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Expired Canadian patentCanada

Shutter latch system with automatic release for shock damping member

CA 1082512 A · Owner: Polaroid Corporation · Inventors: Coughlan, Edward H.; Whiteside, George D.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

This invention relates to an improvement to a photographic camera of the type having an automatic shutter latch mechanism which may be released in response to initial shutter blade movement resulting from energization of the shutter drive means and which may thereafter be moved into position to accommodate relatching of the shutter blades in response to film advancement. The shutter latch mechanism additionally includes a shock stabilizing arrangement to inhibit the accidental unlatching of the shutter blade mechanism resulting from shutter blade movement occassioned through extraneous vibration sudden, shock, or otherwise. The improvement resides in the automatic shutter latch mechanism …

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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 July 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 12, 1977
GrantedJuly 29, 1980
Term endedJuly 29, 1997
Patent numberCA 1082512 A
Classification (IPC)G03B7/14 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJan 12, 1977Patent grantedJuly 29, 1980Term endedJuly 29, 1997

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.