CA1197892A - Sealed thermostat sub-assembly - Google Patents
Sealed thermostat sub-assemblyInfo
- Publication number
- CA1197892A CA1197892A CA000434518A CA434518A CA1197892A CA 1197892 A CA1197892 A CA 1197892A CA 000434518 A CA000434518 A CA 000434518A CA 434518 A CA434518 A CA 434518A CA 1197892 A CA1197892 A CA 1197892A
- Authority
- CA
- Canada
- Prior art keywords
- kettle
- sub
- assembly
- chamber
- thermostat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Cookers (AREA)
Abstract
SEALED THERMOSTAT SUB-ASSEMBLY
ABSTRACT OF THE DISCLOSURE
A kettle having a thermostatic sensor to limit boiling of the kettle by switching off the kettle heating element upon the occurrence of boiling is provided with a thermostat sensor sub-assembly including a thermostatic switch secured within a split housing, having an interior O-ring seal to isolate the sensing portion from the electrical components, and an external O-ring seal serving to hold the sub-assembly in assembled relation, and to secure and seal the remote end portion of the assembly within its housing in the kettle.
ABSTRACT OF THE DISCLOSURE
A kettle having a thermostatic sensor to limit boiling of the kettle by switching off the kettle heating element upon the occurrence of boiling is provided with a thermostat sensor sub-assembly including a thermostatic switch secured within a split housing, having an interior O-ring seal to isolate the sensing portion from the electrical components, and an external O-ring seal serving to hold the sub-assembly in assembled relation, and to secure and seal the remote end portion of the assembly within its housing in the kettle.
Description
Case 2864 SEALED THERMOSTAT SUB-A~SEMBLY
This invention is directed to an electric kettle and in particular to an electric kettle embodying a thermostat sub-assembly module to limit boiling of the kettle.
In the provision of thermostatic switches an electric kettle for limiting the boiling of the kettles problems are experienced in providing thermostats suitable for assembly and for disassembly with the kettle. In the preferred kettle embodiment, the foregoing problems are fuxther complicated by the need to provide a thermostatic control embodying a reset capability.
In accordance with the present invention there is provided, for use with an electric kettle having a heating element for heatiny water to a boiling condition wherein steam is generated in the kettle, the kettle having a first chamber to receive at least a portion of the steam and a seconcl chamber extending in communicating relation with the first chamber, a thermostat sub-assembly module for insertion in substantially sealed relation within the kettle second chamber, to provide a temperature sensing connection with the first chamber, being responsive to the passage of steam therepast for switching off the kettle hea~ element.
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. ..
7B~
Case 2864 The preferred embodiment further provide~ a peripheral outer seal about the thermostat module to secure two halves of the module in assembled relation, and to effect sealing of the module within the kettle second chamber.
The subject module has a s~bstantially cylindrical body portion comprising two halves bounded by a mutual diametrical interface e~tending longitudinally of the body portion, having the aforementioned outer seal as an 0-ring extending in paxtially entered relation within a peripheral groove ex-tending substantially normally to the interface, about the outer surface of the module, to secure the two module halves in as6embled abutting relation.
Thare is further provided an internal seal within the module to isolate the temperature sensing portion of the module from an interior body portion thereof containing electrlcal connections. The internal seal, in the form of an 0-ring seal serves also to position the two halves of the body portion in virtually mating relation.
The thermostat portion of the module is positioned co-axially within the body portion having the temperature sensing end portion thereof extending in temperature sensiny relation within the kettle first chamber, when the module is assembled with ~he kettle, the module body portion extending within the kettle first chamber and having a flow passage therethrough with steam deflector means located in the passage to de1ect steam entering the first chamber and the module flow passage into heat exchanging relation with the thermostat sensing end portion.
