公开(公告)号：US3587746A

公开(公告)日：1971-06-28

申请号：US3587746D

申请日：1968-12-18

申请人： MATTHEW HALL MECHANICAL SERVIC

发明人： VENISON DOUGLAS MICHAEL ,  ALLEN GEORGE

IPC分类号： A62C35/60 ,  A62C37/06

CPC分类号： A62C35/605

摘要： AN ALARM VALVE MECHANISM FOR CONTROLLING THE DELIVERY OF FLUID TO A SPRINKLER SYSTEM AND BEING OPTIONALLY SETTABLE FOR EITHER A WET OR A DRY SYSTEM, SAID VALVE INCORPORATING A CLACK ARRANGED IN A VALVE OPENING, AND AN ALARM PORT, WHEREIN SAID VALVE OPENING AND SAID ALARM PORT ARE FORMED WITH CONCENTRIC SEALING FACES ARRANGED IN THE SAME PLACE AND A COMMON SEALING MEMBER IS PROVIDED TO CLOSE BOTH SAID OPENING AND SAID PORT. SAID SEALING MEMBER AND SAID CLACK ARE ALSO PROVIDED WITH MEANS TO PREVENT, IN THE WET STATE, UNINTENTIONAL OPERATION OF THE ALARM IN THE EVENT OF A CHANGE IN THE PRESSURE DIFFERENTIAL ON OPPOSITE SIDES OF SAID CLARK.