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: An electric switching device (1) in the form of a timed power control device with an appliance switch (6) operated by a heated thermobimetal (15) and in the form of a snap switch has an adjusting device (39) for modifying the distance between the opposite contact (36) and the counter-stop (37) for the movable switching contact (34), operated simultaneously with the setting of the different setting ranges of the switching device in such a way that in the low setting ranges the switching hysteresis of the appliance switch (6) is made smaller and in the higher setting ranges larger. Thus, in particular the smaller values of the relative switch on duration of the appliance switch (6) can be set much more accurately, so that there is a very precise power control in the low setting ranges.

Abstract: The present invention relates to an apparatus for connecting appliance lines to cooking plates, hobs or hotplates. Our of the bottom of the electric hotplate, connecting pins (19b) extend for connection to connecting members (33) of a connecting piece (31) that is part of the appliance line. From a passage through an insulating member (20b) in the bottom of the hotplate, the connecting pins (19b) project outwards towards the circumference of the hotplate body (2b). In a transportation mode the pins can be resiliently and completely countersunk in the underside of the hotplate. In the vicinity of the front end of the connecting members (33) of the appliance plug, the connecting piece (31) of the plug has a threading and guidance apparatus for the connecting pins (19b) that does not project beyond the outer circumference of hotplate body (2b), thereby ensuring an automatic, positonally correct connection between the connecting piece (31) and connecting pins (19b).

Abstract: In an electric hotplate (1), the casing (15) of a thermal cutout (14) integrated with a projecting expansion rod temperature sensor (16) is open or unclosed on the top side, so that its reception depth for receiving the associated limiter switch is open upwards towards the underside of the hotplate body (2). On either side of the opening of casing (15) located in said top side (17), the casing is provided with spacers (18, 19) in one piece therewith and projecting upwards to different heights for engaging on the associated sloping surface (13) of the underside of hotplate body (2). Thus, in the case of simple manufacture, a good ventilation of casing (15) is obtained.

Abstract: A fastening mechanism for mounting operating equipment or the like, particularly on electric household equipment has bayonet catch-like tension members for engaging in a panel. Each tension member can have in a slightly resiliently movable region on one side, a shoulder surface for the inclined supporting on the outside of the panel and on the other side can have a wedge surface for the self-cutting engagement in a boundary edge of a passage opening of the panel. Accompanied by self-compensating position adaptation, the tension member is not only braced with the shoulder surface under pretension against the outside of the panel, but is also wedged at right angles thereto in the passage opening.

Abstract: In a radiant heating unit, an insulating support for carrying a radiant heating resistor is molded or pressed using a granulation of expanded clay materials, particularly expanded mica or vermiculite. The granulation is compressed and bound in a blank by a mineral binder, particularly water glass, and the heating resistor is positively secured in the moulded granulation by embedding parts of the resistance wire forming the resistor, in such a way that the resistor is in part free of the insulating support on the front. The heating resistor can be embedded during production of the insulating support or can subsequently be pressed into the support. The insulating support of the heating unit is low in weight and easy to manufacture, has optimum electrical and thermal insulating properties and has very good strength, whereby the heating unit has a long service life.

Abstract: A stacker has support units with in each case a plurality of support members for in each case two superimposed hotplates distributed over the hotplate circumference and connected by connecting elements so as to be slightly elastically movable relative to one another. The hotplates engage in centered manner in the support units, in such a way that the central axes of the two hotplates engaging in a support unit are mutually displaced at least by the diameter of the fixing bolts projecting over the undersides of the hotplates. For the arrangement under in each case one double layer of hotplates spaced by support units, intermediate layers are provided having on their upper surfaces centering cavities for the engagement of the hotplates and on their bottom surfaces having protective layers for the careful placing on the in each case underlying hotplates.

Abstract: An electric hotplate (2) with a cast iron hotplate body (1) has in its unheated central area (14) a thermostat (19) which, by projections (51) on a cover plate (17), is forced into clearly defined contact with the lower surface (50) of the hotplate body (1) in the vicinity of the unheated central area (14). Casing (23) of thermostat (19) has three projections (8), which are supported on surface (50). The unheated central area (14) does not have to be covered by any cover separate from cover plate (17a). Casing (23) has a recess open on one side and which is not closed by a cover.

