Volume change adder for leakage detecting device

Abstract

Abstract PURPOSE: To give a precise volume change by arranging a movable piston in a cylinder provided with stoppers at both ends. CONSTITUTION: A movable piston 34 is arranged in a cylinder 33 having both ends closed by end plates 31, 32 and a fixed stopper 38 and the inside thereof is air tightly divided into spacings 35W37 and respectively connected to an air pressure source 11, a work 16, and a reference tank 17 through passages 53W55 and magnet valves 13W15 and 56 and the like. Thus, a micro meter head 41 is adjusted to set a movable stopper 39 to a predetermined position, air pressure from the air source 11 is introduced into a spacing 35 to move the piston 34 rightward until the shaft thereof 44 abuts against the movable stopper 39, and then a spacing is communicated with the atmosphere by the control of the magnet valve 56, so that the piston 34 moves leftward until it abuts against a fixed stopper 38 instantaneously by means of a spring 46 and volume in the spacing 36 or, the volume at the side of the work 16 is instantaneoulsy increased by volume determined by the distance of movement L. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Akio Furuse

Bibliographic Details