Digital force balanced instrument
CA 2190608 C · Owner: Litton Systems, Inc. · Inventors: Warren, Keith O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital force balanced instrument such as an accelerometer (10) that incorporates a directly digital electrostatic forcer with servo loop plates (14, 16) charged by a digital feedback loop (26 28, 30, 32, 36, 24 and 26, 28, 30, 32, 34 22). The accelerometer (10) has, a proofmass electrode (12) suspended in a cantilever configuration between electrodes (14 16) on either side thereof, which proofmass (12) is displaced upon acceleration. Each side electrode (14 16) includes a plurality of electrostatic plates (40) sized in binarily weighted multiples of area. An induced signal in the proofmass electrode (12) is quantized via an A/D converter (32) in the feedback loop which, activates the …
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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
- Filed May 31, 1995 and granted November 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2017.
- 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.