Abstract: An electric hotplate has a hot plate body and plugging pieces for connection to connecting members of supply lines. A stacking aid is provided for receiving a plurality of hotplates in a multilayer stack, the stacking aid having pallet plates providing receptacles for receiving the plugging pieces of each single hotplate laterally outside of each single hotplate.

Abstract: In the case of a heating device (1a) particularly suitable as a continuous flow heater, on an outer surface (4a) of a wall (3a), a tubular heater (6a) and a heat conducting element (10a) are so closely arranged in juxtaposed portions (14a) that the heat conducting element (10a) with a flat side (12a) and the heating element (6a) with a contact surface (16a) are uninterruptedly connected to said surface (4a) by means of very thin layers of a solder-like fixing material (11a). The longitudinal edge faces (21) of the strip-like heat conducting element (10a) are substantially connected to adjacent portions (14a) of the heating element (6a) and by means of solder-like fixing material are connected uninterruptedly to said heating element (6a).

Abstract: An electric cooking appliance has a sheet steel, glass, ceramic or glass ceramic carrier plate (15), to whose underside are applied for electrical heating purposes thick film resistors (16). It can be constructed as a large-area plate with several cooking points, or as an individual hotplate, which is received in a mounting rim (26). Temperature limitation and regulation sensors (22) are applied in the form of film resistance sensors to the underside of the carrier plate.

Abstract: A cleaning machine, such as a washing machine, is provided in the bottom region of its wet chamber with an outlet and an intake connected thereto immediately above a feed pump, adjacent to which a heating section with an electric heating element located outside the wet region is provided, in such a way that a circulating duct is formed which leads through the wet chamber, the outlet and back to the inlet to the inlet side of the feed pump, in which the washing solution is carried in circuit form under thermosiphonic effect, so that the washing solution is heated and portions of the cleaning agent added to the washing solution and which tend to sink are dissolved.

Abstract: In an electric hotplate (1) a hotplate body (2) is constructed in such a way that a holding element (25) provided to fix the hotplate in a hob and arranged below the hotplate can be located in a relatively small distance from the top-side respective the cooking surface (3) of the hotplate body (2). Thereby a very flat mounting arrangement is possible. For example an outer flange rim (6) of the hotplate body (2) can have a groove-like reception depression (30) for an engagement of the holding element (25), this engagement also serving a rotation prevention. It is also possible to construct the outer flange rim extremely low, e.g. in such a way that its lower edge face is located higher than the lower edge face of a central stud of the hotplate body.

Abstract: For the transportation-storage and assembly stacking of electric hotplates (2), a stacking air has pallet plates (10) to be arranged in superimposed manner in stacking layers and which can be directly stacked in one another for storage and which are in the form of deep drawn plastic plate parts with grid-distributed flat shells (19), which in each case projecting beyond the open side with the cooking surface (4) receive in centering manner the lower part of an electric hotplate (2) and are supported with respect to the cooking surfaces of the adjacent stacking layer by means of a slide preventing means (31), but are otherwise contact-free. Thus, on a support pallet and protected by a packing sleeve it is possible to stack a very large number of hotplates (2) in a stable manner, with the same orientation and therefore having good assembly access.

Abstract: In the case of an electric heater, particularly a radiant heater for glass ceramic hotplates, there are several spirally nested heating resistors, whereof one heating resistor continuously passes through in the central field in such a way that it forms two nested spirals (10, 17) distributed approximately uniformly over the entire heating field, but which are not directly adjacent to one another and instead between their spiral turns (20, 21) is provided at least one spiral turn of a further, spirally wired heating resistor. This makes it possible in simple manner to make the length of said first-mentioned heating resistor much larger, so that it has a very high rated power, but can still be safely laid or wired in the heating field without any risk of local overheating.

Abstract: In an electric hotplate (1), the hotplate body (4) has a throughbore (28) located in its central axis (10) and traversing a central stud (7) and the top surface and in which can be arranged in countersunk manner the head (26) of a fastening bolt (25) projecting over the underside of central stud (7). On the underside of the hotplate (1) is provided for the electrical connection thereof a connecting piece (16) of an electrical snap closure coupling (20), so that hotplate (1) in simple manner and with limited tool expenditure permits a rapid assembly from the top of a mounting plate (2) and, if necessary, can also be rapidly replaced.

Abstract: An end piece (1) for a tubular heater (2) has an insulator (10) traversed from the end portion (8) by its connecting member (6) in a passage (16) and substantially completely closing the associated end portion (7) of tube casing (3) and on whose end face (19) remote from the tubular heater (2) is provided a separate metal connecting piece (20) welded to the associated end face of connecting member (6) by a welding head (33). Connecting piece (20) forms one or more freely projecting elements (25) for direct connection to electrical leads. Thus, end piece (1) is positively secured with respect to the tubular heater (2) and is suitable for an easy electrical connection, which can be released at any time.

Abstract: In a cooker plate (1) connection of the particular electric hotplate (3) a window opening (19) is provided as an assembly opening in a holding part (5) substantially completely covering the same on the underside, through which can be passed a connecting piece (21) for the electrically conducting connection to the connecting members (15) of hotplate (3). This window opening (19) can be substantially completely closed with a closure (20), the latter being constructed in one piece with a ceramic insulator (22) of connecting piece (21) or can be formed by a separate component made from sheet metal or the like. This leads to a very reliable and effective closure of the cooker plate (1), also on the underside thereof.

