Abstract: Disclosed is a microwave oven comprising a main casing, a cavity casing combined to the main casing so as to form a cooking compartment and having opposite side walls and a bottom plate, and a tray rotatably seated on the bottom plate of the cavity casing, the bottom plate of the cavity casing comprising a tray seating part for seating the tray on the center thereof; and an elevated part protruded upwardly around the tray seating part. With this configuration, the present invention provides a microwave oven which can increase the amount of food accommodated therein.

Abstract: A microwave oven is provide, which is capable of steaming food and cooking food by direct-irradiation of microwaves at a same time, and is capable of keeping a cooking cavity clean. A water container is arranged at an upper portion of the cooking cavity to generate steam from water contained in the water container when the water is heated by the microwaves. A water supplying guide and a steaming container are arranged at an upper portion of the housing. The steaming container comprises a body and a lid. A food supporting tray with a plurality of steam holes formed therethrough is placed in the body of the steaming container such that the food to be cooked is placed on the food supporting tray. Steam holes formed on a bottom surface of the body are bored in lugs upwardly projected from the bottom surface, and are arranged so as to be eccentric from the plurality of steam holes of the food supporting tray.

Abstract: A high-frequency heating apparatus capable of simultaneously heating different kinds of objects to appropriate temperatures includes: a power feed portion provided on a right side wall forming a heating chamber; a mounting table on which to mount objects to be heated; a rotating support of an improved structure; a drive motor; a temperature detection means having an area in front of the power feed portion as a detection area; and a control means; wherein high-frequency radiation variations are formed by the power feed portion and the rotating support and, based on a signal from the temperature detection means, the control means identifies positions of the objects on the mounting table and controls the drive motor to move the lower-temperature object to where a high-frequency radiation is strong to eliminate insufficient heating of the object and to simultaneously heat a plurality of objects to appropriate temperatures.

Abstract: In one aspect, a microwave oven comprising an outer case, a door secured to the outer case, and a turntable supported in the case but extending beyond a case front face is described. In an example embodiment, the outer case houses a portion of a cooking cavity, and the cooking cavity is partially defined by a bottom inner wall, a top inner wall, and side inner walls of the case. The door is secured to the case, and the door comprises an inner wall comprising a recessed portion. The oven further includes an RF energy source for supplying RF energy to the cooking cavity, a controller coupled to the RF energy source for controlling supply of RF energy to the cooking cavity, and a user interface coupled to the controller.

Abstract: A guide roller, and a cooking tray and a dish for use in a microwave oven are provided with a pad which absorbs high-frequency electromagnetic waves, so as to evenly cook food disposed therein or thereon. The microwave oven includes the pad provided in its cooking chamber to absorb the high-frequency electromagnetic waves. The pad may be attached to the guide roller, the cooking tray, the dish for use in the microwave oven, or any combination thereof. Alternatively, the guide roller, the cooking tray, the dish, or any combination thereof may be made of a material which absorbs the high-frequency electromagnetic waves.

Abstract: Disclosed is a microwave oven comprising a main casing, a cavity casing combined to the main casing so as to form a cooking compartment and having opposite side walls and a bottom plate, and a tray rotatably seated on the bottom plate of the cavity casing, the bottom plate of the cavity casing comprising a tray seating part for seating the tray on the center thereof; and an elevated part protruded upwardly around the tray seating part. With this configuration, the present invention provides a microwave oven which can increase the amount of food accommodated therein.

Abstract: A space saving cooking appliance having a shape that conserves counter space and/or room space with either a prism shaped outer case that has an apex in the rear to match a corner, or a flat back that can be pushed up against a wall. The front of the appliance can be curved forming a part of an ellipse or circle. The cooking space inside the appliance can be cylindrical. On the front of the arcuate surface there can be a door that completes the arcuate surface when it closes, and on its inner side is shaped so that it completes the cylindrical cooking space when it is closed. Auxiliary side appliances can be located left and right of the main cooking area. These auxiliary appliances can be stacked and can be of many different types including a toaster, rotisserie, grill, broiler, BBQ, egg cooker, coffee maker.

Abstract: A microwave oven includes a tray holding unit which stably holds both a cooking tray and a tray guide at their original positions regardless of vibration and impact applied to the cooking tray and/or tray guide. The tray holding unit includes a base part, and elastic blade parts which are formed on both sides of a lower surface of the base part and extend downward from the lower surface while being inclined outward at an angle of inclination. A stop rail is horizontally formed along an inner surface of left and right sidewalls of a cooking cavity of the microwave oven, so as to stop top edges of the base part and allows the blade parts to press down on the cooking tray. Accordingly, the cooking tray and the tray guide are stably held down by the tray holding unit.

