Weighing apparatus and method

Weighing scales – Computer – Electrical

Patent

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Details

177 1, 177 50, 364568, G01G 2322, G01G 1952, G01G 1942

Patent

active

045124280

ABSTRACT:
An electronic weighing apparatus and method is disclosed which enables the counting of an unknown quantity of items or samples such as currency, coupons, coins or similar items of a nominally uniform weight. The apparatus includes an electronic scale which provides a signal representative of the weight of an unknown quantity of items, a microprocessor which stores a representative unit weight of the items being counted and calculates an item count, and a display for providing an output representing the running count or other value representative of the items being weighed. An accurate count of the items is obtained by placing items on or removing items from the scale in incremental groups such that the net weight of any incremental group of items must have a stable net weight equal to or below a predetermined threshold weight before the count is made. If any incremental group has a net weight which exceeds the threshold weight, items must be removed/added until the number of items in the group produces a net weight equal to or below the preset threshold and allows counting to continue. The apparatus automatically accumulates the total count made in a number of successive weighments by incrementing a memory device automatically when the scale weight reading returns to or below zero. The weighing apparatus may also be constructed to automatically sequence and count through a plurality of groups of different items to minimize operator intervention. The apparatus may additionally be constructed and operated to produce automatic verification of predetermined quantities of items without operator intervention.

REFERENCES:
patent: 3552511 (1971-01-01), Marcheso et al.
patent: 3716706 (1973-02-01), Gray
patent: 4043412 (1977-08-01), Rock
patent: 4139070 (1979-02-01), Hanson et al.
patent: 4157738 (1979-06-01), Nishiguchi et al.
patent: 4219089 (1980-08-01), Gard et al.

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