Means for automatic ambient temperature control

Claim 1

An automatic comfort control system for use in hotel or motel rooms having an entry door and a comfort conditioning system such as a heating and/or air conditioning system, comprising: a first temperature responsive switch means positioned in the room and selectively settable at a minimally acceptable operating temperature; a second temperature responsive switch means positioned in the room and selectively settable at an ideal operating temperature, said minimally acceptable operating temperature being such as to achieve energy savings as compared to said ideal operating temperature; a door chain unit secured to the inside of a door closing the room, the unit including an elongated groove open at one end and closed at the other end, and having adjacent the closed end a magnetically actuatable switch; a door lock chain having one end attached to a wall in the room adjacent the door; a magnet affixed to the other end of said chain, and having a knob thereto slideable in said groove whereby said knob may be positioned in said groove to lock the door and when in locked position the magnet is adjacent to and actuates said switch in said door chain unit; and conductors connecting said first and second temperature responsive switches and said magnetically actuatable switch with the comfort/conditioning system for the room and arranged such that when said magnet housing affixed to said chain is positioned with said knob in said groove said magnet actuates said switch to connect said second thermostat to control the comfort conditioning system, and when said knob is not in said groove, said switch is therby not subject to said magnet and said first thermostat is connected to control said comfort conditioning system.