Patent GB-294525-A (GB)
Title: Improvement in centrifuge
IPC: B04B9/00
Filed: 1928-05-09
Abstract: 294,525. National Acme Co., (Assignees of Paterson, D. S., and Petsche, G. B.). July 25, 1927, [Convention date]. Density separators; casings; driving.-A separator or clarifier for liquids has a rotary bowl which can be separated from its supporting and driving means, and shifted laterally out of the machine casing. The bowl 21 is housed in the casing 1, Fig. 2 which has a door 114 and also has a sliding bracket 8 for the support of the electric driving motor 9. The belt 17 from the motor pulleys 12 passes over the guide pulleys 14, 3 to the pulley 18 on the spindle 19. Various sizes of motor pulleys may be used and the belt adjusted by the operation of the hand wheel 6 to turn the screw 5 to move the bracket 8. The spindle 19, Figs. 2, 8 which supports the bowl has a lower portion 22 of smaller diameter than the upper portion and the intermediate shoulder 24 rests upon the collar 25. Ball bearings 32, 34 are provided, and lubricant is supplied through the pipe 26; it passes through the bearings to the annular chamber 29 and is drawn off by the pipe 30. The chamber 29 is formed in the part 28 attached to the casing 36 by screws. The lower end of the upper casing 42 enters the casing 36 and a spring 39 is arranged to act between the two parts. The lower part of the spindle passes through the sleeve 27 and carries the pulley 18. The head 46 at the top of the spindle, carries two pins 47 which engage in holes in the bottom plate of the bowl. The bowl 21 contains annular chambers 66, 68, 70, Fig. 4, formed by cylindrical walls 56, 58, 60 and openings are made in these walls so that liquid supplied from the inlet funnel 63 travels down through the cylinder 60, up the chamber 66, down the chamber 68 and up the chamber 70 to the outlet 72. The clarified liquid from the outlet enters the chamber 73 in the cover and passes away by a discharge spout. An upper discharge chamber 75 receives, any excess of liquid supplied. The cover 77 containing the discharge chambers has an inturned bottom lip, or annular hook 83, Fig. 13 which is engaged by hooks 84 on spring strips 85. The lower ends of these strips are secured to hubs 87 each of which is mounted eccentrically on the casing 1 and provided with a handle 88. With the parts in the positions shown in Fig. 13 the cover 77 is locked to the casing, but an outward movement of each handle will disengage each hook so that the cover can be removed. Each hub 87 contains spring- pressed plungers so that the parts can be retained in the positions set by the handle. The upper part of the bowl is steadied by packing 100 of an inverted U-shape, interposed between the gland 99 and the sleeve 101, Fig. 13. The drum can be braked by means of a shoe 105, Fig. 2, which can be raised to engage the lower end of the bowl by the rock arm 107 operated by an external handle. A lever 117, Fig. 2, is secured by a pivot 118 to the door 114 of the casing. The inner end of the lever is forked as shown in Fig. 15, and the forked ends 119 enter slots 120 in a disc attached to the bowl when the cam 122 is operated by the handle 123 to depress the end 121. This action raises the bowl and lifts the lower plate clear of the pins. 47 on the head of the spindle 19. With the cover 77 removed the door 114 can then be opened, carrying with it the bowl 21 in the ring 115, the bowl being supported on the forked ends 119 of the lever 117.