Weighing scales – Self-positioning – Electrical current generating or modifying
Patent
1976-10-14
1978-07-11
Hartary, Joseph W.
Weighing scales
Self-positioning
Electrical current generating or modifying
177212, G01G 700
Patent
active
040995879
ABSTRACT:
Weighing apparatus of the electromagnetic compensation type is disclosed, wherein the compensation coil means is continuously supplied with a first component of compensation current which at least partially compensates for the no-load preloading effect of the movable pan carrier system, said coil means being periodically supplied with a second component of compensation current which is a direct function of the magnitude of the load being weighed. Indicating means are provided which are responsive to the magnitude of the second current component to present a visual indication of the magnitude of the load being weighed. In one embodiment, separate sources of compensation current and counter pulses are provided, while in a second embodiment the compensation current is obtained from a pulse generator supplied with a high frequency voltage from the source which provides the counting pulses.
REFERENCES:
patent: 3688854 (1972-09-01), Strobel
patent: 3786678 (1974-01-01), Kunz
patent: 3786883 (1974-01-01), Kunz
Hartary Joseph W.
Laubscher Lawrence E.
Mettler Instrumente AG
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