a fire extinguishing sprinkler system, including in combination:
- a unitary valve body providing an inlet, an outlet, and at least one valve seat communicating said inlet with said outlet;
- a sight glass in the form of a solid cylinder of transparent material extending transversely through said valve body and exposed at opposite end viewing surfaces located externally of said valve body, said sight glass being interposed between said inlet and said outlet and having a metering passage extending diametrically therethrough providing for controlled communication of said inlet with said outlet;
- and,
- valve means cooperating with said at least one valve seat for selectively connecting said inlet directly to said outlet, for selectively connecting said inlet to said outlet via said metering orifice, and for selectively isolating said inlet from said outlet.
1 more element
Dependencies are inferred from the claim text.