Title: Normally open, thermal sensitive electrical switching device

Abstract: A temperature sensitive normally open electrical switching device has a pair of normally isolated, current carrying leads. A casing defines a central cavity and encloses first and second electrodes which are electrically connected to separate ones of the leads. An electrically conductive, fusible pellet is positioned in the cavity and melts at a predetermined temperature to form an electrically conductive path between the electrodes, regardless of the orientation of the device. The first electrode is concave and the second electrode extends into the concavity formed by the first electrode.

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Inventors: Saini, Sarmukh S. (Dayton, OH, US)

Application Number: 801746
Filing Date: 1977-05-31
Publication_date: 1979-07-10
Assignee: Emerson Electric Co. (Dayton, OH)
Primary Class(es): 337/404 337/401
Other Classes:
US Patent Ref:

2709210	May, 1955	Newhal, Jr.	337/401.
4009422	Feb, 1977	Woodfill	361/129.

Other Refs:
Primary Examiner: Broome, Harold
Assistant Examiner:
Attorney: Biebel, French & Nauman