Fire detector

G - Physics – 08 – B

Patent

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Details

358/21, 340/140.

G08B 17/10 (2006.01) G08B 17/00 (2006.01)

Patent

CA 1267708

ABSTRACT OF THE DISCLOSURE A fire detector having a body comprising a cover part and a hood part and containing therein fire detecting means and electrical circuits, and a base detachably fastening the body by engaging means provided on them, respectively, is disclosed wherein in order to prevent the cover part from coming off the hood part due to shock, vibration, etc. possibly subjected thereto at the time of maintenance, inspection, etc. of the detector the cover part is provided on its upper surface with a plurality of vertically projecting posts each having at its upper end a hook member, the hood part being provided on its top wall with a corresponding number of openings each having an engaging portion formed at a part of the upper edge portion of the radially inner peripheral wall to be engaged by the hook members, respectively, and a corresponding number of grooves are provided in the upper surface of the top wall each in communication with a gap formed between radially outer walls of the grooves and the radially outer surface of the projecting post when the hook member engages the engaging portion, and a corresponding number of shifting members are provided on the under surface of the base which are adapted to be shiftably received in the grooves, respectively, to reach the respective gaps formed between the outer peripheral walls of the grooves and the radially outer surfaces of the posts when the engaging means provided in the body engage the engaging means provided in the base.

529581

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