Abstract: A device and process to roast green coffee beans using a combination of microwave, conduction, convection, infrared, and latent steam heating. The device is a sealed cartridge that is semi porous and is used in a conventional or purpose built microwave oven. The resultant coffee is more flavorful and uses ½ the energy that conventional roasters use.

Abstract: The microwave oven includes an infrared sensor for detecting the temperature of a food within a heating chamber. The infrared sensor has a field of view within the heating chamber. The infrared sensor is capable of moving the field of view. The food is often placed in the central region of the heating chamber. Therefore, when cooking is started, the field of view of the infrared sensor first scans the central region of the heating chamber.

Abstract: A microwave oven includes openings and microwave dispersing apparatuses which are arranged to align with a magnetron in a row below a cooking cavity so as to reduce the overall size of a waveguide and uniformly reflect high-frequency electromagnetic waves to all regions of the cooking cavity. The center of a first opening is disposed at a downstream location away from the magnetron by a distance corresponding to one of odd numbers times a half-wavelength of a standing wave in the waveguide, while the center of a second opening is disposed at an upstream location which is offset from another distance away from the magnetron corresponding to another one of the odd numbers times the half-wavelength of the standing wave in the waveguide.

Abstract: A microwave oven comprising a usually prismatic cabinet (10) having a bottom wall (11) and a door (20), and defining, internally, a cooking chamber, in which is provided a turntable (40), the upper edge (13) of the cabinet (10) surrounding an opening (14), against which is seated and releasably locked the door (20), said upper edge (13) or said door (20) carrying a control panel (50) for the operation of the microwave oven. The door (20) may be operatively coupled to the turntable (40) so as to vertically displace the latter upon movement of said door (20).

Abstract: In one aspect, a microwave oven comprising an outer case, a door secured to the outer case, and a turntable supported in the case but extending beyond a case front face is described. In an example embodiment, the outer case houses a portion of a cooking cavity, and the cooking cavity is partially defined by a bottom inner wall, a top inner wall, and side inner walls of the case. The door is secured to the case, and the door comprises an inner wall comprising a recessed portion. The oven further includes an RF energy source for supplying RF energy to the cooking cavity, a controller coupled to the RF energy source for controlling supply of RF energy to the cooking cavity, and a user interface coupled to the controller.

Abstract: The invention provides a high-frequency heating apparatus capable of simultaneously heating different kinds of objects to appropriate temperatures.

Abstract: A device for linearly reciprocating a tray in the right and left direction within a heating chamber of a microwave oven is provided. The device includes a rectangular tray for loading thereon a foodstuff to be heated within a heating chamber, a driving motor for generating rotational force, a converting means for converting a rotational motion from the driving motor into a linear reciprocating motion of the tray, and a supporting means mounted between a bottom surface of the heating chamber and the tray for supporting the tray so as to linearly reciprocate the tray. The converting means includes a groove formed in the bottom surface of the tray and has a predetermined length, and a rotating member with an eccentric protrusion formed at an eccentric position and inserted into the groove, and the rotating member is rotated by the driving motor so that the tray can be linearly reciprocated depending on the amount of rotation of the eccentric protrusion.

Abstract: The present invention relates to a device for linearly reciprocating a tray within a heating chamber of a microwave oven in the right and left direction.

Abstract: A combination microwave ventilated hood cooking system including a microwave oven with a cooking cavity; a magnetron for generating microwaves located adjacent the cooking cavity; and cooling fan outside the cooking cavity. The cooking cavity including at least two trays of different shapes and a stirrer for dispersing microwaves in the cooking cavity. A guide is between the stirrer and the cooling fan such that the guide has a downward slope from the cooling fan to the stirrer. During operation of the microwave, the cooling fan creates an air current, which is directed to the stirrer by the guide and drives the stirrer to disperse microwaves in the cooking cavity and direct an air current to cool the magnetron.

Abstract: A driving mechanism for linearly and reciprocatingly moving items in a heating chamber of a microwave oven is provided. The driving mechanism includes a rectangular tray for loading thereon an item to be heated within a heating chamber and a driving motor for generating a rotational force. A cam is provided for converting the rotational motion of the driving motor into a linear and reciprocating motion of the tray. The driving mechanism also includes a roller assembly mounted between the bottom of the heating chamber and the tray, the roller assembly including rollers for supporting the tray so as to linearly and reciprocatingly move the tray. Convex portions are formed on the bottom surface of the heating chamber on which the rollers move, and the tray can move in the vertical direction by means of the rollers passing over the convex portions. By moving the item both horizontally and vertically, the item can be uniformly heated, and the space within the heating chamber can be more efficiently used.

