Conveyor weighbridge with built-in calibration weight
First Claim
1. A weighbridge mounted transverse to a conveyor belt and measuring the weight, volume, and speed of product upon the conveyor belt, said weighbridge providing for calibration, comprising:
- a strut, generally slender in shape and defining the longitudinal axis of said weighbridge;
at least two mounts, spaced apart and joined beneath said strut, said mounts having a front and an opposite rear;
an activator locating upon the rear of each of said mounts;
a calibration weight locating beneath said strut, having a first position where said calibration weight is at rest and a second position where said calibration weight is applied to said weighbridge;
a tray, having a generally rectangular shape and two opposite lateral ends, said ends having a cut upon which said calibration weight rests when in said first position and two longitudinal members parallel to said struts, said tray connecting to said activator;
a spreader assembly having two mutually parallel and spaced apart spreaders, said spreaders joining to a frame;
said strut having at least two clamps spaced apart and proximate to said frame, each of said clamps connecting to at least one weight transfer bar, said weight transfer bar being parallel to said frame and said lateral ends of said tray and having two spaced apart bearings, each of said bearings including a rod descending below said weight transfer bars; and
,at least four load cells locating proximate to the intersection of each of said spreaders with said frame and each of said rods contacting one of said load cells.
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Accused Products
Abstract
The loadcell live idler platform scale has an idler to support a conveyor belt and a frame on which the rollers are mounted. The weighbridge has four load cells connected perpendicular to each end of the frame, strain gauges to receive deflections from each pair of load cells, a speed detector for the material passing upon the conveyor, and a controller for converting the signals of the strain gauges and the speed detector to the desired weight and volume data along with calibrating the scale. Beneath the idler, the scale has a calibration weight resting in a tray. Two cables, attached to the idler and its mounts, suspend the calibration weight and an activator raises and lowers the calibration weight. The calibration weight and activator are generally cylindrical and parallel to the longitudinal axis of the idler.
27 Citations
8 Claims
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1. A weighbridge mounted transverse to a conveyor belt and measuring the weight, volume, and speed of product upon the conveyor belt, said weighbridge providing for calibration, comprising:
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a strut, generally slender in shape and defining the longitudinal axis of said weighbridge; at least two mounts, spaced apart and joined beneath said strut, said mounts having a front and an opposite rear; an activator locating upon the rear of each of said mounts; a calibration weight locating beneath said strut, having a first position where said calibration weight is at rest and a second position where said calibration weight is applied to said weighbridge; a tray, having a generally rectangular shape and two opposite lateral ends, said ends having a cut upon which said calibration weight rests when in said first position and two longitudinal members parallel to said struts, said tray connecting to said activator; a spreader assembly having two mutually parallel and spaced apart spreaders, said spreaders joining to a frame; said strut having at least two clamps spaced apart and proximate to said frame, each of said clamps connecting to at least one weight transfer bar, said weight transfer bar being parallel to said frame and said lateral ends of said tray and having two spaced apart bearings, each of said bearings including a rod descending below said weight transfer bars; and
,at least four load cells locating proximate to the intersection of each of said spreaders with said frame and each of said rods contacting one of said load cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification