One-shot heat sensing electrical receptacle
An electrical receptacle senses its operating temperature and automatically turns off when the temperature rises above a predetermined threshold. The receptacle has a button that visually indicates when the receptacle has reached its temperature threshold. After automatically turning off, the receptacle remains permanently non-conducting.
1. An electrical receptacle, comprising:
a line terminal having a first contact and a bimetallic dish,
a feed terminal having a second contact, and
an overload button assembly having
(a) a columnar housing with
(i) a top surface having a hole,
(ii) an extension portion located on one side of the columnar housing, the extension Portion having an arm at its distal end, and
(iii) a cavity extending the full height of the columnar housing and terminating on the top surface at the hole,
(b) a cylindrical button having a top surface for protruding through the hole in the columnar housing, and a body located in an upper portion of the cavity in the columnar housing, and
(c) a spring located in a lower portion of the cavity in the columnar housing,
wherein,
in a normal reset state, the bimetallic dish bends inward so that the first and second contacts touch and the overload button assembly is in an untripped postion, and
in a tripped state, the bimetallic dish bends outward enabling the spring to push the arm of the overload button assembly between the first and second contacts so that the overload button assembly moves to a tripped position wherein the columnar housing is unaffected by movement of the cylindrical button, thereby permanently preventing the first contact from touching the second contact.
2. The electrical receptacle of claim 1 , further comprising a faceplate, and wherein the overload button extends outward from the faceplate while in the tripped state.
3. The electrical receptacle of claim 1 , wherein the overload button visually indicates when the electrical receptacle is in a tripped state.
4. The electrical receptacle of claim 1 , wherein the bimetallic dish changes from bending inwards to bending outwards at a predetermined temperature.
5. The electrical receptacle of claim 1 , wherein the bimetallic dish is shallow and not dome-shaped.
6. The electrical receptacle of claim 1 , wherein the electrcal receptacle has at least two outlets, and in the tripped state, power is prevented from flowing in all of the at least two outlets.