Abstract: A turntable drive mechanism in a cooking oven. A driver unit is arranged outside a cooking chamber for rotationally driving a turntable, and a magnetic coupling is arranged between a revolving shaft of the turntable and another revolving shaft of the driver unit. The magnetic coupling is composed of a first coupling member attached to the revolving shaft of the driver unit and having magnets arranged so as to provide a surrounding of the revolving shaft with magnetic poles of alternately different polarities, and a second coupling member attached to the revolving shaft of the turntable and having magnets arranged so as to provide a surrounding of the revolving shaft with magnetic poles of alternately different polarities. The first and second coupling members face each other with a non-magnetic wall portion defining the cooking chamber being sandwiched therebetween.

Abstract: A data obtaining method for a microwave oven for processing a cooking status of food detected by a sensor into data, including the steps of: detecting data from food for a predetermined time period; calculating a summation of the detected data; and subtracting data about characteristics of the microwave oven which are prestored in the microwave oven from the detected data.

Abstract: A microwave oven is conveniently used even when a vibration and/or shock are applied to a vessel containing food by preventing the vessel from falling down. The microwave oven includes a cabinet having a cooking chamber and a driving chamber, a high frequency generating section for generating high frequency waves and supplying the high frequency waves to the cooking chamber, and a vessel supporting section for supporting a vessel containing food in the cooking chamber so as to prevent the vessel from falling due to a vibration and/or shock. The vessel supporting section includes a supporting member selectively installed to be contacted with a certain inner wall of the cooking chamber, and at least a supporting ring installed at a side of the supporting member for receiving and supporting the vessel.

Abstract: Disclosed is a microwave oven having a tray which is arranged in a cooking chamber and on which a food to be cooked or a vessel having accommodated therein a food to be cooked is placed and a tray driving section which is disposed in a driving chamber for transferring rotating force to the tray. The microwave oven includes a tray supporting unit for preventing the tray from being released from an original installation position. The tray supporting unit includes a first coupling portion which is formed on a driving shaft of the tray driving section, a second coupling portion which is press-fitted around the first coupling portion, and supporting arm portions which extend from the second coupling portion in a radial direction so as to be respectively engaged with an edge of the tray.

Abstract: A microwave oven (1) comprises an oven cavity (3) containing a rotatable turntable (4) for supporting one or more items to be heated. A radiant electric heater (5) is arranged for location above the turntable (4) and comprises at least one first heating element (6) and at least one second heating element (7). The at least one first heating element (6) overlies only a proportion of the total upper surface area of the turntable (4) such that, in operation, for each complete rotation of the turntable substantially all parts of the upper surface of the turntable are heated for substantially the same duration of time, the at least one first heating element (6) providing a first power density.

Abstract: Disclosed is a turntable drive mechanism in a cooking oven, comprising: a driver unit arranged outside a cooking chamber for rotationally driving a turntable; and a magnetic coupling arranged between a revolving shaft of the turntable and another revolving shaft of the driver unit; wherein said magnetic coupling is composed of: a first coupling member attached to the revolving shaft of the driver unit and having magnets arranged so as to provide a surrounding of said revolving shaft with magnetic poles of alternately different polarities; and a second coupling member attached to the revolving shaft of the turntable and having magnets arranged so as to provide a surrounding of the revolving shaft with magnetic poles of alternately different polarities, said first and said second coupling members facing each other with a non-magnetic wall portion defining said cooking chamber being sandwiched therebetween.

Abstract: Disclosed is a microwave oven having a tray which is arranged in a cooking chamber and on which a food to be cooked or a vessel having accommodated therein a food to be cooked is placed and a tray driving section which is disposed in a driving chamber for transferring rotating force to the tray. The microwave oven comprises tray supporting means for preventing the tray from being released from an original installation position. The tray supporting means includes a first coupling portion which is formed on a driving shaft of the tray driving section, a second coupling portion which is press-fitted around the first coupling portion, and supporting arm portions which extend from the second coupling portion in a radial direction so as to be respectively engaged with an edge of the tray.

