Improvements in and relating to Flow Rate Meters

摘要: 1,190,912. Valves. GERVASE INSTRUMENTS Ltd. 23 May, 1967 [7 March, 1966], No. 9936/66. Heading F2V. [Also in Division G1] In a fluid flow rate meter the effective area of measuring orifice 12 is determined by relative position control member 10 dependent upon differential pressure across and on an amplifying plate 24 connected to increase opposition spring 28. The indicated pointer 34 scale 38. further embodiments bellows (Figs. 2 3, not shown), being fed internally with outlet or atmospheric subjected externally inlet pressure. embodiment (Fig. 4, shown) fixed provided attached device can act as non-return valve.