Abstract: The glow plug comprises a main body (10) inside which there is attached a heating unit (13), a vaporizing chamber (18) and a mixing chamber (32) for mixing flowing air (A) with vaporized fuel supplied via a conduit (19) through a filter (20) and a calibrated conduit (21). A socket (30) is attached to the end of the main body (10), said socket being traversed by a transverse pipe (31) preferably in the shape of a Venturi tube with the narrowed central portion forming the mixing chamber (32) and being located at the level of an end portion of the heating unit (13).

Abstract: To alert users of Citizen-Band (CB) radios of an emergency situation, a CB transceiver has a tone generator associated therewith generating an emergency signal, for example a high pitched tone. Upon operation of an emergency switch, the transceiver is placed in the "transmit" mode, and the channels thereof are selectively stepped through for transmission, each one of the channels being modulated by the emergency high pitched tone signal generated in the emergency tone generator; the transceiver, finally, reaches a predetermined channel, for example channel 9, reserved for emergency communication and is thereupon switched to receiving mode. The emergency switch can be incorporated as part of an impact switch in a motor vehicle, thereby sending out the emergency signal, automatically, upon collision, and alerting other users of CB equipment that an emergency exists, regardless of the channels on which the other users may be operating.