PRESSURE INDICATOR FOR FIRE EXTINGUISHER Russian patent published in 1995 - IPC

FIELD: measuring equipment. SUBSTANCE: pressure indicator has housing with passageway for supplying fluid to be measured, and transparent cover. The side of the cover abuts against the side of the housing and bears on its collar. The side of the transparent cover, which abuts upon the housing, is provided with a groove overlapped with the collar. The diaphragm is welded or soldered to both parts of the housing over its outer surface. The ring baffle, which arrests movement of the diaphragm when pressure exceeds a permissible value, is mounted inside the housing parallel to the diaphragm. The diaphragm is coupled with the pointing member through converting mechanism and reduction gear mounted in series. The converting mechanism is set in two bearings fixed inside the housing and made up as a rod with screw groove, the rod being set in supports for permitting rotation and axial displacement, spring which presses the rod to the diaphragm, and projection provided on one of the supports and contacting with the screw groove of the rod. EFFECT: enhanced reliability. 3 dwg