Weighing scales – Preset – Responsive to load receiver
Patent
1976-09-27
1978-01-31
Tollberg, Stanley H.
Weighing scales
Preset
Responsive to load receiver
222 55, 198504, 364567, G01G 1314, G01G 2314
Patent
active
040711021
ABSTRACT:
Apparatus for generating a belt tare compensation signal including a load cell in operative contact with a feed conveyor belt dividable into N equal segments. The output of the load cell is strobed each time the conveyor belt advances one sampled and a pulse train representative of the output of the load cell is generated. The pulse train is applied to a pulse counter if the output of the load cell is greater than a predetermined value and is applied to a minus counter if the output of the load cell is less than a predetermined value. At the end of a single revolution of the conveyor belt, a signal representative of the difference between the count in the plus and minus counters is generated. This signal is divided by N so as to generate a belt tare compensation signal which is representative of the average output of the load cell during a single non-loaded revolution of the conveyor belt.
REFERENCES:
patent: 2974518 (1961-03-01), Jones
patent: 3447906 (1969-06-01), Zimmerli
patent: 3724720 (1973-04-01), Bullivant
patent: 3853267 (1974-12-01), Cadwell et al.
patent: 3868643 (1975-02-01), Bullivant
patent: 3976150 (1976-08-01), Wilson et al.
Sturgeon Michael E.
Van Ostenbridge Ron
K-Tron Corporation
Rolla Joseph J.
Tollberg Stanley H.
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