Electromagnetic scale with decreased temperature variation

Details Electromagnetic scale with decreased temperature variation Electromagnetic scale with decreased temperature variation

G - Physics

01

G

265/23

G01G 3/14 (2006.01) G01G 3/18 (2006.01) G01G 7/04 (2006.01)

Patent

CA 1098552

ABSTRACT OF THE DISCLOSURE Undesired temperature variations in scales having a force-compensating coil carrying a load-dependent current are reduced by providing an additional heat generating component, which is physically mounted adjacent to the coil. A control means is arranged to sense the magnitude of the current flowing in the force-compensating coil, and to control the quantity of heat dissipated by the additional heat-generating component, in such sense as to significantly diminish the temperature variations occurring throughout a sequence of weighings. One embodiment provides an electromagnetic scale having a main coil fed by pulse-width modulated current, fed from a constant current source, of which the power trans- istor is mounted on the coil form. Another embodiment has a bifilar winding, the additional heat being generated in one of the windings. Yet another embodiment has a semiconductor resistor mounted near or on the axis of symmetry of the coil form.

305499

Affiliated with

Also associated with

Rating

Electromagnetic scale with decreased temperature variation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electromagnetic scale with decreased temperature variation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic scale with decreased temperature variation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-86591