Weighing apparatus for use as scale for persons

Details Weighing apparatus for use as scale for persons Weighing apparatus for use as scale for persons

1982-07-19

1984-10-30

Hartary, Joseph W.

Weighing scales

Load holder

Pivotally interconnected transmission levers

177DIG9, G01G 2118

Patent

active

044795629

ABSTRACT:
The long levers (3a and 3b) are capable of pivoting at one of their ends on a knife (2a and 2d), and two short levers (4a and 4b) are also capable of pivoting at one of their ends on a knife (2b and 2c). At their other end, the short levers (4a and 4b) are coupled by means of a coupling system (9 and 9a) to the long levers (3a and 3b). The other ends of the long levers (3a and 3b) are engaged at a very short distance one from the other with a force transmitting system (29) which is suspended on the free end of a flat spring (18, 21) provided with gauges (20) for measuring the bending of the spring. The gauges are connected to a read-out system through an electric circuit. The force exerted by the long levers (3a and 3b) is applied on a force transmitting system at a very short distance from the plane of symetry of the flat spring (18, 21). As a result, the force received by the flat spring is practicaly vertical and equal (or proportional) to the force exerted by the load on the tray, even when the load is unevenly distributed on the tray or when the tray is slightly deformed under the load; the accuracy of the measurements is therefore not affected in the above mentioned adverse circumstances.

REFERENCES:
patent: 3193034 (1965-07-01), Hutchinson
patent: 3844365 (1974-10-01), Ek
patent: 4363368 (1982-12-01), Paddon

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