Electromagnetic scale with decreased temperature variation
CA 1098552 A · Owner: Mettler Instrumente Ag · Inventors: Luchinger, Paul; Realini, Enrico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.