Patent ID: 8305209
Filing Date: 2012-11-06
Classification: G08B

Abstract:
1. An alarm device, comprising: a status detection section; a status judgment section for judging a status based on a signal output from the status detection section; a control section for causing an alarm to be output based on a result of the judging made by the status judgment section; and a transmitting/receiving section for transmitting and receiving a status signal to and from another alarm device, wherein: the transmitting/receiving section transmits the status signal to the another alarm device with a transmission pattern formed by combining n transmission periods, where n is a number greater than or equal to 2, and (n-1) transmission suspension periods alternately between the n transmission periods, and receives the status signal transmitted by the another alarm device in an intermittent constant reception cycle; the n transmission periods are set as having at least two or more types of different time lengths; and 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 transmitted in a second intermittent reception cycle and subsequent intermittent reception cycles.