Tamper-proof alarm bell assembly
CA 1196519 A · Owner: Automated Security Holdings Limited · Inventors: Marsh, John C.T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An alarm bell assembly is provided herein the bell assembly, includes a gong and bell operating parts on a mounting the operating, parts being concealed and protected by the gong and preferably also a, cover for the assembly. The bell assembly is secured by means comprising a detector, such as a micro-switch, by which the bell is actuable when the securing means is tampered with. A rechargeable battery is connected to an external control circuit such that the battery remains fully charged and supplies the alarm drive if the control circuit connected is served. Thus the alarm bell is sounded if a prospective burglar or intruder attempts to dismantle the assembly, since the gong and the cover …
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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 November 12, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2002.
- 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.