Abstract: A modulating thermostat for a gas oven includes a body with supply, main and pilot passages. Feeder passages from the supply passage to the main and pilot passages provide a pilot gas flow for a pilot burner and a minimum combustion bypass flow to a main oven burner. The feeder passages are drilled along paths leading from mouths of the main and pilot passages and adjustment sleeves installed at the mouths adjust the gas flows for particular oven and fuel requirements. A temperature modulating valve assembly in the supply passage includes a valve member cooperating with a valve seat in the body to modulate gas flow and maintain an oven temperature set by rotation of a valve stem at the front of the thermostat. The thermostat is calibrated by rotating a sleeve accessible through the hollow stem at the front of the thermostat.

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 thermostatic gas heater which permits the user to mechanically select the number of active heating elements, ranging from one to the total number of heating elements. The thermostat mechanically regulates gas flow to all active heating elements. No electricity is necessary for operation because all control components operate mechanically.

Abstract: An electrically operated line valve has its outlet connected to the inlet of the manifold for supplying the user actuated individual gas burner valves and a user actuated line power switch is closed before opening of any of the burner valves. A valve position detector signals an electronic controller which supplies power to the line switch only if a burner valve has been opened after closing of the line switch. A user actuatable manual override cable enables the line valve to be manually opened during periods of electrical power outage.

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 and method of making the same are provided, the device comprising a housing carrying a thermostatically operated valve member mounted on an axially movable shaft that has an annular flat shoulder normally engaged by a substantially flat side of the valve member under the urging force of a spring, the valve member having a first opening that defines a generally continuous cylindrical surface on the valve member that faces the shaft in a telescoping relation therewith and that is substantially transverse to the flat side thereof, the valve member having a second opening that is disposed outboard of the first opening and that cooperates with the main valve seat of the housing to provide at least part of a by-pass flow of fuel when the valve member is closed against the valve seat.

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: An electronic oven temperature regulator employing a comparator to control energization of a relay for cycling the oven heating unit (gas or electric) in response to comparison of an oven temperature sensor output and a user selected reference temperature about which regulation is desired. A reversible polarity voltage regulator provides feedback from the comparator output to the input to provide a positive and negative hysteresis dead band about the selected regulation temperature for minimizing cycling or "hunting" of the heating unit. A fault comparator tracks the selected reference temperature to disable the heating element relay in the event of a short in the temperature sensor.

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 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 thermostat assembly for a gas fired oven including an integral control valve having a rotatable tapered valve member with axially spaced valving grooves, separately valving fuel gas flow to the standing pilot and main burner lines from separate inlet ports in a tapered bore in the valve block. In the "OFF" and "PILOT" valve positions, fuel gas is permitted to flow only to the pilot burner line. In the range of "ON" position, fuel gas is permitted to flow to both the main burner and pilot lines. Rotation of valve to any of the "ON" positions varies the setting of a thermostat which responds to ambient temperature to substantially reduce main burner flow when a desired ambient temperature has been reached.

Abstract: A unitary assembly includes a thermostatically controlled valve and an electric switch coupled for operation therewith. Both the valve and the electric switch are operated under the control of a thermostatic actuator which effectuates operation through a snap acting member movable between alternate stable positions. Neither the valve nor the electrical switch can dwell at the threshold of actuation, but rather are positively actuated to either an open or closed position when the snap acting member moves to one of its stable positions, and to an opposite condition when the snap acting member moves to its alternate stable position. The movement of the thermostatic actuator can be adjustably multiplied by a lever arrangement in the valve housing. The movement of the snap acting member can also be multiplied by an internal arrangement employing a lever ring with radially inwardly directed cantilevered lever arms.

Abstract: A switching and control apparatus, comprising: a stepping switch with a rotatable controller barrel; a regulator having a rotatable setting shaft drivable by the controller barrel; a clutch, including a regulator-side coupling member fixed for rotation together with the setting shaft, effective over a predetermined range of angular regulator settings, in which the controller barrel drives the setting shaft, and ineffective at angular settings beyond the predetermined range, during which the setting shaft is not driven by the controller barrel; and, a spring-loaded arrangement for restraining rotational movement of the regulator-side coupling member during movement of the controller barrel beyond the predetermined angular range.

