Abstract: The thermostatic gas valve comprises a body (2) wherein three cylindrical cavities of parallel axes (8,9,10) contain the flow valves (6,20,13,14) and a thermostatic bellows (11), a single rotating knob (7) having a cap (7a) and an inner cylindrical member (7b) with relative axial movement, and four chambers (30,31,32,33) communicating a respective valve with the two pairs of gas inlets (34,34') and outlets (35,35') located for access thereto from the front of the valve. The guide means (23,40) for the central shaft (8') of the knob (7) are combined with the guide means (15a,15b,15c,41) for the body cover (15) located underneath the knob (7), to find its different angular positions. The obturators of the minimum and proportional gas flows are formed in a single piece by two integral parts.

Abstract: A control device and method of making the same are provided, the control device having an axially movable shaft for moving a movable valve into its latching position with an electromagnetic unit and also being rotatable from a first position thereof to a second position thereof to cause an electrical switch to be in a closed condition thereof, the switch being a normally closed switch and being in series with the electromagnetic unit so that the electromagnetic unit can not have an electrical current flowing therethrough unless the switch is in the closed condition thereof.

Abstract: A control system, a control device therefor and methods of making the same are provided, the control device having an axially movable shaft for moving a movable valve into its latching position with an electromagnetic unit and also being rotatable from a first position thereof to a second position thereof to place and hold an electrical switch in an operating condition thereof, the switch being in series with the electromagnetic unit so that the electromagnetic unit can not have an electrical current flowing therethrough unless the switch is in the operating condition thereof.

Abstract: A liquid immersible electronic aquastat in which a temperature responsive element and substantially all associated electronic circuitry are arranged on a circuit board within a tubular capsule of liquid impervious material closed at one end and having a external diameter not exceeding 3/8ths of an inch so as to be interchangeable with industry standard aquastat temperature sensor mounting hardware and fittings.

Abstract: A control system, a control device therefor and methods of making the same are provided, the control device having an axially movable shaft for moving a movable valve into its latching position with an electromagnetic unit and also being rotatable from a first position thereof to a second position thereof to place and hold an electrical switch in an operating condition thereof, the switch being in series with the electromagnetic unit so that the electromagnetic unit can not have an electrical current flowing therethrough unless the switch is in the operating condition thereof.

Abstract: A fuel control device, system using the device and method of making the same are provided, the device comprising a housing having an inlet for being interconnected with a fuel source and an outlet for being interconnected to a main burner, the housing having a main valve seat between the inlet and the outlet and a thermostatically operated valve member for opening and closing the main valve seat, the housing having an annular heater pilot valve seat surrounding the main valve seat and being opened and closed by the thermostatically operated valve member at the same time that the thermostatically operated valve member is opening and closing the main valve seat, the housing having an annular auxiliary fuel supply valve seat surrounding the heater pilot valve seat and being adapted to be opened and closed by the thermostatically operated valve member at the same time that the thermostatically operated valve member is opening and closing the main valve seat and the heater pilot valve seat, the housing having a pa

Abstract: A control device for supplying fuel to a burner means, a system therefor and methods of making the same are provided, the device comprising a housing having an inlet for being interconnected to a source of fuel and having an outlet for being interconnected to the burner, first and second control valves carried by the housing and being in series to connect the inlet to the outlet only when both of the control valves are in an open condition thereof, each control valve comprising a movable valve member resiliently biased closed and an independent electromagnetic valve member latching unit energizable to hold its respective valve member open and deenergizable to allow its respective valve member to close, each control valve having a movable member to open its respective valve member to a latching position so as to be held open by its respective latching unit when its respective latching unit is energized, and a single manually movable actuator carried by the housing and having structure operatively interconnecti

Abstract: A catalytic gas burner, as used e.g. in a mobile space heater, comprises a valve housing divided by at least two poppet valves into three or more cascaded chambers. One chamber communicates with a gas inlet and is normally closed by a first poppet valve which can be opened by a push rod and held open by an electromagnet, the latter being energized under the control of a thermocouple as long as an adjoining ancillary nozzle emits a monitoring flame. This nozzle communicates with another chamber to which gas is admitted in the open state of the first poppet valve and which also feeds the main nozzle head of the burner through a supply conduit including a manually and/or thermally controlled flow regulator. A second poppet valve, fixed to the push rod, is open as long as that rod is depressed against a spring force to give access to a further chamber from which supplemental gas is conveyed through another conduit to the nozzle head during a start-up phase while an igniter is being actuated.