Abstract: In a microwave oven, a turn table rotates once in a period TX. During one rotation of turn table, a control circuit usually detects six pulse signals. Control circuit detects a weight of food placed on turn table based on detected intervals TA, TB, and TC of pulse signals. Note that, if six pulse signals are not detected during one rotation of turn table, the control circuit retries detection of the pulse signals and detects the weight of food placed on turn table based on TA, TB, and TC for a subsequent rotation of turn table.

Abstract: A microwave oven to prevent a tray from deviation from its initial installed position due to vibration and/or shock, so that it can be conveniently used in a vehicle even when the vehicle is in motion. The microwave oven includes a cabinet having a cooking chamber and a driving chamber, high frequency generating section for generating high frequency waves and supplying the high frequency waves to the cooking chamber, a tray rotatably installed on the bottom of the cooking chamber, a food and/or a vessel containing food and being placed on a tray, a tray driving section provided in the driving chamber for rotatably driving the tray, and tray supporting section for rotatably supporting the tray and preventing the deviation of the tray from an initial installed position of the tray.

Abstract: An apparatus and method for heating a microwave oven using a deterministic chaotic signal. The microwave oven includes a heating compartment, a magnetron for generating microwaves, a waveguide for directing the microwaves into the heating compartment and a chaotic signal generator for driving the magnetron. The characteristics of the chaotic signal are adjusted to tend to vary the output energy of the magnetron and increase the uniformity of the microwaves in the heating compartment.

Abstract: A heating apparatus of the present invention relates to a high speed oven having a turntable mechanism for heating food products by utilizing a combination of jet impingement of heated air (a jet impingement) and microwaves or either of them, the apparatus comprising a safety device and an exhaust device.

Abstract: The present invention of a spinning tray for oven mainly includes a tray body for placing food. The tray body having a hole at its center for inserting a sensor rod. A spring is disposed underneath the sensor rod, a positioning frame is placed outside the spring and is fixed underneath on the tray body. A lower board of the positioning frame is provided for the spring to be compressed against. A L-shaped stopping bar is extended from the bottom of the sensor rod. A spinning mechanism includes a positioning board, few stand poles are disposed vertically underneath on the tray body for screwing to the positioning board by screws. A main axle goes through the positioning board. The main axle is wrapped around by a spring and is sleeved with a gearing. The main axle engages with the gearing by the elasticity provided by the spring. The gearing is engaged to few gear sets and a spinning blade is activated by a gear wheel. The whole spinning mechanism is covered by a cover and is fixed on the positioning board.

Abstract: A high frequency heating apparatus for heating an object to be heated is provided with an electromagnetic wave emission device for emitting electromagnetic waves, a local heating device capable of heating an optional portion of the object by the electromagnetic waves emitted from the emission device, and a control device for controlling the local heating device. The high frequency heating apparatus is further provided with a stage on which the object is placed, a protecting device for protecting the local heating device, a setting device and a detection device, so that the local heating device, the electromagnetic wave emission device or the stage is controlled in accordance with the setting device or the detection device.

Abstract: A microwave oven with halogen lamps is disclosed. In the microwave oven, two upper halogen lamps are installed on the top wall of a cavity of the microwave oven at a position corresponding to the central portion of a turntable. Two lower halogen lamps are installed on the bottom wall of the cavity so as to be diagonally opposite to the upper lamps and to not overlap with the upper lamps. Therefore, the light, emanating from the upper and lower lamps, is uniformly transmitted to the total area on the turntable. The upper lamps are positioned to overlap with the central portion of the turntable. The lower lamps individually have an output power of lower than that of each upper lamp. The lower lamps are positioned to be radially spaced apart from the central portion of the turntable. The microwave oven of this invention thus uniformly heats and cooks food laid on the turntable while effectively preventing thermal damage of a turntable motor due to heat of the lower lamps.

Abstract: A defrosting method for a microwave oven capable of variably adjusting a level of output power of a magnetron in accordance with data detected from a sensor, comprising the steps of (a) detecting a change degree of output data from a sensor for a predetermined time period; and (b) adjusting a level of output power of a magnetron in accordance with the change degree of the output data from the sensor.

Abstract: An automatic cooking control method for a microwave oven using data pattern of food, including the steps of: (a) collecting data outputted from a data detecting section for a predetermined time; (b) comparing the collected data with at least one prestored data pattern; and (c) selecting the data pattern among the prestored data pattern that is most similar with the collected data, and performing a cooking operation corresponding to the selected data pattern. When the data collected for the predetermined time corresponds to a no-load pattern, the microwave oven stops the cooking operation. Without separate external data input about weight or physical status of the food in the cooking chamber, the microwave oven automatically selects the most proper cooking process for the food in the cooking chamber by comparing the data about the food in the cooking chamber with the data patterns of the various foods prestored in the microwave oven.

