GB2043875A

GB2043875A - Electric Cookers

Info

Publication number: GB2043875A
Application number: GB8001644A
Authority: GB
Original assignee: STEWA FORSCHUNG AG
Current assignee: STEWA FORSCHUNG AG
Priority date: 1979-01-31
Filing date: 1980-01-17
Publication date: 1980-10-08
Also published as: IT1129681B; DK20080A; DE3001845A1; BE881384A; SE8000503L; YU19380A; FR2448110A1; JPS55130091A; NL8000590A; IT8019538A0

Abstract

On electric cookers, the cooker plate and the troughs carrying the hotplates do not consist of a solid whole but of several parts which are detachably connected and fitted by fastening means. In order to simplify and reduce the cost of the production as well as the assembly, there is provided an electric cooker on which the cooker plate (1) and the troughs (2), which carry the hotplates (3), are formed together from a single formed unit. The troughs (2), which are integrally formed with the cooker plate (1) each comprise a wall (4) which is transversely directed to and reinforces the cooker plate. The electric connection parts are protected by a cover member (6) which has been formed by the deformation of the trough bottom (5). <IMAGE>

Description

SPECIFICATION Electric Cookers On all known electric cookers provided with hotplates which are arranged in troughs, the latter consist of a piurality of individually assembled parts. The troughs are secured to the underside of the cooker plate by connection elements, such as screws. For this purpose, a special steel tank, reinforcing embossings in the cooker plate, adjusting screws located in the trough and engaging in the underside of the hotplate and lock nuts were necessary. The large number of components required increase the costs for the production considerably, and the expenditure of time for the assembly is high. The fastening arrangement of the troughs relative to the cooker plate may become ioose or even undone as a result of vibrations so that the troughs, including the hotplates, are given play and thus lose their original stability.It was also impossible to exchange the hotplates quickly, and the exact fitting-in thereof was not easy to perform.

The present invention relates to an electric cooker having a cooker plate and hotplates inserted therein and on which there are provided pot-like single-part troughs which serve for the at least partially flush reception and fixing of the hotplates and are formed by the deformation of the cooker plate and jut out downwardly, each trough having a wall which is transverse to the cooker plate and reinforces the latter from the bottom, and there being furthermore provided on the trough bottom a cover member which is again formed by deformation and which protects the electric connection parts of the hotplates.

Two constructional forms of the subject matter of the invention are shown by way of example in the drawings, in which: Figure 1 shows a cooker plate provided with a single-part trough, as viewed from the underside, Figure 2 shows a vertical section along the line Il-Il in Fig. 1, and Figure 3 shows a vertical section like that of Fig. 2 of a second constructional form of the cooker plate.

The cooker plate 1 shown in Figs. 1 and 2 comprises at least one pot-like single-part trough 2 which has been formed by deformation of the latter and projects downwardly and serves for the flush reception and fixing of the hotplate. Each single-part trough 2 has a wall 4 which is transverse to the cooker plate 1 and stiffens the latter from the bottom. Furthermore, there is provided on the trough bottom 5 a cover member 6 which has again been formed by deformation of the latter and which protects the electric plug-in and connection elements of the hotplate 3. The cover member 6 forms a bulge in the trough bottom 5 and has on the outside the access aperture 6' for the conventional electric connection parts, which are not shown. As shown in Fig. 2, ring-like offsets 7', which are also formed by deformation, are provided on the upper edge of the wall 4.These offsets 7' form ring-like seating surfaces which serve for the seating of outwardly projecting flanges 3' of the hotplates as well as heat-resistant sealing rings consisting of soft metal, such as lead. 8 designates an aperture which is provided in the central portion of the trough bottom 5 and which serves for the later insertion of a conventional thermotransmitter or thermostat.