Certain embodiments of the invention are described, reerence being had to the accompanying drawings, wherein;
~ 3~
Case 2864 Figure 1 is a side view in partial sec~ion of a kettle incorporating a ~hermostat module embodiment in accordance with the present invention7 Figure 2 is a general view showing the subject module prior ~o insertion within a housing in the kettle handle;
Figure 3 is a general view of internal components and the connecti.ng conduc-tors for the module;
Figure 4 is a general view of one half of the module having the internal component parts assembled therein, and Figure 5 is a front view of a portion of the module in the direction of arrow 5, shown in Figure 2, Figure 1 shows an electric kettle 20 having a thermostatic module 22 in accordance with the present invention located within a housing 24 of the kettle handle 26.
ReEerring to Figs. 2, 3 and 4 the module 22 comprises molded body halves 29, 31 having an elastomeric 0-ring 32 in securing relation thereabout, being located in a groove 34 extending about the external periphery of the body halves 29, 31.
Locating pins 57 and corresponding recesses serve to accurately index the two halves ~ogether.
Referring also to Figure 5 a pair of lugs 36 serve to retain the module 22 in secured and oriented relation within the recess 38 of handle 26, having the lower end portion 40 of the module 22 extending below the housing 24 and projecting into a steam-flow passageway indicated by the arrows 39.
The lower end portion 40 of the module 22 has a flow passage therethrough, with an en-try 42 and an exit 44~ The entry 42 includes a ramp deflector portion 46 for deflecting entering steam upwardly against the adjacent underface 48 of the thermostat ~7~
Case 2864 56. The lugs 36 align the entry 42 with entering steam flow within the handle recess.
Referring more particularly to Figs. 3 and 4 the interface 51 of ~he body half 31 is illustra~ed by section lining, in order to provide contrast, but is, in fact not a section but the as-cast interface between the two body halves 29, 31.
The thermostat sub-assembly 54 comprises the thermostat 56 with upstanding connector blades 58, a reset button 59, an elastomeric 0-ring 60, and a wiring harness comprising a pair of ~onnectors 62 having a tell-tale lamp 64 and a resistor 66 connected thereacross, with an insulated lead 68 comprising a pair of conductors connecting the thermostat 56 in series disconnecting relation with the kettle heating element circuit located in the base of the kettle.
A first aperture 70 in the top of module 22 provides a view of the lamp 64, and permits light therefrom to illuminate an overlying semi-opaque panel thereabove as an indication that boiling has taken place and the kettle is disconnected by tripping of the thermostat.
A second aperture 72 in the module 22 provides access for a reset member 74 secured to a lens reset button 76, for pushing down the reset button 59, to reset the thermostat 56.
It will be seen that the present invention provides a thermostat module 22 comprising a number of simple components adapted for ready assembly to provide a sealed sub-assembly wherein the interior 0-ring 60 serves to isolate the thermostat lower face 48 from the interior portion of the module 22 containing the electrical connections.
The exterior 0 ring 32 serves to secure the module 22 halves 29, 31 in assembled relation, for ready insertion within the kettle housing 38, with Case 2864 which it is sealed by the 0-ring 32~ Thus the O-ring 32 substantially precludes the upward leakage of steam ahout the outer surfaces of the module 22, so a~ to preserve a substantially dry environment for the electrical connectors 62, Thus, the disclosed arrangemen~ provides a thermostatic module particularly adapted for ease of pre-assembly, and for sealing insertion within its housing, wherein the sensing face of the module is substantially isolated by the module construction and its manner of mounting within the appliance to effectively preclude leaking of steam into that portion of the module containing electrical components. At the same time the module lends itself to facilated as~embly of ~he kettle, with correct orientation of the module in relation to the steam flow path to ensure satisfactory functioning of the thermostat.
The particulars of the thermostat reset actuating mechanism do not form a part of the present invention.
This invention is directed to an electric kettle and in particular to an electric kettle embodying a thermostat sub-assembly module to limit boiling of the kettle.
In the provision of thermostatic switches an electric kettle for limiting the boiling of the kettles problems are experienced in providing thermostats suitable for assembly and for disassembly with the kettle. In the preferred kettle embodiment, the foregoing problems are fuxther complicated by the need to provide a thermostatic control embodying a reset capability.