Abstract: In a microwave oven, a driving motor is fitted inside a fitting member that is fixed to a cabinet. The upper part of the output spindle of the driving motor is disposed through the fitting member so as to protrude outward, and is fitted into the lower part of a linking member. The lower part of the rotary shaft of a turntable is fitted into the upper part of the linking member. The linking member is covered by a cover, and the lower part of the cover is fitted to the fitting member. On the upper part of and outside the cover, a coil spring for preventing leakage of radio waves is fitted so as to surround the rotary shaft. The coil spring is kept in close contact with the rim of a through hole formed in the bottom surface of a heating chamber. An overhang for drainage is formed in the linking member to prevent fluid from coming into contact with the output spindle.

Abstract: A microwave oven that automatically reads a barcode printed on a food item package, retrieves preprogrammed cooking instructions for that particular item corresponding to the barcode and then operates the microwave over, according to the manufactures specific instructions in order to achieve optimal food quality for the particular convenience food item.

Abstract: In a cooking appliance, the foodstuff is placed on a turntable in a heating chamber. Infrared radiation emitted from the foodstuff is sensed by an infrared sense unit. The cooking appliance obtains the number of extrema of the amount of infrared radiation sensed over the period of one cycle of the turntable. The number of foodstuffs is determined according to the number of maxima. A control unit drives a heat unit according to the determined number of foodstuffs.

Abstract: A tray driving apparatus for a microwave oven and a microwave oven having the same including a speed changing unit for enhancing the cooking quality by periodically changing the rotational speed of the tray to more evenly radiate a microwave to food. The speed changing means includes a driving gear unit having a plurality of driving gears and mounted to the driving shaft; and a driven gear unit having a plurality of driven gears corresponding to respective driving gears of the driving gear unit, and mounted to the driven shaft. The gears of any one of the driving gear unit and the driven gear unit are portion gears which are gears having gear teeth on respective portions of outer peripheries thereof, the gear teeth of the portion gears are alternately disposed to each other one on another.

Abstract: An oven with multiple pans is composed of a base, a base plate, rotating frames and roast pans, the base includes a motor which extends its spindle upwardly through the base plate linked with a transmission gear, the base plate having a plural recesses around the motor with a centrally formed shaft extending therefrom for accommodating a spindle of roast pans therein. The roast pans comprise gears at the edges to be meshed with the transmission gear and activated by the motor to rotate.

Abstract: An electric oven includes a microwave energy source (2), a waveguide (3) with an output section that terminates in a cooking enclosure defined by a base wall (4), a top wall (5), a sole wall (6) and two side walls (7, 8), and a rotary device (R) inside the cooking enclosure, for receiving food products to be cooked, and rotated by control elements (23) external to the cooking enclosure. The rotary device (R) has two or more rotary plates (9, 10), an upper (9) and a lower (10) plate, removably mounted in the cooking enclosure, one above the other and spaced from each other by a distance d, and the output section of the waveguide (3) is adapted to allow a suitable distribution of the waves on the two plates (9, 10).

Abstract: A control circuit and a method of control of a microwave oven is disclosed. The control circuit having a magnetron, a door to the microwave oven's cooking chamber, a turntable installed in the cooking chamber, and a turntable motor, includes a main relay that controls the power applied to each load, including the magnetron and the turntable motor; a power relay controlling an output of the magnetron; a turntable motor relay controlling the power applied to the turntable motor; a door switch sensing the opening and closing of the door; a first switch interlocked with the door switch and controlling the power applied to the turntable motor and the magnetron as the door is opened and closed; and a turntable motor solely driver driving the turntable motor independently of the magnetron when the door is opened.

Abstract: A high frequency heating apparatus for heating an object to be heated is provided with an electromagnetic wave emission means for emitting electromagnetic waves, a local heating means capable of heating an optional portion of the object by the electromagnetic waves emitted from the emission means, and a control means for controlling the local heating means. The high frequency heating apparatus is further provided with a stage on which the object is placed, a protecting means for protecting the local heating means, a setting means and a detection means, so that the local heating means, the electromagnetic wave emission means or the stage is controlled in accordance with the setting means or the detection means.