Abstract: A hotplate is provided on the bottom of its body with a cover plate, through which a lead is passed through an insulator. The stub-like ends of the leads are connected to the outer terminal portions of the multicore cable ends projecting from a positioning part and are squeezed at this point. The multicore cable ends are longer than conventional multicore cable ends.

Abstract: A hotplate has on the bottom of its hotplate body (11) a cover plate (15), through which is passed an electric conductor (18) mounted in an insulating bushing (19) and which only slightly projects over the end of the insulating bushing (19). For automatically placing the hotplate in a stove unit, electrical connecting lines (21) are guided by a positioning member (20) which can be fixed to the rim (14) of the hotplate body (11). On the inside, the connecting lines project far enough to be brought into contact with the electrical conductor (18) passing through the cover plate.

Abstract: A thermostat for an electric hotplate has a casing formed in one piece from an insulating material with a bottom and four side walls defining one open-sided recess therebetween, a snap-action switch, a support, and a bimetallic strip mounted on the support and acting on the switch, the casing having slots formed therein for fixing the switch, support, and strip in the recess. the recess remains open at the one side when the casing is mounted on the hotplate. Interfitting locking structure on the support and formed interiorly on at least one of the side walls can be brought into mutual engagement by movement of the support substantially parallel to the bottom of the casing, whereby the bimetallic strip is safely and securely held in the recess notwithstanding the absence of a cover for the recess.

Abstract: An electric hotplate has a hotplate body in the form of a thin ceramic substrate, to whose bottom surface is applied, e.g. by printing, a thin resistive material film. This resistive material film is covered by a protective coating, which prevents damage. Between the protective coating and the bottom tray of the hotplate is provided a thermal insulating layer. The hotplate has an extremely low thermal capacity, so that rapid preliminary cooking or boiling is possible with low power consumption.

Abstract: A mounting arrangement is provided for mounting a sensing box in an opening in an electric hot plate on which a cooking vessel is to stand. The sensing box is connected via a capillary tube to a controller and is pressed toward the cooking vessel by the force of a spring. The mounting arrangement comprises a holding member having a plurality of arms relative to which the sensing box is axially movable to a limited extent and which supports the pressing spring and holds resilient catch elements for securing the holding member on the hot plate. A spreader member limits the inward pressing of the sensing box into the opening by resting on the sensing box in its outer peripheral region.

Abstract: A control instrument is used for the manually continuously adjustable supply of electric power to electric hot plates in the form of individual power pulses. The control instrument contains a switch, operated by a bimetallic member, whose heater is controlled by an electronic circuit and supplies current to the heating means in individual half-waves. An automatic initial cooking device with an electronic timing member is provided which, during the initial cooking phase, reduces the power supply to heater in a predetermined ratio and consequently correspondingly increases the power supplied to the electric hot plate. The automatic initial cooking device is automatically switched on by the control instrument knob. By rotating the control knob beyond a median power limit the automatic initial cooking device is switched off.

Abstract: A power controller for controlling the intermittent supply of current to a load, such as a cooker hotplate, has a pivotally mounted snap switch controlled by a heated bimetal member which is heated in dependence upon the connected power. A compensating bimetal strip, for taking ambient temperature into account, is arranged on the snap switch and parallel thereto. A control cam acts on the free end of the compensating bimetal strip. The latter is shielded from the heat of the heated bimetal member.

Abstract: A power controller for controlling the intermittent supply of current to a load, such as a cooker hotplate, has a pivotally mounted snap switch controlled by a heated bimetal member which is heated in dependence upon the connected power. A compensating bimetal strip, for taking ambient temperature into account, is arranged on the snap switch and parallel thereto. A control cam acts on the free end of the compensating bimetal strip. The latter is shielded from the heat of the heated bimetal member.

Abstract: A power controller for controlling the intermittent supply of current to a load, such as a cooker hotplate, has a pivotally mounted snap switch controlled by a heated bimetal member which is heated in dependence upon the connected power. A compensating bimetal strip, for taking ambient temperature into account, is arranged on the snap switch and parallel thereto. A control cam acts on the free end of the compensating bimetal strip. The latter is shielded from the heat of the heated bimetal member.