Patent ID: 7295102

Claim:
An alarm system that receives, by means of a receiver, an alarm reversal signal from a transmitter in accordance with operation of an operation member, and alternately activates and deactivates an alarm in response to the received alarm reversal signal, comprising: a transmission controller disposed on said transmitter side for transmitting a preceding alarm reversal signal to said receiver when said operation member is operated in a first operation mode in an initial condition thereof to activate an alarm and to set an operation mode to a second operation mode, and for transmitting a succeeding alarm reversal signal, identical to the preceding alarm reversal signal, to said receiver when said operation member is operated in said second operation mode before a prescribed time period expires after transmission of said preceding alarm reversal signal to deactivate the alarm and to reset the operating mode to the first operating mode; and a reception controller disposed on said receiver side for activating an alarm upon receipt of said preceding alarm reversal signal and for deactivating said alarm upon receipt of said succeeding alarm reversal signal while said alarm is ON.