Abstract: A manually resettable thermostat has several individual resettable thermostats which have respective calibration temperature, stacked one above the other and formed as an integral assembly. The thermostat may be utilized in the thermostatic system that need several different manually resettable thermostats with different calibration temperatures so the space of the system is saved and the operation of the thermostat is simplified.

Abstract: In a space thermostat having a control lever for setting the temperature set-point, a force producing means clamps the control lever to the thermostat casing through an elongated slot in the casing. A hollow, rigid thin-walled nut, a compressible anchor ring, and a screw cooperate to provide means for adjusting the value of the clamping force to a value which enables manual movement of the control lever, upon application thereto of a desired force, to a different temperature set-point. The clamping force is further adjustable to a value which prevents manual movement of the control lever when it is desired to provide a locked condition wherein the control lever cannot be manually moved.

Abstract: Efficiency of domestic heating systems is improved by a flue temperature responsive switch for intermittently shutting down the burner when temperature conditions are such as would cause extended operation of the burner in the absence of the switch. The temperature at which shut-down occurs is adjustable, and the temperature at which burner operation is reestablished is dependent on the shut-down temperature. However, the minimum temperature at which burner operation is reestablished by the switch is fixed at the time of installation of the switch by securing a control knob having a stop at a selected position on a control shaft which adjusts the shut-down temperature. The switch contacts are constructed so that the switch closes if any of its principal movable parts fail.

Abstract: The invention relates to a timing pulse generating switch assembly, particularly for the monitoring circuit of an oil or gas furnace, having at least one snap switch provided with a contact arm which carries the movable contact. The movable contact arm is fixed with respect to the housing at one end and there is provided a snap system which adjusts the contact arm. The snap system possesses a snap arm which is fixed with respect to the housing at one end and is preferably formed by the contact arm. The snap system includes a snap spring which is articulated to the snap arm and, at its other end, is articulated to a slide that is reciprocatable by a bimetallic member. The switch assembly includes and is influenced by a locking element that is actuated by separate means such as the armature of a relay. The locking element functions to block the movable contact in its rest position as well as in its operating position by using a blocking member which is carried along by the slide.