The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2012
Filed:
Mar. 16, 2009
Tomohiro Katou, Tokyo, JP;
Takashi Itou, Tokyo, JP;
Kenichi Katou, Tokyo, JP;
Nohmi Bosai Ltd., Tokyo, JP;
Abstract
A combination smoke and heat detector which allows, in spite of a simple structure, light emitted from an indication lamp to be visually confirmed from a wide range of directions. The combination smoke and heat detector () includes a body base (), a printed circuit board (), a thermosensitive element (), a dark chamber (), an indication lamp () mounted to the printed circuit board (), a protective cover (), and a bar-like light guide () for guiding light emitted from the indication lamp () to the outside of the protective cover (). The light guide () passes through a light guide through-hole () formed in the protective cover () so as to be mounted therein, with one end surface thereof facing the indication lamp (), and another end surface thereof protruding to the outside of the protective cover () by a height substantially equal to or larger than a protruding height of the dark chamber (). Further, the light guide () is arranged opposite relative to the thermosensitive element (), with the dark chamber () being sandwiched therebetween.