Demand limit control by integral reset of thermostats
CA 1313552 C · Owner: Kidder, Kenneth B. · Inventors: Kidder, Kenneth B.; Wacker, Paul C.; Smith, Gary A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A temperature control system for a building is disclosed utilizing a central demand limit controller. The system includes a number of control modules or thermostats that have both proportional error and integral error functions. The integral error is reset at intervals by an interstage differential to drop single stages of air conditioning. This reduces demand until the maximum allowed demand is met. The integral error function is a timed function and the stages return in a random manner to restore setpoint temperature.
Read the whole patent
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 February 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 2010.
- 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.