Programmable light activated timing device
CA 1090449 A · Owner: P.R. Mallory & Co. Inc. · Inventors: Pomerantz, Daniel I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A programmable timing device for an appliance and the like includes a plurality of elements each having substantially opaque and transparent portions for precluding and permitting the passage of light respectively a mechanism for, rotating at least three of the elements in substantially dissimilar cycles, at least two light sources wherein each light source is masked by an opaque portion of at least one of the elements and each light source is at least periodically exposed by another element through a transparent portion of the one element in a programmed sequence of at least two time intervals, and an actuator responsive to each exposed light source for actuating a machine function of the …
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 November 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 1997.
- 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.