GB190804261A - Improvements in Apparatus for Automatically Controlling the Temperature in Buildings and other Places. - Google Patents

Abstract

4261. Marks, E. C. R., [National Regulator Co.]. Feb. 25. Controlling automatically air for, treated by heating; valves.-In apparatus for controlling the temperature in buildings, in which a fluid-pressure motor 7 regulates dampers 8, 9 admitting hot and cold air to a room the supply of fluid is controlled by a thermostat 2, in such a way that the movement of the motor is retarded or accelerated. The pressure of the fluid in a supply pipe 4 tending to open a valve 20 is balanced by the back pressure in the thermostat, and by the tension of a spring 19. A rise of temperature diminishes the tension of the spring, and allows the fluid to open the valve and pass to the motor, thereby closing the damper of the hotair chamber. At the same time the back pressure in the thermostat is increased and assists the spring 19 in closing the outlet of the supply pipe 4. In this way a vibrating action is set up, and the movement of the motor is retarded. Similarly by reversing the connexions the movement of the motor may be accelerated. In a modified system, the two pipes 4, 6 are replaced by a single pipe, a restriction being formed in the pipe leading from the tank, and the outlet pipe of the thermostat opens to the atmosphere.