Abstract: An individual room energy control system for selectively disconnecting and connecting electrical load means associated with a room to and from an electrical power source where the system includes a room status switch having room occupied and unoccupied positions located at a room status station for disconnecting the load means with the power means and a manually operated service switch in the individual room which may override the status switch when it is in a room unoccupied position whereby the load may be reconnected to the power source. The service switch may be incorporated in a telephone which in turn is included in a room status circuit to indicate when a room is unoccupied whereby a maid on entering a room for service may connect the load to the power source while she is in the room by operating the telephone.

Abstract: A telephone signalling system having means for selectively disconnecting a telephone from a substation and connecting it to a message control unit including non-interrupt means responsive to current in the telephone wires when the telephone is in use for preventing disconnection of the telephone from the substation. Emergency override means are provided for disconnecting the telephone from the substation and connecting the telephone to the message control unit during an emergency irrespective of the telephone being in use.The telephone signalling system in addition has means responsive to a test scanning signal to indicate proper connection of the telephone when it is connected to the message control unit.

Abstract: A telephone operated signalling system for use with a telephone having a manually operated switch and which is connected to a telephone substation where the system has room status indicating means responsive to operation of the manually operated switch, and means for disconnecting the telephone from the substation and connecting it to the signalling system. Indicator switch means are positioned between power means energizing the indicating means whereby the indicating means may be deenergized during long periods of time that the telephone is connected to the signalling system. A circuit is connected to the substation when the telephone is disconnected therefrom to provide means for preventing any malfunction signal caused by any test scanning current applied to the substation to indicate that the telephone is disconnected from the substation. Holding means are provided for holding the indicating means in a set position regardless of any power interruption in the signalling system.