Abstract: A heating apparatus includes a central support axle positioned within a heating chamber of the heating apparatus. The heating apparatus provides both hot-air heating and micro-wave heating. A turntable has a central portion supported by the central support axle so that the turntable is rotated around the central support axle. A driving source is positioned at an upper side of the heating chamber for generating a rotating torque, and a connecting shaft for transmitting the rotating torque generated by the driving source to the turntable is provided in the heating chamber. The turntable has an entirely flat shaped section including a plane on which food products to be heated are mounted. A central portion of the flat shaped section is defined at a concave which is downwardly recessed into the plane and arranged to be fixed to and supported by the central support axis.

Abstract: The invention relates to an apparatus and method for operating a turntable motor in a microwave oven. The inventive system includes a transformation of a commercial power supply into a lower voltage power source for application to the turntable motor when the turntable motor is operated in response to a control signal.

Abstract: A metallic supplementary pot having superior heat conductivity is newly provided which is attached in the conventional nonmetallic specialized pot which is placed on a turn table mechanism of the microwave oven. When bread is made in the microwave oven, the supplementary pot containing material is attached in the specialized pot before cooking, and the specialized pot is attached to the drive shaft of the turn table mechanism in the oven cavity. Since the tip of the drive shaft is fit into the supplementary pot in this case, a vane member is attached to the drive shaft in the supplementary pot. When cooking is started, the vane member is turned with the rotation of the drive shaft and the material is kneaded into dough. Thereafter, the dough is heated uniformly and in a short time in the supplementary pot, and bread is completed.

Abstract: An insert for an oven, such as a microwave oven, includes an adapting mechanism compatible with a drive mechanism of the oven, a food treatment element, and at least one drive shaft coupled between the food treatment element and the adapting mechanism. The insert converts rotational forces conventionally used for driving a turntable into forces for driving a food treatment element, such as a rotisserie element.

Abstract: A microwave oven having an improved draining structure. The microwave oven has a turn table installed at an inner lower portion of a cooking chamber; a roller assembly disposed in a water collecting portion formed at the bottom plate of the cooking chamber so as to support the turn table against a bottom plate of the cooking chamber; a motor bracket attached at an underside of the bottom plate; a motor installed at an underside of the motor bracket; and a coupler for transmitting a driving force of the motor to the turn table. A water collecting groove having at least one first draining hole is formed at the water collecting portion of the bottom plate of the cooking chamber. A downwardly inclined portion for preventing a water dropped from the first draining hole from flowing into the motor is provided at the motor bracket below the first draining hole. At least one second draining hole is formed at an end of the downwardly inclined portion of the motor bracket.

Abstract: A microwave oven equipped with a microwave stirrer. The oven has a magnetron for generating a microwave, a tray for rotating a foodstuff, a stirrer for uniformly dispersing the microwave into a chamber, and a driving device for simultaneously driving the tray and the stirrer. As a driving device, a motor and a gear section are provided so that the driving device drives both the tray having rollers and stirring plates for stirring the microwave. The oven stirs the microwave so that the microwave is uniformly dispersed in a chamber, thereby uniformly heating the foodstuff.

Abstract: A microwave applicator (10) including a tunable cavity (12) having by an elongated casing formed from a transition section (14) axially secured between upstream and downstream end sections (16) and by first and second end assemblies (28) each axially movable in the elongated casing. A tube assembly (72) passes through and is rotatably supported within tubes (36) of the end assemblies (28) and passes through the elongated casing. Material in the tube assembly (72) in the elongated casing and between the end assemblies (28) are subjected to microwave power introduced into the transition section (14) by a waveguide (110) via an opening 20. The axis of the tube assembly (72) is adjustably offset from that of the elongated casing and the transition section (14) is adjustably fixed at various circumferential positions to superimpose the material bed in the tube assembly (72) with the area of highest field strength.

Abstract: A microwave oven includes a cooking chamber in which a turn table is disposed for rotation about a vertical axis, and vertical up/down movement along the axis. The turn table has an axle extending downwardly therefrom along the axis. The lower end of the axle rests on a cam surface of a rotary cam member whereby the cam surface causes the axle (and thus the turn table) to alternately move up and down when the rotary cam member is rotated by a first motor. A second motor is connected to the axle to simultaneously rotate the axle and turn table. A traction member is fixed to the rotary cam and overlies a portion of the axle. The traction member extends along a portion of the cam surface which causes the axle to move downwardly, whereby the traction member can pull the axle downwardly if the axle does not properly gravitate downwardly.