Weighing scales – Weigher responsive material control
Patent
1983-08-22
1985-10-29
Goldberg, E. A.
Weighing scales
Weigher responsive material control
177 25, 177208, 177DIG7, 364567, G01G 1326
Patent
active
045496200
ABSTRACT:
A weighing system is disclosed which operates in conjunction with a scale that has a trigger mechanism for terminating the flow of material into the scale's bucket. This system automatically periodically revises a tare signal stored in a latch circuit for combination with a weight signal to produce a net weight signal. The tare signal provides a measure of the residue stuck in the scale bucket. In an additional embodiment of the invention, a programmable controller is used as the means for periodically resetting the tare signal and is used to evaluate the final weight data to determine the average weight and the standard deviation of the weights. These determinations are used by the controller in combination with a predetermined weight to arrive at a computer setpoint signal for adjustment of the triggering of the flow termination so that the final weights will most closely approximate the predetermined weight. Further disclosed is a volume sensor for detecting whether the weighed material fills at least a minimum volume.
REFERENCES:
patent: 2704197 (1955-03-01), Howard
patent: 3648035 (1972-03-01), Hart et al.
patent: 3828869 (1974-08-01), Sellers
patent: 4229794 (1980-10-01), Foster
patent: 4363370 (1982-12-01), Sarkison
patent: 4448272 (1984-05-01), Keller et al.
Catrambone Frank A.
Dee Gerald M.
Asher Robert M.
Gammons Robert T.
Goldberg E. A.
Kampe Fred L.
Pneumatic Scale Corporation
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