In the constructional form shown in Fig. 3, the single-part trough 2 is integrally formed with the cooker plate 1 so that it provides a raised position of the hotplate 3. For this purpose, there is provided between the cooker plate 1 and the single-part trough 2 a ring shoulder 7 which is also formed by deformation, tapers upwardly, embraces the hotplate 3 and forms a spillway edge, the cooker plate 1, the single-part trough 2 and the ring shoulder 7 consisting of a single piece. The ring shoulder 7 has a ring-like offset 7' on the upper ring edge of the wall 4, which offset has again been formed by deformation and forms a seating surface for the outwardly directed flange 3' of the hotplate 3. Advantageously, a sealing ring in a soft metal, such as lead, can be inserted between the flange 3' and the offset 7'.In the centre, the trough bottom 5 is provided beneath the hotplate 3 and at a distance therefrom with an aperture 8 as well as with passages 9 for the fastening screws 10, which are anchored in the hotplate 3, including the nuts 10'. As in the example shown in Fig. 1, the aperture 8 serves for the insertion at a later time of a thermotransmitter or thermostat.

The electric cooker described is suitable for purposes of any kind. A cooker plate with the integrally formed troughs forms a prefabricated installation unit which, compared with the prior art constructions, is distinguished by a tremendously increased stability. The mentioned installation unit (single-part trough, cooker plate) can be produced in one operation with a single forming die. Practical experience has shown that, in conjunction with the faster possibility of assembly, a cost saving of more than 20% is achieved. In addition, the troughs form with the cooker plate a solid and undetachable whole, which ensures the secure arrangement and mounting of the hotplates. Thanks to the integral unit of the cooker plate with the associated troughs, it is possible to effect the replacement of defective and worn hotplates quickly, accurately and without any complicated adjustment work.

Claims

1. An electric cooker provided with a cooker plate and at least one hotplate inserted therein, said cooker plate comprising a trough which serves for the at least partially flush reception and fixing of the hotplate, said trough being formed by the deformation of the cooker plate and extending downwardly, each trough having a bottom, a wall which extends transverse to the cooker plate and reinforces the latter from beneath and a cover member on the trough bottom, which is again