In accordance with the present invention there is provided, for use with an electric kettle having a heating element for heatiny water to a boiling condition wherein steam is generated in the kettle, the kettle having a first chamber to receive at least a portion of the steam and a seconcl chamber extending in communicating relation with the first chamber, a thermostat sub-assembly module for insertion in substantially sealed relation within the kettle second chamber, to provide a temperature sensing connection with the first chamber, being responsive to the passage of steam therepast for switching off the kettle hea~ element.
~J~
. ..
7B~
Case 2864 The preferred embodiment further provide~ a peripheral outer seal about the thermostat module to secure two halves of the module in assembled relation, and to effect sealing of the module within the kettle second chamber.
The subject module has a s~bstantially cylindrical body portion comprising two halves bounded by a mutual diametrical interface e~tending longitudinally of the body portion, having the aforementioned outer seal as an 0-ring extending in paxtially entered relation within a peripheral groove ex-tending substantially normally to the interface, about the outer surface of the module, to secure the two module halves in as6embled abutting relation.
Thare is further provided an internal seal within the module to isolate the temperature sensing portion of the module from an interior body portion thereof containing electrlcal connections. The internal seal, in the form of an 0-ring seal serves also to position the two halves of the body portion in virtually mating relation.
The thermostat portion of the module is positioned co-axially within the body portion having the temperature sensing end portion thereof extending in temperature sensiny relation within the kettle first chamber, when the module is assembled with ~he kettle, the module body portion extending within the kettle first chamber and having a flow passage therethrough with steam deflector means located in the passage to de1ect steam entering the first chamber and the module flow passage into heat exchanging relation with the thermostat sensing end portion.
Certain embodiments of the invention are described, reerence being had to the accompanying drawings, wherein;
~ 3~
Case 2864 Figure 1 is a side view in partial sec~ion of a kettle incorporating a ~hermostat module embodiment in accordance with the present invention7 Figure 2 is a general view showing the subject module prior ~o insertion within a housing in the kettle handle;
Figure 3 is a general view of internal components and the connecti.ng conduc-tors for the module;
Figure 4 is a general view of one half of the module having the internal component parts assembled therein, and Figure 5 is a front view of a portion of the module in the direction of arrow 5, shown in Figure 2, Figure 1 shows an electric kettle 20 having a thermostatic module 22 in accordance with the present invention located within a housing 24 of the kettle handle 26.
ReEerring to Figs. 2, 3 and 4 the module 22 comprises molded body halves 29, 31 having an elastomeric 0-ring 32 in securing relation thereabout, being located in a groove 34 extending about the external periphery of the body halves 29, 31.
Locating pins 57 and corresponding recesses serve to accurately index the two halves ~ogether.
Referring also to Figure 5 a pair of lugs 36 serve to retain the module 22 in secured and oriented relation within the recess 38 of handle 26, having the lower end portion 40 of the module 22 extending below the housing 24 and projecting into a steam-flow passageway indicated by the arrows 39.
The lower end portion 40 of the module 22 has a flow passage therethrough, with an en-try 42 and an exit 44~ The entry 42 includes a ramp deflector portion 46 for deflecting entering steam upwardly against the adjacent underface 48 of the thermostat ~7~
Case 2864 56. The lugs 36 align the entry 42 with entering steam flow within the handle recess.
Referring more particularly to Figs. 3 and 4 the interface 51 of ~he body half 31 is illustra~ed by section lining, in order to provide contrast, but is, in fact not a section but the as-cast interface between the two body halves 29, 31.
The thermostat sub-assembly 54 comprises the thermostat 56 with upstanding connector blades 58, a reset button 59, an elastomeric 0-ring 60, and a wiring harness comprising a pair of ~onnectors 62 having a tell-tale lamp 64 and a resistor 66 connected thereacross, with an insulated lead 68 comprising a pair of conductors connecting the thermostat 56 in series disconnecting relation with the kettle heating element circuit located in the base of the kettle.
