Weighing apparatus having temperature-modified electromagnetic c

Details Weighing apparatus having temperature-modified electromagnetic c Weighing apparatus having temperature-modified electromagnetic c

1997-04-09

1999-01-05

Gibson, Randy W.

Weighing scales

Self-positioning

Electrical current generating or modifying

G01G 314

Patent

active

058566384

ABSTRACT:
Weighing apparatus of the electromagnetic load compensation type includes a thermal conductor for transmitting coil heat from the internal region adjacent the air gap of a permanent magnetic field within which the compensation coil is arranged to a remotely-arranged thermal sensor, thereby to dissipate the coil heat and to modify as a function of internal temperature the compensating current that is supplied to the compensation coil. As a consequence of the dissipation of heat from the air gap, heating of the permanent magnet and its pole member is avoided, thereby, to prevent variation of the intensity of the permanent magnet field.

REFERENCES:
patent: 4091886 (1978-05-01), Knothe et al.
patent: 4489800 (1984-12-01), Nufer et al.
patent: 4545448 (1985-10-01), Kunz
patent: 4722409 (1988-02-01), Kunz
patent: 4730683 (1988-03-01), Reichmuth
patent: 4938300 (1990-07-01), Kunz
patent: 5141066 (1992-08-01), Strickler
Physics, Hans C. Ohanian, W.W. Norton & Company, Inc. New York, N.Y., pp. 900-902, 1985.

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