GB723573A - Improvements in or relating to vibratory conveyors and the like - Google Patents

Abstract

723,573. Jigging conveyers. GENERAL ELECTRIC CO., Ltd., and SHERWEN, J. W. June 1, 1953 [June 3, 1952], No. 14036/52. Class 78 (1). [Also in Group II] In a jigging conveyer or screen in which the support for the material or articles is mounted on double-ended leaf springs, the ends of the springs are secured to members which are capable of movement relatively to one another to accommodate the change in the distance between the ends of the springs which occurs as a result of flexure. Two longitudinal members 11, Fig. 2, mounted on the underside of the conveying trough 10 are connected at each end to the centre of a spring 12. The ends of each spring are clamped to brackets 13, Fig. 1, on frame members 14, 15 which are suspended by eyes 16 and rods 17, &c., from an overhead support. Resilient couplings 18 are inserted in each suspender. The members 14, 15 carry L-irons 32, 33 which support extension walls 30, 31 for the conveyer. The gap between the walls 30, 31, the top edges of the conveyer 10 and the members 14, 15 allows movement of the supports 17 when the springs are flexed and may be packed with rubber 34. Two pairs of horizontally-opposed compression coil springs 40 are arranged to act between channel-members 41 secured to the trough and adjustable plates 42. The core 21 and windings 22 of an electromagnetic vibrator are attached to the members 14, 15 by a vertically adjustable springy framework 23. The armature 26 is mounted on the underside of the trough 10. In a modification shown in perspective from underneath in Fig. 3, leaf springs 50 extend radially of an arcuate conveyer 52. The ends of the springs are attached to frames 53, 54 which are supported by legs 55, 57 carried by resilient blocks 56, 58. Each spring is inclined at an angle of about twenty degrees to the vertical. The vibrator 59 is arranged to exert a vertical pull. In another modification, Fig. 4, also shown as seen from below, there are three independent concentric conveyers 60, 61, 62. The ends of the springs 63 are attached to the outer conveyers and the middle points of the springs to the middle one. Each spring 63 is disposed vertically and is carried by a vertical leaf-spring 64, the lower end of which is secured to a framework 65 supported on resilient blocks 66. The cores of two electromagnetic vibrator units 67 are connected to the conveyers 60, 62 and the armatures to the conveyer 61. A similar unit 68 is mounted on the framework 65 and imparts vertical oscillations to all the conveyers simultaneously. The armature 69 of this unit is mounted directly on the framework and the core &c. 70 is maintained separated from it by coiled springs 71 which can be adjusted to vary the natural period of vibration. Specification 663,627 is referred to.