DEVICE TESTING DIAMETRICAL DIMENSIONS OF INTERNAL GROOVES ACCOMMODATING SEALING RINGS, COLLARS, GLANDS Russian patent published in 1997 - IPC

FIELD: instrumentation. SUBSTANCE: proposed device includes case 1 and rod 2 with root 3 moving inside it. With movement rod 2 rests against root 4 of indicator deflecting pointer of indicator by value of movement from nominal dimension. Root 3 it put on rod 2 with capability of re-adjustment and root 5 is set immobile. Two springs 8 perform required tension of root 3 till it touches diametrical surface of measured groove. EFFECT: improved accuracy of measurements, simplified design of device. 2 dwg