Abstract: An oven having an electrical resistance heater and a heat exchanger to maintain a constant temperature in an oven chamber cavity. The heat exchanger is internal to the body of the oven and adjacent to the oven chamber cavity. Air is the exchange medium in the heat exchanger to achieve a balanced, cooling effect through direct air exhaust and also to achieve zero environment effect. An inert gas may be introduced into the oven chamber cavity during the heating process to reduce oxidation. Outside air may also be introduced into the oven during the heating process. Electrical circuitry provides for controlling the temperature range of the oven, for generating a signal for servo motor control of a damper in the heat exchanger, and a high limit temperature controller to disable the electrical resistance heater when an over temperature condition is reached.

Abstract: A fuel control device having a passage therethrough for interconnecting a fuel source with a main burner and having a poppet valve arrangement that is directly manually operated for opening and closing the passage so as to control the flow of fuel from the source to the main burner, the poppet valve arrangement having a poppet valve member that is moved relative to its valve seat upon the manual manipulation of a selector of the control device. The poppet valve member can work with the pressure of the fuel from the source thereof when the poppet valve member is being moved to its closed position.

Abstract: A thermostatic gas valve includes a thermostatic valve for regulating the temperature of a burner and a manually operable valve for regulating the flame height. The operation of the manual and thermostatic valves is controlled by a stem. The valve includes a shaft coupled to the stem that is axially movable from an off position to a first position. In the first position the shaft is rotated to rotate the manual valve. The shaft may then be axially moved to a second position and rotated to rotate the thermostatic valve to the desired position. The shaft is locked in a first non-rotatable position and prevented from being axially moved by a locking element.

Abstract: A control for cooking ovens having bake and broil burners is disclosed which includes a support base, three switches supported by the base which are electrically connected in controlling circuits for the burners, a manually operable selector mechanism for selecting desired oven functions and oven temperature levels, a thermostatic actuator which coacts with first and second of the switches and the selector mechanism to govern burner operation in response to sensed temperature levels, and an oven function control actuator which coacts with a plurality of the switches and the selector mechanism for enabling operation of the selected burners.The selector mechanism includes an operating member which is supported by the base for rotation about an axis by a control knob or dial. The function control actuator includes a cam member supported for rotation by the operating member and a cam blade supported for rotation by the cam member as well as for tipping or rocking motion by the cam member.

Abstract: A fuel control system having a temperature responsive control device for thermostatically controlling the flow of fuel from a source thereof to a burner and having an adjustable by-pass means by-passing the temperature responsive valve of the device for providing a by-pass flow of fuel from the source to the burner to sustain combustion at the burner, the by-pass means comprising a tubular member provided with an inlet and an outlet for respectively being interconnected to the source and to the burner. The tubular member has a passage therein interconnecting the inlet to the outlet and carries an adjusting member for adjusting the rate of flow of fuel through the passage between the inlet and the outlet of the tubular member and, thus, the amount of fuel being by-passed to the burner. The tubular member has means for interconnecting the source to a pilot burner independent of the passage thereof.

Abstract: A hot blast type oven comprising an outer casing defining a heating chamber adapted to receive foodstuff to be cooked and having a front door for opening and closing the heating chamber. A main burner serves for producing hot gases sent to the heating chamber by a blower. A gas control section including an operation handle controls the supply of gas to the main burner and to a pilot burner adjacent thereto. An electrical control section serves for controlling the main blower and an ignition device for the pilot burner. The gas control section and the electrical control section are constituted as respective units coupled together and detachably mounted for mutual operation. The control sections are operated in accordance with movement of the door such that the operation handle is locked when the door is closed and lighting of the pilot burner can be achieved only by opening the door and displacing the operation handle.

Abstract: A fuel control device having a passage therethrough for interconnecting a fuel source with a main burner and having a poppet valve arrangement that is directly manually operated for opening and closing the passage so as to control the flow of fuel from the source to the main burner, the poppet valve arrangement having a poppet valve member that is moved relative to its valve seat upon the manual manipulation of a selector of the control device. The poppet valve member can work with or against the pressure of the fuel from the source thereof when the poppet valve member is being moved to its closed position.

