Abstract: A device which automatically decreases the audio output of an audio system while a telephone is being used. The device includes sensor and control means, relay means, mode selection means and attenuation means. When the handset is removed from its cradle on a conventional telephone, an electrical signal is produced. The sensor and control means detects this signal and causes the relay means to interact with the attenuation means to effectuate a predetermined decrease in the audio output level of the audio system. The device automatically restores the audio output to its previous level upon the handset being returned to its normal position on the telephone cradle. The device's mode selection means enables one to operate the device in either an automatic mode, an attenuate mode or in a bypass (i.e., off) mode.

Abstract: An electrical power receptacle includes a cover for receipt of power prongs, behind which is located a pair of electric power terminals. A lockout means having a pair of slots therein is located interposed between the cover of the receptacle and the pair of electric power terminals. The lockout means is rotatable between a closed position wherein said lockout means occludes at least one of the slots in the cover to prevent the prongs of the plug from being inserted therein and an open position wherein the slots in the lockout means align with the slots in the cover to enable the prongs of the plug to be inserted therethrough and into electrical communication with the power terminals. A switch is coupled to the lockout means and provides a first electrical signal whenever the lockout means is in the closed position or when the lockout means is in the open position with a plug's prongs inserted within the slots of the receptacle.