US 4,901,049 A · Temperature limiter · patentgrep

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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).

Claims39

Dependent claims

A temperature limiter for a heating system, comprising:

a base member;
a substantially rod-like temperature sensor having at least one outer tube and an inner rod member arranged in said outer tube, said outer tube and said inner rod member having different thermal expansion coefficients, said inner rod member having an outer end portion remote from said base member;
at least one switch means arranged on said base member and provided for operation by said temperature sensor;
and,
an insulating means directly surrounding the inner rod member and providing an abutment for said outer end portion of the inner rod member, and wherein said insulating means is provided by said outer tube being an insulating member, said inner rod manner being constructed as a pressure rod provided for transferring compressive forces, said inner rod member being supported on said insulating member provided for tensile-stress under the compressive forces of said inner rod member, said insulating member having an inner end portion fixed to the base member and an outer end portion, means being provided for fixing said inner end portion of said insulating member to prevent movement in a direction towards the outer end portion.

2 more elements

A temperature limiter for a heating system, comprising:

a base member;
a substantially rod-like temperature sensor having at least one outer tube and an inner rod member arranged in said outer tube, said outer tube and said inner rod member having different thermal expansion coefficients, said inner rod member having an outer end portion remote from said base member;
at least one switch means arranged on said base member and provided for operation by said temperature sensor;
and,
an insulating means directly surrounding the inner rod member and providing an abutment for said outer end portion of the inner rod member, and wherein said insulating means is provided by said outer tube being an insulating member, said inner rod member being constructed as a pressure rod provided for transferring compressive forces, said inner rod member being supported on said insulating member provided for tensile-stress under the compressive forces of said inner rod member, said insulating member having an inner end portion fixed to the base member and an outer end portion, means being provided for fixing said inner end portion of said insulating member to prevent movement in a direction towards the outer end portion, said outer end portion of said inner rod member being supported against said insulating member via an intermediate member and an adjustment member, said insulating member defining an insulating tube, said inner rod member being located within said insulating tube.

2 more elements

A temperature limiter for a heating system, comprising:

a base member;
a substantially rod-like temperature sensor having at least one outer tube and an inner rod member arranged in said outer tube, said outer tube and said inner rod member having different thermal expansion coefficients, said inner rod member having an outer end portion remote from said base member;
at least one switch means arranged on said base member and provided for operation by said temperature sensor, wherein said switch means comprises at least two switches operated by said temperature sensor, an inner end portion of said inner rod member operating a first operating member provided for operating at least one first switch of said at least two switches, said inner end portion operating a second operating member provided for operating at least one second switch of said at least two switches, said first and second operating members engaging on operating counter-members of said at least two switches providing switch assembly parts, at least one of said switch assembly parts having an opening at least partly traversed by a transfer member provided for operating said second operating member, said first operating member being located closer to said temperature sensor than said second operating member, said transfer member being formed by a component connected to said inner rod member, said second operating member being coupled to said transfer member and being guided in an oriented manner by a restoring spring, said first and second operating members having two facing operating faces, an adjustment member for adjusting said first and second operating members with respect to each other being mounted with said second operating member and having an adjusting thread.

A temperature limiter for a heating system, comprising:

a base member;
a substantially rod-like temperature sensor having at least one outer tube and an inner rod member arranged in said outer tube, said outer tube and said inner rod member having different thermal expansion coefficients, said inner rod member having an outer end portion remote from said base member;
at least one switch means arranged on said base member and provided for operation by said temperature sensor, wherein said switch means comprises at least two switches operated by said temperature sensor, an inner end portion of said inner rod member operating a first operating member provided for operating at least one first switch of said at least two switches, said inner end portion operating a second operating member provided for operating at least one second switch of said at least two switches, said first and second operating members engaging on operating counter-members of said at least two switches providing switch assembly parts, at least one of said switch assembly parts having an opening at least partly traversed by a transfer member provided for operating said second operating member, said first operating member being located closer to said temperature sensor than said second operating member, said first and second operating members being located at a distance with respect to each other, means being provided for varying said distance, said means having a displaceably mounted adjustment member.

A temperature limiter for a heating system, comprising:

a base member;
a substantially rod-like temperature sensor having at least one outer tube and an inner rod member arranged in said outer tube, said outer tube and said inner rod member having different thermal expansion coefficients, said inner rod member having an outer end portion remote from said base member;
at least one switch means arranged on said base member and provided for operation by said temperature sensor, wherein said switch means comprises at least two switches operated by said temperature sensor, an inner end portion of said inner rod member operating a first operating member provided for operating at least one first switch of said at least two switches, said inner end portion operating a second operating member provided for operating at least one second switch of said at least two switches, said first and second operating members engaging on operating counter-members of said at least two switches providing switch assembly parts, at least one of said switch assembly parts having an opening at least partly traversed by a transfer member provided for operating said second operating member, said first operating member being located closer to said temperature sensor than said second operating member, further comprising an insulating means directly surrounding the inner rod member and providing an abutment for said outer end portion of the inner rod member, said insulating means being defined by said outer tube being an insulating member, said inner rod member being constructed as a pressure rod provided for transferring compressive forces, said inner rod member being supported on said insulating member provided for tensile-stress under the compressive forces of said inner rod member, said insulating member having an inner end portion fixed to the base member and an outer end portion, means being provided for fixing said outer end portion of said insulating member to prevent movement in a direction towards the outer end portion.

Dependencies are inferred from the claim text.