GB1281388A - Method and apparatus for inspecting annular articles - Google Patents

Abstract

1281388 Gauging nuts; reciprocating conveyers; eddy current flaw detectors LAMSON & SESSIONS CO 27 Nov 1969 58153/69 Heading B8A [Also in Division Gl] Nuts are transferred serially to a plurality of test stations, each controlling adjacent reject stations to check for flaws and thread defects. As shown, Fig. 1, nuts N from shoot 41 are transferred to stations 2 ... 8 where they are discharged to an accept shoot 40. Eddy current flaw detectors 20, 20<SP>1</SP> inspect the bottom and top faces at stations 2 and 6, and mechanical/ pneumatic plug gauges inspect the screwthread at station 4, to control electro-pneumatically actuated traps at stations 3, 5, 7 which allow nuts to fall into reject shoots, on transfer and after detection of a defect. Transfer mechanism. Fig. 6 (and Figs. 4, 5, 7, 8, not shown).-The transfer plate 46 has nutaccommodating-openings A ... G corresponding to the test-stations, and has a rectangular movement imparted by x- and y-axis camoperated slides. Plate 78 driven by cam 83 engaging rollers 81, 82 imparts an engage and retract movement to carrier rods 47, 48 which slide in guides 51 ... 53 on a left-right movement plate 49 driven by a cam 65 (on the same shaft as cam 83). Details of the electromagnetic and mechanical test devices are given, Figs. 10, 11 (not shown).