GB326479A - Improved weighing device - Google Patents

Abstract

326,479. Marks, Sir G. C., (Bates Valve Bag Corporation). Dec. 12, 1928. Automatic-feed weighers; pendulumweight apparatus.-A weighing device of the pendulum type is provided with means for feeding material into a receptacle supported on the weighing device, and control means for stopping the feed operable by the aid of the pendulum at a predetermined point in its movement. As applied to a machine for filling valve bags placed on a feed spout 47 carried by a bag support 43, the weighbeam 37, fulcrumed on knifeedges 36, carries by means of brackets 39,40 a guide 38 along which a pendulum weight 54 may be adjusted by means of a screw 55. The guide 38 is parallel to the load arm of the weighbeam. The movements of the weighbeam are restricted by stops 75. An adjustable spring 77 acts against the pendulum until a main feed propeller is arrested by the disconnection of a driving clutch after which an auxiliary propeller continues the feed until arrested by electrical means. The weight 54 is so proportioned that the weighing device does not begin to move until the greater portion of the charge has been filled into the bag. The spring 77 preferably reaches the limit of its expansion and becomes inoperative when the main feed is cut off. The weighing device may be modified as shown in Fig. 4, wherein the weighbeam 102 carries graduated bars 116, 119 bearing sliding weights 117, 120 for fine and large adjustments. The weight 120 also carries a verticallyadjustable weight 137, and the graduated bar 119 may be adjusted horizontally by a graduated micrometer head 123 for providing a further fine adjustment. An indicating pointer 127 is actuated by a flexible band 135 connected to the weighbeam. In a further modification, Fig. 6, the indicating pointer is operated in a plane at right angles to the beam by a rack 171, and the load support 145 is suspended from the beam.