Abstract: A tubular electric resistance heater includes a tubular sheath enclosing an electric heater coil. As protective overheat safety device is provided at an end of the sheath and includes an electrically conductive tube disposed in a cavity in the end of the sheath and having a closed end electrically connected to the heater coil. A rod-shaped member made of a thermally deformable material extends through the tube from the closed and projects out of the other end of the tube into activating engagement with a normally closed switch located externally of the tubular sheath and electrically connected in series with the tube and thereby the heater coil. Excessive heater coil temperatures cause the rod-shaped member to deform and actuate the switch to its open position to deenergize the heater coil. The rod-shaped member may be made to a memory-alloy or a plastic which changes its structure, e.g., shrinks, or melts at a certain temperature.

Abstract: A tubular heater in which a safety fuse or a PTC-element, a sensor for an electronic circuit or a thermostat is disposed as an overload safety means in the non-heated end region of the tubular heater.

Abstract: A continuous flow heater assembly for an electrically heated apparatus for producing an infusion beverage comprises a generally dish-like mounting plate carrying a tubular heater of generally annular configuration and, inside that annular configuration, a water pipe which is also of a generally annular configuration. The underside of the tubular heater and the water pipe are in heat-conducting contact with the mounting plate while the underside of a support plate for supporting a container containing a beverage bears against the tubular heater but not against the water pipe. A raised edge portion of the dish shape of the mounting plate extends at a small spacing from the adjacent side wall of the tubular heater, to a position close to the underside of the support plate. Alternatively, a guard ring may be fitted onto the space between the mounting plate and the support plate outwardly of the tubular heater to partially close the space between the plates.

Abstract: An electric continuous flow water heater for domestic appliances, such as coffeemaking machines, has a water heating assembly comprising a tubular electric resistance heating element disposed in side-by-side heat exchange relation with a water flow pipe. The assembly is bent into a generally horseshoe-shaped configuration and a heat conductive bridge member extends across the heating element and water pipe substantially centrally of the length thereof and is in contact therewith. A temperature dependent switching means, such as a thermostat or a PTC element, and a thermal safety fuse are electrically connected in series with each other and the heating element are carried on the bridge member with the switching element secured on one side of the heating element-water pipe assembly and the safety fuse secured on the other side of the assembly.

Abstract: A heat exchange assembly such as for a solar roof comprises a pipe carried by a carrier plate and held thereto by suitable holding means. The carrier plate and/or the holding means have openings, each opening having a jagged edge portion projecting perpendicularly to the surface of the component in which it is formed. The jagged edge of each opening is partially embedded into the other component and material from that other component is engaged into the opening to form a rivet head-like configuration thereby to anchor the two components securely together.

Abstract: An electrical heating device for cookers and hot plates is disclosed, having a heat-resistant support member disposed below a heat-radiation transmitting plate, in particular, a glass-ceramic plate. The support member is adapted to receive at least one electric heater filament, wherein the support member is disposed within a hollow space between the heat-radiation transmitting plate and a heat-insulating layer or body. The support member is provided with holes or cut-out portions enforcing convection of the air enclosed within the hollow space, and furthermore, the heat-insulating layer being covered by a reflecting sheet or foil, so that a substantial portion of the heat radiated downwards by the heater filament is directed partially by reflection at the sheet or foil and partially by the air current passing over the sheet or foil onto the heat-radiation transmitting plate and onto a cooking or frying vessel standing thereupon.

Abstract: To produce a heater or heat exchange element, a wire coil is wound around a pipe, in a stressed condition. When the pipe is pressed on to a heat-transfer and support element, the projections formed by the wire coil penetrate into the support element and are anchored therein. Suitable selection in respect of the hardness of the materials used makes it possible for the portions of the wire coil which are remote from the support element to be pressed flat until they come into at least approximately contact with each other, producing a form of protective shell which also improves heat transfer between the pipe and the support element.

Abstract: A heater for heating at least two separate fluid flows comprises a heater arrangement mounted on an inner pipe through which one of the fluids flows and which is surrounded by an outer pipe through which the other fluid flows over the heater arrangement. The fluid flowing through the inner pipe may be dish-washing liquid for a dishwashing machine, while the fluid flowing through the outer pipe and over the heater may be dish-drying air.

Abstract: Apparatus for making an infusion drink, comprises a water supply container and an electrically heated water through-flow conduit, and, therebetween, a regulator for regulating the through-flow of water, in the form of a choke or flow restrictor which acts to reduce the cross-section of the flow of water and to increase the flow speed, so as to provide for a through-flow rate, in each unit of time, which is substantially continuous over the entire period for which water is flowing through the apparatus, with the flow pressure in the choke or restrictor being higher than the steam pressure required for driving the water out of a riser pipe and into a beverage container.

Abstract: A heater assembly for a container such as a cooking vessel includes a heating coil in a tubular heater casing, with a connecting pin member connected to the heating coil and projecting through an insulating sleeve mounted to the end of the casing. A plug connecting pin is mounted to the part of the pin member projecting from the insulating sleeve. The end of the casing is butted directly against the insulating sleeve, and a casting material is cast around parts of the plug pin, the casing and the insulating sleeve to form an assembly thereof.