Patent GB-444905-A (GB)
Title: Improvements in automatic continuous weight integrators and continuous weight totalisers and recorders applied to endless conveyors
IPC: G01G11/02
Filed: 1934-10-02
Abstract: 444,905. Weighing-apparatus fitted to conveyers. BROWN, S. C., 9, Karridale Mansions, London. Oct. 2, 1934, No. 28135. [Class 143] [See also Group XIX] In an automatic continuous weight integrator, totalizer, and recorder fitted to an endless conveyer, wherein a suitable counting recorder is continuously rotated at appropriate variable speeds by a friction drive, the speed is varied by a movable driving connection between two or more rotating rollers, one of which has a conical surface, the driving connection being adjusted relative to the rollers by the variations in the load on the conveyer. As shown in Fig. 1, the upper and lower strands 1, 2 of the conveyer are supported between the idlers 21, 21<a>, 21<b>, 21<c> by rollers 7, 8 suspended from the opposite ends of a weighbeam 10<1> having a depending arm 18 terminating in a loop 19, Fig. 3, enclosing a pair of balls 14. The balls form the driving connection between a pair of cylindrical rollers 11, 12 (driven by gearing from a pulley 6 pressing on the conveyer) and a conical roller 13. The cylindrical rollers 11, 12 and the conical roller 13 are connected to the opposite sides of a differential gear 17, the resultant movement of which is transmitted to the weight totalizing counter. Variations in the load carried by the conveyer rock the arm 18 and move the driving balls along the conical roller to change its speed and effect corresponding variations in the differential gear and totalizing counter. In order to prevent slip between the balls and the rollers, a row of permanent magnets is placed under each roller to attract the balls into firm contact with the rollers. The driving pulley 6 may be detached and rolled by hand along the weighing section of the conveyer to check the distance between the idlers. A graphical record may also be obtained on a chart drum, in which case the weighing roller 7, Fig. 8, may be connected to a whippletree lever 26, the opposite ends of which control respectively the integrator 3 and to the pen arm 37. In a modification, Fig. 9, both the integrator and the pen arm are controlled from the arm 18 of the weighbeam. The movements of the arm 18, acting through a bell-crank lever 53, rod 52<a> and roller 46 raises and lowers the pen arm 37 relative to the chart drum 36 as the load varies. Variations in the speed of the conveyer are transmitted to a centrifugal governor 51 and thence by a lever 49 to the roller 46 in order to vary the leverage of the pen arm and thus compensate the load ordinate on the chart for the speed variations of the conveyer. Graduations 61 indicate the hourly tonnage rate of material in transit. In a further modification, the apparatus is adapted for operation in either direction of travel of the conveyer, two totalizers being provided, one for each direction of travel, the change-over from one totalizer to the other being effected automatically. In a further modification, Fig. 15, wherein the occupation of space above the conveyer is avoided, the loaded section 1 of the conveyer is supported by bell-crank levers 84, 85, one of which carries the ball-adjusting arm 18 and a pendulous resistant 90.