Control apparatus and system for closely spaced heating elements for forming glass fibers and method of using same
CA 1096626 A · Owner: Ppg Industries, Inc. · Inventors: Jensen, Thomas H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thomas H. Jensen, Abstract of the Disclosure In an electrical heating element apparatus and control system for tubular glass fiber bushings wherein a plurality of bushings are each individually temperature controlled by a compact power supply and control system and means are provided for mounting and holding the orifice tube fiber units in proper relationship while at the same time, providing the required electrical connection to them. The heating elements or the orifice tubes are connected in parallel across the secondary of a single transformer, and individual control elements are connected in series with each element on the secondary side of the transformer. A special fluid control …
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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 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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
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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.