Abstract: In an electric heating unit (1), at least one heating circuit of a heating resistor (2) is arranged as a coated or printed conductor track and is consequently arranged by means of an adhesive joint (16) on a support (3) made from a high temperature-resistant synthetic paper. The unit is fixed, on its bare side remote from the heating resistor and by means of a whole-surface adhesive joint (13), directly to the associated reception side (11) of the body (10) to be heated. The adhesive joint (13) is appropriately formed by an adhesive layer (14) of silicone resin adhesive or the like, or a self-adhesive layer with a thickness of a few tenths of a millimeter and which permanently in stress-compensating manner has roughly the same thermal stability as the support (3). At least one heating circuit can be switched by means of a mechanical temperature switch with high switching hysteresis.

Abstract: In a cooking unit (1) in the marginal region of the underside of hotplate (3) a tensile stressed support (4) is fixed immediately adjacent to the outer circumference (8) of a radiant heater (2). Support (4) engages below a cover (13) of the insulation of radiant heater (2) serving as a base plate and at least one spring (22) is arranged between a marginal strip (16) and the underengaging leg (19), so that a prestressed, closed assembly for fitting in a hob or the like is formed. Appropriately there are several closely juxtaposed, rectangular radiant heaters (4) with in each case separately switchable or regulatable heating circuits, so that at least approximately 85% of the total surface of the cooking field can be directly heated.

Abstract: In a temperature limiter (1) with a rod-like temperature sensor (6), the outer tube is formed by a continuously tensile-stressed insulating tube (7) extending into a base (2). An inner rod (8), optionally articulated two or more times in the longitudinal direction, is constructed as a continuously pressure-loaded rod, characterized by temperature-dependent length expansion. The temperature limiter (1), e.g., for a glass ceramic unit, may have a circuit breaker (5) closer to the temperature sensor, and a more-remote signal switch (4). In that case, for operating the remote signal switch, a flat bar-like transfer member (9) traverses both switches through openings (54). The transfer member is coupled at the associated end and in adjustable manner with an operating member (30) for the signal switch (4), receiving the adjustment member (34). The parts are constantly held together in clearance-free manner by the tension of a restoring spring (40).

Abstract: For the in particular fully automated electrical connection of electric hotplates (2) to connecting lines (15) a connecting piece with an insulator (18) is provided, which is provided outside two remote end faces (25, 26) with pin-like connecting parts (20, 21) at right angles to its main longitudinal direction, in such a way that they are located in crossing manner to the incoming connecting parts (16, 17) to be connected thereto and are reliably connected thereto at the junctions (22, 23) by spot welding. On the end faces (25, 26) are also provided centering recesses (32) or guiding and orienting faces (35, 36) for the incoming connecting parts (16, 17), so that a self-orienting effect is obtained on assembly.

Abstract: A sealed electric hotplate can be simply fitted by lateral insertion into a hob. For this purpose a hotplate with a cast metal body is surrounded by a very wide trim ring, which is provided with centering projections. The wide ring is separately grounded, in that a grounding line is provided between the trim ring or the hotplate body or the plug-in connection. Electrical connections are made through a two part insulating hosing received in a bottom cover plate which fixes the housing parts together and allows uninsulated leads to the heating resistors.

Abstract: In an electric hotplate (1b), the connecting portions (19b) for the connection of appliance lines (34) provided on the underside thereof can be transferred about articulations, namely bendable or pivotable joints or hinges, e.g. in the form of springs (71) into a transportation and fitting position, in which they are completely countersunk in the underside of the hotplate and also do not project over the outer circumference thereof. The connecting portions (19b) can be transferred from this transportation and fitting position into a connecting position projecting both above the outer circumference and above the underside of hotplate (1b), in which they can be connected in a simple manner with a connecting piece (31) of the appliance lines (34). This ensures both an equiaxial automated stacking of the hotplates and an automated fitting of the hotplate in a hob or the like in simple manner.

Abstract: An electrical component (11) comprises a support (12) largely made from unalloyed steel sheet (13) with an aluminum coating (14). This serves as the anchoring coating for a glass, fused or fired insulating layer (15) applied to the conductor (16). The component is suitable as a self-supporting, heat-emitting room heating resistance element, as well as an electronic support and slide-in element.

Abstract: The lower cover plate of an electric hotplate is fixed to the hotplate body by a resilient fixing structure provided on the cover plate, engaging with gripping edges on the outer face of a downwardly directed, central cast pin. The fixing structure can be defined by radial or flap-like, inwardly-directed portions of the cover plate and additionally can have portions engaging on the lower face of the pin and which are firmly held by the final screwing down of the electric hotplate.

Abstract: In the case of an electric radiant heating element (11) positioned below a glass ceramic plate (12), a rod-like temperature sensor (23) of a thermostat (24) projects over and beyond the heating zone. There are spacers (35) for maintaining a minimum spacing between the insulator (15), which carries the heating resistors (20), and the glass ceramic plate (12).

Abstract: A cooking unit has electric hotplates (115) fitted in openings (113) of a mounting plate (112) and each electric hotplate is fixed against rotation. The associated rotation prevention member (14) can e.g. be an elastically movable tongue, which cooperates with a depression (132) in the vicinity of the outer, lower marginal edge (128) of the electric hotplate (115) and slopes upwards from the center in a substantially linear manner. However, even without any directly acting connection to the mounting plate, the rotation prevention member can prevent the rotation of at least two hotplates with respect to one another and combine the same to a rotation preventing compound unit. This leads to a constructionally very simple, easily assemblable and reliable fixing of the electric hotplates.