A first aperture 70 in the top of module 22 provides a view of the lamp 64, and permits light therefrom to illuminate an overlying semi-opaque panel thereabove as an indication that boiling has taken place and the kettle is disconnected by tripping of the thermostat.
A second aperture 72 in the module 22 provides access for a reset member 74 secured to a lens reset button 76, for pushing down the reset button 59, to reset the thermostat 56.
It will be seen that the present invention provides a thermostat module 22 comprising a number of simple components adapted for ready assembly to provide a sealed sub-assembly wherein the interior 0-ring 60 serves to isolate the thermostat lower face 48 from the interior portion of the module 22 containing the electrical connections.
The exterior 0 ring 32 serves to secure the module 22 halves 29, 31 in assembled relation, for ready insertion within the kettle housing 38, with Case 2864 which it is sealed by the 0-ring 32~ Thus the O-ring 32 substantially precludes the upward leakage of steam ahout the outer surfaces of the module 22, so a~ to preserve a substantially dry environment for the electrical connectors 62, Thus, the disclosed arrangemen~ provides a thermostatic module particularly adapted for ease of pre-assembly, and for sealing insertion within its housing, wherein the sensing face of the module is substantially isolated by the module construction and its manner of mounting within the appliance to effectively preclude leaking of steam into that portion of the module containing electrical components. At the same time the module lends itself to facilated as~embly of ~he kettle, with correct orientation of the module in relation to the steam flow path to ensure satisfactory functioning of the thermostat.
The particulars of the thermostat reset actuating mechanism do not form a part of the present invention.
Claims (6)
1. In an electric kettle having a heating element for heating water to a boiling condition wherein steam is generated in the kettle, a first chamber to receive at least a portion of said steam, a second chamber extending in communicating relation from said first chamber, the improvement comprising a thermostat sub-assembly having a temperature sensing end portion for location in temperature sensing relation with said first chamber, peripheral seal means extending about the exterior of said sub-assembly for substantially sealing of at least a portion of said second chamber from said thermostat sensing end portion, and electrical circuit means within the sealed-off said second chamber portion connecting switching means of said thermostat sub-assembly in energizing controlling relation with said heating element.
2. The kettle as set forth in Claim 1, said sub-assembly peripheral seal comprising an O-ring located in partially inserted relation within a groove extending peripherally about said sub-assembly.
3. The kettle as set forth in Claim 2, said sub-assembly including a substantially cylindrical body portion comprising two halves having a diametrical interface extending longitudinally thereof, said peripheral seal groove extending substantially normally to said interface, whereby said O-ring seal secures said two halves in substantially abutting relation at said interface.
4. The kettle as set forth in Claim 3 said thermostat sub-assembly including a thermostat positioned co-axially within said body portion, said temperature sensing end portion extending in sensing relation to said first chamber, and an O-ring seal extending about said thermostat in sealing relation with said two halves of said body portion, to isolate said thermostat temperature sensing end portion from an interior portion of said body portion.
5. The kettle as set forth in Claim 4, said body portion extending within said first chamber including a flow passage therethrough having steam deflector means therein to deflect steam entering said first chamber and said flow passage into heat exchanging relation with said thermostat sensing end portion.
6. The kettle as set forth in Claim 3, said sub-assembly including attachment means for locating and securing the sub-assembly in oriented positioned relation within said kettle second chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000434518A CA1197892A (en) | 1983-08-12 | 1983-08-12 | Sealed thermostat sub-assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000434518A CA1197892A (en) | 1983-08-12 | 1983-08-12 | Sealed thermostat sub-assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1197892A true CA1197892A (en) | 1985-12-10 |
Family
ID=4125861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000434518A Expired CA1197892A (en) | 1983-08-12 | 1983-08-12 | Sealed thermostat sub-assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1197892A (en) |
-
1983
- 1983-08-12 CA CA000434518A patent/CA1197892A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |