Abstract: Dental parts which are permanently installed in the mouth such as acrylic teeth or jackets, bridges, crown veneers, acrylic crowns, crowns with an acrylic face or coating, and other permanent dental restorations containing acrylic are produced quickly and without substantial distortion or breakage without the use of a dental flask. Rock plaster is formed into a nest-shaped piece. The nest may be a vertical nest or horizontal nest which has a generally centrally located hollow portion or cavity having an open top. A dental part, made of wax, may then be inserted into the cavity and pressed by hand into the surface of the rock plaster to make or form an impression of the wax part within the inside surface of the nest. After the rock plaster dries or cures, the wax may be melted and removed from the nest. Heat-curable acrylic may then be dripped or poured into the hollow portion of the nest where it covers and fills the impression left by the wax dental part.

Abstract: A method of preparing a food product is disclosed and includes the steps of placing the food product within a cooking cavity, reducing the pressure within the cooking cavity thereby creating a vacuum within the cooking cavity, heating the food product within the cooking cavity and returning the cooking cavity to atmospheric pressure. In doing so, a temperature necessary to cook the food product in the vacuum is less than that temperature necessary to cook the food product at atmospheric pressure. Consequently, the food product may be fully cooked at a temperature which does not cause the food product to dry-out or become tough.

Abstract: In the present invention dental prostheses are cured without the use of dental flasks using an electrically heated pressure vessel. The dental prosthesis is cured while in a plaster chamber which is placed in a curing container with ambient water. The apparatus includes a perforated table for supporting the curing container during heat curing. The vessel has a lid for sealing the top, an inlet for injection of compressed air, an outlet for exhausting of compressed air, and an electrical resistance heating means for heating water held in the vessel. The curing container holds ambient temperature water at a level which covers the plaster chamber prior to submerging the curing container in the vessel containing water at a temperature of 90.degree. C. to 100.degree. C. The table supports the curing container in the vessel so that the top edge of the curing container is above the level of water held by the vessel.

Abstract: In the present invention dental prostheses are cured without the use of dental flasks using an electrically heated pressure vessel. The dental prosthesis is cured while in a plaster chamber which is placed in a curing container with ambient water. The apparatus includes a perforated table for supporting the curing container during heat curing. The vessel has a lid for sealing the top, an inlet for injection of compressed air, an outlet for exhausting of compressed air, and an electrical resistance heating means for heating water held in the vessel. The curing container holds ambient temperature water at a level which covers the plaster chamber prior to submerging the curing container in the vessel containing water at a temperature of 90.degree. C. to 100.degree. C. The table supports the outing container in the vessel so that the top edge of the curing container is above the level of water held by the vessel.

Abstract: A portable electric wallpaper steamer has a generator (G) including a base (1) and lid (2), both injection molded of plastic material. An elastomeric sealing ring (29) is seated in a recess in a circumferential interengagement zone between the lid and base and is held compressed by the interengagement of engagement members (24) on the lid with cooperating engagement members (39) on the base. The lid-engagement members (24) and base-engagement members (39) comprise integrally molded parts of the lid and base and one or both are resiliently deformable so that they can be brought into snap-fit engagement with each other by downward movement of the lid relative to the base to form a steam pressure tight seal. An electric heating element (6) is mounted in the base for heating water therein to generate steam. The lid includes a handle (9), filling port (10), safety valve (13) and a steam outlet port (21) connected to a wall paper steaming plate (W) by a pipe.

Abstract: An entirely uniformly heated responsive cooker comprising an inner pot and an outer pot, wherein the inner pot neither directly touches the heating source nor the wall portion of the outer pot by means of exhalation valve means capable of adjusting proper pressure and thermal energy existing in the outer pot according to the cooking requirements of different foods, resulting in the food in the inner pot being entirely and evenly heated by thermal energy so that the cooking time is reduced, safety is ensured, and the original flavor of food is preserved to effectively achieve the object of energy-saving and economy.

Abstract: A cast cup provided with a heating element is secured to the bottom plate of a reservoir for a percolator. The cup is inserted into an opening in the bottom plate of the reservoir and has an upper flange and a lower flange. The upper flange is secured to the top surface of the bottom plate by means of swaging. The seal is water-tight. The lower flange has a sealing compound applied to it and is sealed against the underside of the bottom plate when the upper flange is swaged to the top surface of the reservoir's bottom plate.

Abstract: A safe, portable apparatus for sterilization of saline or other liquids is provided. There is provided a device for sterilizing and storing liquids comprising a housing, a hollow cyliner formed in the housing having an open first end and a closed second end, a piston sealingly mounted for sliding within the cylinder, the piston and the cylinder thereby forming a closed chamber for receiving the liquid, the chamber provided with a sealable opening for introducing the liquid to the chamber, means for biassing the piston into the cylinder thereby applying pressure to the liquid, means within the housing for heating the liquid, and fluid discharge means for discharging the liquid when sterilized.

Abstract: A device for heating food with steam includes a relatively small water container heated by an electric heating source so that steam is generated very shortly after switching on the heating source. The evaporated water is at least partly steadily resupplied preferably from the condensate of the steam precipitating at the inside of the lid of the device, or via a separate water reservoir which is defined by the bottom space of the base of the device.

Abstract: A method and apparatus for forming and bonding metal assemblies using an internally heated chamber. The parts can be both superplastic formed and diffusion bonded to other parts. A closable chamber contains a heating element near the chamber center. A ceramic die at least partially surrounding the heating element has a forming surface toward the heating element. The inner wall of the chamber is lined with a pressure bladder. A granular material, conical ceramic support, or extensible bladder fills the space between ceramic die and chamber inner wall. With the chamber closed, the heater is activated while an inert gas under pressure is introduced between heater and die and the bladder if used is pressurized. The bladder or packed granules support the outer die surface while the gas pressure presses metal parts on the die forming surface against the die. The metal parts are formed and bonded together by the substantially isostatic forces thereon.

Abstract: A pressurized batch cooking pot has an encircling radiant heater which has a high temperature insulation shell with end abutting the pot and a center portion spaced from the pot. A spiral coil is firmly embedded within the inner wall of the insulation shell with the outer surface of the coil turns opposed to the pot exposed and flattened. The oil level in the pot is somewhat above the uppermost end of the heating coil. The air gap between the coil and the pot is selected for efficient energy transfer. The spiral coil is formed in vertically spaced rows circum-ferentially distributed about the pot. Integral end connections are formed substantially rectangular with a plurality of coil turns integrally joined to the turns of the parallel rows by a similar integral U-shaped wire. The pot is a relatively elongated unit having a length to diameter ratio of at least 1.6 to 1. The outside of the sidewall of the pot has a black body coating. The cooking oil is operated with a cooking temperature of approximately 300.

Abstract: A device for treating plastic parts for use in dental and orthodontic applications includes a pressure receptacle which has walls which define a hollow interior with an opening which is closable by a cover or lid. A support for material to be treated is placed within the hollow interior at a spaced location in the interior walls and adjacent a heating device which is advantageously an electric heating element. The device includes a rotatable fan which is advantageously mounted on the vessel as a shaft which extends through the vessel interior and carries a rotatable fan which is rotated so as to direct a gas such as air past objects held on a support and past the heater which maintains the circulating gases at a temperature which permits polymerization of the parts. The heating air is continuously circulated and it is heated by the heater sufficiently to maintain a selected polymerization temperature.

Abstract: An electrical cooking apparatus for cooking natural substances such as rice, herbs, soups, and the like, the cooking device being divided into a lower cooking chamber and an upper cooling chamber, which includes a cooking container disposed within the lower cooking chamber, a valve member providing communication between the upper cooling chamber and the lower cooking container whereby the cooking steam rising from the cooking container and introduced through the valve member into the cooling chamber is condensed and returned as a liquid to the cooking container, a downwardly inclined baffle member disposed beneath the valve member for interrupting the flow of condensed liquid through the valve member and directing it to the side walls of the cooking chamber, and a heating member for the cooking apparatus.

Abstract: A pressure interlock means to prevent release and opening of the cover under a potentially dangerous condition. The cooking apparatus is formed including a suitable open-top pot having a top cover unit secured to open and close the pot. Cooking oil is contained within the pot to a suitable depth or level spaced from the pressure cover unit. A pressurized deep oil cooker has a cover unit and includes a clamp bar pivotally connected to one side of a cooking pot. A mechanical hook unit couples a hook member on the free end of the bar to a pin. A plate cover has a D-shaped seal in a dovetail groove and abutts the upper edge of the pot. The cover is secured to the cam by a slotted connection permitting limited movement of the cover relative to the bar. A cam unit is coupled to the bar and has a rotating cam having a release position in which limited movement of the cover is permitted and a locking position which spreads the clamp bar relative to said cover to seal the cover and set the latch.

Abstract: A rice cooker has a body provided with an upper opening. A lid for opening and closing the upper opening is swingably supported on the body by a hinge mechanism. The lid has a grip portion extending, like a bridge, along the upper surface of the lid from that portion thereof which is adjacent to the hinge mechanism to that portion thereof which is opposite to the hinge mechanism. The lid is locked at a closed position by a lock mechanism. A tension coil spring is arranged along the grip portion to urge the lid in the direction of opening the lid. Thus, when the lock mechanism is released, the lid is automatically opened by the urging force of the tension coil spring.

Abstract: The invention relates to a cooking vessel comprising a cooking pan and cover, especially a steam pressure cooker, to which a temperature-dependent resistor is attached as a temperature sensor with an attached computing device for the determination of the temperature inside the cooking pot, and for the transmission of electrical signals corresponding to the temperature detected.In order for the cooking vessel to be equipped for an exact measurement of temperature without greatly increasing costs, a measuring point covered by the handle is provided, to which a temperature sensor is attached. One of the handles of the cooking pot or cover carries a plug accommodation with connection contacts, which mechanically accommodates a computing device formed as a plug unit, and connects electrically with the temperature sensor.

Abstract: The invention relates to a cooking vessel comprising a cooking pan and cover, especially a steam pressure cooker, to which a temperature-dependent resistor is attached as a temperature sensor with an attached computing device for the determination of the temperature inside the cooking pot, and for the transmission of electrical signals corresponding to the temperature detected.In order for the cooking vessel to be equipped for an exact measurement of temperature without greatly increasing costs, a measuring point covered by the handle is provided, to which a temperature sensor is attached. One of the handles of the cooking pot or cover carries a plug accommodation with connection contacts, which mechanically accommodates a computing device formed as a plug unit, and connects electrically with the temperature sensor.

Abstract: A pressure compensating container having a cavity and including an open end. A closure lid is provided for sealing the open end of the container. A pressure regulating device is operatively connected to the container for regulating the pressure within the cavity. The base portion and the lid portion are constructed of a microwave permeable material. A safety pressure relief valve is provided having a manually operated pressure relief button for relieving the pressure within said cavity of said pressure compensating container.

Abstract: A self-standing cooking apparatus is disclosed which consists of a pressurizable vessel having a door which can be latched and sealed, an integral steam-pressure source and integral upper and lower heating rod elements which serve as broil elements and bake elements, respectively, and a water-filled tray which can be disposed above the upper heating rod. An electrical control circuit enables selective energization of the bake and broil heat elements by continuous or controlled duration pulses of current which control the proportion of infrared energy that will be produced by the heating rods. The oven can be operated under pressure with the heating rods applying infrared radiation to the foodstuff being cooked in order to obtain browning or crisping of the foodstuff which is cooked at elevated pressure. The oven can also be operated in a conventional bake mode, a conventional broil mode, a steam cooking mode, a sealed cooking and warming mode and a toasting mode.

Abstract: An assembly for preparing and bottling liquid infant's formula, which assembly includes a steam basin having a water reservoir, and a heating element in the reservoir for boiling the water to yield steam, a graduated measuring pitcher invertible over and adapted for support upon the steam basin; and sterilization racks removably supported on the steam basin and dimensioned for containment within the measuring pitcher.

Abstract: A pressure fryer having a vessel adapted to cook a food product within a bath of cooking oil. A cover seals the vessel in a pressure-tight condition and, as pressure builds up in the vessel, the cover automatically locks an opening-closing actuator to prevent the cover from being opened. When the pressure is relieved, the cover unlocks the actuator to permit opening of the cover.

Abstract: A food product is cooked under pressure and within a bath of hot cooking oil in a vessel when the vessel is sealed closed by a cover. The pressure in the vessel is controlled by an exhaust valve which must be located in an open position before the cover may be closed and sealed. As long as the exhaust valve is closed, it is not possible to open a drain valve and drain the oil from the vessel.

Abstract: A pressure fryer having a vessel adapted to cook a food product within a bath of cooking oil. Means are provided for detecting the presence of water in the vessel and the bath and for automatically disabling the heater of the fryer if water is present in such quantity as to create a potentially unsafe condition.

Abstract: A pressure cooker particularly adapted for use as a pressure fryer. The cooker's tank is electrically heated by a novel electrical resistance heater and heat reflector structure. The cooker also includes a novel cover and cover hold-down mechanism.

Abstract: A two-staged pressure cooker comprises an air-tight vessel having an upper-stage chamber for containing foods to be pressure-cooked and a lower-stage chamber for containing water. The two chambers are separated from each other, each having a pressure-actuated regulating valve which allows the chamber to be maintained under an appropriate pressure for cooking. Foods can be placed in both chambers for pressure cooking.