Rotary line switch
CA 1330100 C · Owner: Huang, Chin-Hwa · Inventors: Huang, Chin-Hwa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved rotary line switch characterized by comprising an upper cover, a lower cover with trapezoid blocks and mushroom blocks on the internal walls a contact, strip fixed to the mushroom block at one end of the lower cover, an inverted U shaped catch-contact strip having a catch end and a contact end and fixed to the mushroom block at the other end of the lower cover a control, consisting of a knob and a lower ratchet wheel and an upper ratchet wheel with four teeth each, and a special screw having a journal for the control to fit on and used to put the upper and lower cover together, and being constructed in such way that the S shaped end of the contact strip engages with the tooth of …
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 7, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2011.
- 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.