Head drum assembly
CA 1066405 A · Owner: Sony Corporation · Inventors: Kusaka, Satoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a head drum assembly for a video tape recording and/or reproducing apparatus provided with stationary and rotary drum members for guiding a magnetic tape at their peripheries while video signals are recorded on or reproduced, from the tape by means of a magnetic head or heads carried by the rotary drum member and extending into a gap defined between the peripheral surfaces of the drum members; the rotary drum member, and hence the head or heads carried thereby is driven, by a D.C. motor disposed coaxially in respect to the drum members and having its shaft directly coupled to the rotary drum member, the signals being recorded or reproduced are transmitted by a signal transformer …
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 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 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.