Air operated clock
CA 1136865 A · Owner: Bremer, Edgar W. · Inventors: Bremer, Edgar W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for connection to a periodic pulsed air supply for, providing an indication of time based on receipt of the air pulses comprises a rotor having an externally visible pointer. The rotor is mounted in a cylindrical housing and includes a first section which moves axially of the housing under the force of an air pulse. Teeth are formed on the rotor first section which coact with stationary teeth mounted on the housing interior to force the rotor first section to rotate a predetermined amount. This rotation is transmitted to a second axially stationary rotor section by a keyed connection between the rotor sections. The axially movable section is forced to its original position by a …
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 December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 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.