Abstract: An oven fueling system providing a chamber for food products exposed to at least one assembly of ribbon burners for heating the chamber atmosphere. An air heater is provided for transmitting pre-heated air through a conduit to a mixer aspirator leading to the header of the assembly. An oil line connects with the conduit upstream of the aspirator mixer for supplying oil to be injected into the preheated air passing through and a gas line communicates with the conduit for supplying gas to the conduit selectively with the oil line supply. Valves thus isolate both the oil line and the gas line selectively. Additionally a sensor is provided for sensing the temperature of the assembly and a control is provided for preventing the valve at the gas line from opening until a predetermined burner assembly temperature is reached. The valve for the oil line is prevented from being opened until the temperature of the chamber is such that the oil will vaporize satisfactorily.

Abstract: A fuel control device having a passage therethrough for interconnecting a fuel source with a main burner and having a poppet valve arrangement that is directly manually operated for opening and closing the passage so as to control the flow of fuel from the source to the main burner, the poppet valve arrangement having a poppet valve member that is moved relative to its valve seat upon the manual manipulation of a selector of the control device. The poppet valve member can work with or against the pressure of the fuel from the source thereof when the poppet valve member is being moved to its closed position.

Abstract: A fuel control device having a passage therethrough for interconnecting a fuel source with a main burner and having a poppet valve arrangement that is directly manually operated for opening and closing the passage so as to control the flow of fuel from the source to the main burner, the poppet valve arrangement having a poppet valve member that is moved relative to its valve seat upon the manual manipulation of a selector of the control device. The poppet valve member can work with or against the pressure of the fuel from the source thereof when the poppet valve member is being moved to its closed position.

Abstract: A fuel control system for a main burner having a dual rate pilot burner and a control device for providing a standby flame flow of fuel to the pilot burner when the output temperature effect of the main burner is above the temperature setting of the control device and for providing a large heater flame flow of fuel to the pilot burner when the output temperature effect of the main burner is below the temperature setting of the control device so that only the heater flame will cause a main flow of fuel to the main burner for a heating operation thereof. A diverter valve is provided for diverting the heater flame flow of fuel from the dual rate pilot burner to another pilot burner so that the main flow of fuel to the main burner will cease even though the output temperature effect of the main burner is below the temperature setting of the control device, the diverter valve being controlled by a timer or the like to provide a "cook and hold" feature of the system.

Abstract: Fuel flow to a gas oven burner is controlled by a manual rotary valve and a series flow arranged, electrically operated valve and is ignited by a ceramic glow igniter. The electrically operated valve and glow coil are series connected across a power source through a manual line switch and an adjustable temperature responsive switching means. A control knob, when rotated, rotates the manual rotary valve, actuates the line switch, and adjusts the temperature responsive switching means.

Abstract: A fuel control device having a passage therethrough for interconnecting a fuel source with a main burner and having a poppet valve arrangement that is directly manually operated for opening and closing the passage so as to control the flow of fuel from the source to the main burner, the poppet valve arrangement having a poppet valve member that is moved relative to its valve seat upon the manual manipulation of a selector of the control device. The selector locks with the control device in the "off" position and the control device has a long and gradual cam surface to permit the selector to be moved to its locked "off" position without excessive "feel".

Abstract: An oven burner control system having a manual rotary valve controlling gas flow to main and pilot burners and a solenoid operated valve controlling flow to the main burner, control circuit means embodying spark ignition means to ignite the pilot, means responsive to conduction through pilot flame to cut off spark ignition and permit operation of the solenoid valve, and variable resistance means responsive to oven temperature effecting cyclic operation of the solenoid valve. A control knob rotating with the manual valve varies the control point of said temperature variable resistance means and actuates a line switch to connect and disconnect the control circuit with a power source.

Abstract: An oven having an air inlet opening in its lower region and an exhaust opening in its upper region, and at least one gas-fueled burner within the oven, one of the openings containing a baffle variably movable into and out of closing relation to the opening in response to heat-sensitive actuating means whereby control of stack action within the oven is achieved so that proper air supply to the burner is permitted while simultaneously obtaining decreased heat loss through stack action.