Locking mechanism
CA 1135522 A · Owner: Zeiss Ikon A.G. · Inventors: Tietz, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flat key has laterally projecting ribs which extend along the key and which are adapted to enter slots in the key hole of a lock. The slots communicate with bores which receive locking pins which are pushed outwardly when engaged by the ribs. When not engaged by ribs of correct height or in the absence of ribs the locking pins are not pushed out to the extremities of the bores, thus leaving recesses into which a housing pin falls to prevent rotation of the central cylindrical part of the lock. According to the invention two additional ribs are provided which are provided with spaced discontinuities or depressions. The lock is provided with security pins in addition to the locking pins and …
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 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
- 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.