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Electric Cookers On all known electric cookers provided with hotplates which are arranged in troughs, the latter consist of a piurality of individually assembled parts. The troughs are secured to the underside of the cooker plate by connection elements, such as screws. For this purpose, a special steel tank, reinforcing embossings in the cooker plate, adjusting screws located in the trough and engaging in the underside of the hotplate and lock nuts were necessary. The large number of components required increase the costs for the production considerably, and the expenditure of time for the assembly is high. The fastening arrangement of the troughs relative to the cooker plate may become ioose or even undone as a result of vibrations so that the troughs, including the hotplates, are given play and thus lose their original stability.It was also impossible to exchange the hotplates quickly, and the exact fitting-in thereof was not easy to perform. The present invention relates to an electric cooker having a cooker plate and hotplates inserted therein and on which there are provided pot-like single-part troughs which serve for the at least partially flush reception and fixing of the hotplates and are formed by the deformation of the cooker plate and jut out downwardly, each trough having a wall which is transverse to the cooker plate and reinforces the latter from the bottom, and there being furthermore provided on the trough bottom a cover member which is again formed by deformation and which protects the electric connection parts of the hotplates. Two constructional forms of the subject matter of the invention are shown by way of example in the drawings, in which: Figure 1 shows a cooker plate provided with a single-part trough, as viewed from the underside, Figure 2 shows a vertical section along the line Il-Il in Fig. 1, and Figure 3 shows a vertical section like that of Fig. 2 of a second constructional form of the cooker plate. The cooker plate 1 shown in Figs. 1 and 2 comprises at least one pot-like single-part trough 2 which has been formed by deformation of the latter and projects downwardly and serves for the flush reception and fixing of the hotplate. Each single-part trough 2 has a wall 4 which is transverse to the cooker plate 1 and stiffens the latter from the bottom. Furthermore, there is provided on the trough bottom 5 a cover member 6 which has again been formed by deformation of the latter and which protects the electric plug-in and connection elements of the hotplate 3. The cover member 6 forms a bulge in the trough bottom 5 and has on the outside the access aperture 6' for the conventional electric connection parts, which are not shown. As shown in Fig. 2, ring-like offsets 7', which are also formed by deformation, are provided on the upper edge of the wall 4.These offsets 7' form ring-like seating surfaces which serve for the seating of outwardly projecting flanges 3' of the hotplates as well as heat-resistant sealing rings consisting of soft metal, such as lead. 8 designates an aperture which is provided in the central portion of the trough bottom 5 and which serves for the later insertion of a conventional thermotransmitter or thermostat. In the constructional form shown in Fig. 3, the single-part trough 2 is integrally formed with the cooker plate 1 so that it provides a raised position of the hotplate 3. For this purpose, there is provided between the cooker plate 1 and the single-part trough 2 a ring shoulder 7 which is also formed by deformation, tapers upwardly, embraces the hotplate 3 and forms a spillway edge, the cooker plate 1, the single-part trough 2 and the ring shoulder 7 consisting of a single piece. The ring shoulder 7 has a ring-like offset 7' on the upper ring edge of the wall 4, which offset has again been formed by deformation and forms a seating surface for the outwardly directed flange 3' of the hotplate 3. Advantageously, a sealing ring in a soft metal, such as lead, can be inserted between the flange 3' and the offset 7'.In the centre, the trough bottom 5 is provided beneath the hotplate 3 and at a distance therefrom with an aperture 8 as well as with passages 9 for the fastening screws 10, which are anchored in the hotplate 3, including the nuts 10'. As in the example shown in Fig. 1, the aperture 8 serves for the insertion at a later time of a thermotransmitter or thermostat. The electric cooker described is suitable for purposes of any kind. A cooker plate with the integrally formed troughs forms a prefabricated installation unit which, compared with the prior art constructions, is distinguished by a tremendously increased stability. The mentioned installation unit (single-part trough, cooker plate) can be produced in one operation with a single forming die. Practical experience has shown that, in conjunction with the faster possibility of assembly, a cost saving of more than 20% is achieved. In addition, the troughs form with the cooker plate a solid and undetachable whole, which ensures the secure arrangement and mounting of the hotplates. Thanks to the integral unit of the cooker plate with the associated troughs, it is possible to effect the replacement of defective and worn hotplates quickly, accurately and without any complicated adjustment work. Claims

1. An electric cooker provided with a cooker plate and at least one hotplate inserted therein, said cooker plate comprising a trough which serves for the at least partially flush reception and fixing of the hotplate, said trough being formed by the deformation of the cooker plate and extending downwardly, each trough having a bottom, a wall which extends transverse to the cooker plate and reinforces the latter from beneath and a cover member on the trough bottom, which is again formed by deformation and serves to protect the electric connection parts of the hotplate.

2. A cooker as claimed in claim 1, wherein the hotplate is detachably fixed on the trough bottom by means of connection elements which are anchored in the plate.

3. A cooker as claimed in claim 1 or 2, wherein the cover member is hood-shaped and has an access for the electric connection parts.

4. A cooker as claimed in claim 1, 2 or 3 wherein between the cooker plate and the singiepart trough there are provided shoulders which are also formed by deformation, taper upwardly and embrace the hotplate, the cooker plate, the single-part trough and the shoulders consisting of a single formed piece.

5. A cookers claimed in claim 1, 2 or 3, wherein the upper edge of the trough is formed with a ring-like offset which is also formed by deformation, said hot plate having outwardly directed flanges seating on the offset.

6. A cooker as claimed in any one of the preceding claims, wherein heat-resistant coverings made of soft metal are provided on the seating surfaces of the offset.

7. A cooker as claimed in any one of the preceding claims, wherein the trough bottom has at least one aperture beneath the hotplate at a distance therefrom.

8. A cooker as claimed in any one of the preceding ciaims, wherein the trough bottom has bores for the passage of the fastening screws of the hotplate.

9. A cooker as claimed in any one of the preceding claims, wherein the trough bottom comprises in the central portion an aperture which serves for the introduction of a thermotransmitter at a later stage of assembly.

10. An electric cooker substantially as described herein with reference to the accompanying drawings.