Position responsive switch
CA 1110303 A · Owner: Singer Company (The) · Inventors: Lauritsen, Richard L.; Philbrick, Richard S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The plastic non-conducting housing is provided with two pairs of terminals the inner ends of which serve as busses and fit in grooves in the interior each pair being separated by an integral rib which is slightly higher than the busses so the associated spring loaded roller-like shorting bar mounted in the axially moveable carrier is held out of contact with the busses. The molded housing is cored along the length of the rib where switching is desired. Therefore, where the housing is cored there is no rib to prevent the shorting bar from completing the circuit between the busses. When the shorting bar engages the busses the friction between the loading spring and the knurled central section …
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 October 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 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
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.