seat by snapping directly against the valve seat when sensing a certain temperature and opening the valve seat by snapping away from the valve seat when sensing another temperature the bimetallic snap disc is held by an adjacent magnet member so that the bimetallic snap disc is held so as to be able to operate surely and completely and the valve construction can be assembled in easy manner application_number US 87384678 A description referring now to fig1 there is shown a temperature responsive valve construction generally designated by numeral 10 the temperature responsive valve constructionn 10 comprises a cup shaped housing 12 made of a heat conductive material for example a brass material having an open end 14 and a closed end 16 and a valve body 18 sealingly secured in the housing 12 to define a chamber 20 between an inner wall of the housing 12 and a right end surface 30 of the valve body 18 the housing 12 is provided with a screw portion 22 at its outer periphery for being threaded into for example a water jacket not shown of an internal combustion engine of a motor vehicle in order to sense the change of the fluid temperature therein the valve body 18 includes an inlet passage 24 and an outlet passage 26 with the inlet and outlet passages 24 and 26 respectively being disposed in fluid communication with the chamber 20 one end of the outlet passage 26 is connected to a vacuum spark advance part 111 of a conventional carburetor 110 through a conduit 130 and a conduit 131 and also.