Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1995-03-15
1996-12-17
Chilcot, Richard
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73762, 4147989, G01N 300
Patent
active
055855687
ABSTRACT:
A force sensing assembly measures a magnitude of a force generated at the tabs in a product delivery system. The product delivery system can be one in which a force is produced at the tabs by the weight of the stack, by a paddle pushing an end of the stack, or by another similar type of advancing mechanism. In a preferred embodiment, the force sensing assembly has a pair of tabs connected to a cross-bar which extends across the stack and which is connected to the frame of the feeder through a bell crank at one end and a lever at the other end. The bell crank has one arm connected to the cross-bar and a second arm connected to a load cell. The force at the tabs causes the lever and bell crank to rotate, with the force being transmitted through the bell crank, through a spring, and then to the load cell. The load cell generates a force signal which is supplied to a controller for adjusting the amount of force at the tabs. The controller adjusts the force by adding more products to the stack or by advancing the stack closer to the tabs. The load cell preferably has a stopper for preventing an excessive amount of force from reaching the cell.
REFERENCES:
patent: 4041853 (1977-08-01), Verwey et al.
patent: 4162869 (1979-07-01), Hitomi et al.
patent: 4501528 (1985-02-01), Knapp
patent: 5374151 (1994-12-01), Mattews
Bacco David R.
Moncrief Frank
Chilcot Richard
Noori Max H.
Riverwood International Corporation
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