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:
Nov. 06, 2012
Filed:
Dec. 02, 2009
Hidesato Morita, Tokyo, JP;
Makoto Masuyama, Tokyo, JP;
Toshimitsu Watanabe, Tokyo, JP;
Nohmi Bosai Ltd., Tokyo, JP;
Abstract
Provided is an alarm device capable of performing transmission and reception reliably while suppressing an amount of current consumption. An alarm device () includes: a fire detection circuit (); a control circuit (); and a transmitting/receiving circuit (). The transmitting/receiving circuit () transmits the status signal to the another alarm device () with a transmission pattern formed by combining transmission periods and transmission suspension periods a predetermined number of times, and receives the status signal transmitted by the another alarm device () in an intermittent reception cycle. A time length of each of the transmission periods and the transmission suspension periods is set so that the another alarm device () that has failed to receive the status signal transmitted in a first intermittent reception cycle can receive the status signal in a second intermittent reception cycle and subsequent intermittent reception cycles.