Thread winding safety device of a sewing machine
CA 1255159 A · Owner: Janome Sewing Machine Co. Ltd. · Inventors: Hyodo, Tohru; Kakubari, Toru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the invention the sewing machine carries out winding of the thread by operating separately a thread winding mechanism and a clutch mechanism. A speed detector provided to a mechanism is relative with rotation of an upper shaft. If the thread winding were carried out t while said mechanism is left as engaged with a power source of the sewing machine the speed, detector would detect the rotation of said relative mechanism to stop a machine motor instantaneously, so that the thread winding cannot be performed when said relative mechanism is not released from the power source, and the needle bar is not actuated at winding the thread for safety in operation.
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 June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- 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.