Demand controller
CA 1060980 A · Owner: Sangamo Electric Company · Inventors: Mccollum, Samuel C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A peak load control And power-distributing system for residential or small commercial/industrial use in which some loads are uncontrolled and others are controlled. Current transformers in the main feeder for all loads supply currant to a thermal switch to detect when the power demand exceeds a predetermined value. The thermal switch starts a small synchronous motor having gears driving a shaft with cams operating microswitches for the controlled loads, One cam switch enables the motor to operate through a preprogrammed cycle and to, turn off at the end of a cycle whenever the thermal switch indicates the power demand has dropped below the predetermined value.
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 August 21, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 21, 1996.
- 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.