A manually operated device in which the act of pulling a lever causes the transmission of not less than three rounds of coded alarm signals. Similar to the noncoded type, except that instead of a manually operated switch, a mechanism to rotate a code wheel is utilized. Rotation of the code wheel, in turn, causes an electrical circuit to be alternately opened and closed, or closed and opened, thus sounding a coded alarm that identifies the location of the box. The code wheel is cut for the individual code to be transmitted by the device and can operate by clockwork or by an electric motor. Clockwork transmitters can be prewound or can be wound by the pulling of the alarm lever. Usually the box is designed to repeat its code four times and automatically come to rest. rewound transmitters must sound a trouble signal when they require rewinding. Solid state electronic coding devices are also used in conjunction with the fire alarm control unit to produce coded sounding of the audible signaling appliances