GB238460A - Improvements in or relating to centrifugal machines - Google Patents

Abstract

238,460. Molen, E. van der. Jan. 24, 1925. Strainer separators; discharging.-Deposited solids such as sugar or the like are removed from a centrifugal basket by a scraper supported' by a guideway over the basket; a coupling device causes the guideway and spindle to oscillate together while the guideway is prevented from rotating with the spindle. The spindle 5 carries the basket 6 within the stationary casing 7 which supports the guide 11 composed of four parallel bars. Two slides 12, 13 work between these bars on opposite sides of the spindle. The slides are connected together by a strip 14 and support the scraper-knife 8 and a plough 9 which directs the loosened material to the opening 10. To bring the scraper into engagement with the deposited solids the slides are moved along the guide 11 by means of the screw 33. The casing carries angle pieces 16, 17 with rubber buffers 18 to prevent the guide from rotating with the basket. The guide 11 also carries two slides 27, 28 with bearing ends 29, 30, each adapted to encircle the spindle 5 through about a quarter of its circumference. The slides are moved to engage the spindle by a screwed spindle 31 so that the basket and scraper maintain a constant relative position during any oscillation. A short scraper may be used and may be reciprocated to cover the full length of the basket; the scraper may be mounted for rotation on a vertical axis to vary the cutting angle. In a modification the means for operating the slides 27, 28 are coupled with those for operating the scraper, so that the scraper can only be moved into cutting position when the slides are moved to clutch the spindle 5. In another modification, a two part ring 48, Fig. 6, is supported by the guide 11 and carries two perforated lugs to receive coupling pins 49 flexibly attached to the ends of the bifurcated lever 50 which rotates in a vertical plane on a pivot 51 in a bracket on the guide 11. The end of the lever 50 has rollers engaging in a cam groove in the slide 12 which can be moved to cause the pins to pass through the perforated lugs and engage in holes in the guide 11. In the retracted position when the pins are freed from the guide but are left in the lugs the flexible mounting permits them to oscillate with the ring 48 and the spindle 5.