Patent GB-801588-A (GB)
Title: Improvements in or relating to sieves, strainers and the like
IPC: B07B1/38
Filed: 1954-12-24
Abstract: 801,588. Filters. HURST, J. and RUSSELL CONSTRUCTIONS, Ltd. Dec. 22, 1955 [Dec. 24, 1954], No. 37408/54. Class 46. [Also in Group II] In a strainer of the kind comprising a strainersupporting frame flexibly mounted on suspension rods and gyrated in a horizontal plane by the out-of-balance forces exerted by a flyweight in a casing, the frame consists of the flyweight casing from which arms extend outwardly, the suspension rods are flexibly secured to the arms in substantially the same plane as the flyweight, a strainer base to which a strainer is secured is attached to the frame, and means are provided for rotating the flyweight about a vertical axis. A square angle-iron framework 11, 12, Figs. 1 and 2, supports three equispaced flexibly mounted suspension rods 13 extending downwardly into engagement with the laterally extending arms 16 of a casing 15 which houses an out-of-balance flywheel 18, Fig. 5, mounted on a vertical shaft 19. The lower ends of the rods 13 are mounted in rubber bushes at the ends of the arms 16, and a circular vibration of the casing and the strainers attached to it is produced when the flywheel is rotated. Three legs 23 of a strainer base 24 are attached to the arms 16 by bolts which also secure three inverted legs 25 of a similar strainer base 26. A nest of strainers is attached to the upper strainer base by a clamping ring 31 and tension rods 32 extending from the ring to ears 33 on the casing 15. The lower strainer base similarly carries a nest of strainers below it. An electric motor 44 drives the flywheel and is carried by a platform 43 on the framework. The motor pulley 48 is connected by a belt 49 to a pulley 50 mounted on a spindle 53, Fig. 3 ; the latter is mounted in bearings and supported by a bridge-member 45 of channel shape extending across the framework. A member 58 on the spindle is flexibly coupled to a member 59 attached to the upper end of the flywheel shaft 19 extending from its casing. The shaft 19 rotates in bearings 70, 71, Fig. 5, and, during operation, oil carried in a sump 88 is forced through the shaft and passages 87 to both bearings. A pair of weights 73, 74 is secured to the flywheel by a screw 75 and a second pair of weights 77, 78 is adjustably secured to the flywheel by a stud 79 and nut 83. The latter pair can be moved around the flywheel from a position opposite that of the weights 73, 74 to a position adjacent them. In a modification, Fig. 8, instead of the framework, a casting 91 supports the flexibly mounted suspension rods 13, and rigid depending rods 97 carry the bridgemember 45 which also supports the motor 98. Each strainer section comprises a conical member 100 over which is stretched a strainer cloth 101 and which is located within an outer bowl 102. The fines and liquid pass through the outlets 103 to a shoot 105, and the coarse material flows over the outer edges of one cloth onto the cloth below and is finally led by a conduit 37 to the group of strainers below the flywheel casing. The lower strainer section has a fines and liquid outlet 38 and a coarse material outlet 39. Specification 712,077 [Group II], is referred to in the Provisional Specification.