The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 1986
Filed:
Jul. 20, 1984
Stephen P Johnston, Detroit Lakes, MN (US);
S. J. Electro Systems, Inc., Detroit Lakes, MN (US);
Abstract
The present invention relates to a mercury switch (10) including an outer metal housing (12) having a closed end and an open end. A baffle member (14) is positioned in the housing (12) immediate of the closed and open ends. The baffle member (14) defines a first bore (32), a second bore (34) of increasing diameter in a direction toward the open end of the housing (12), and a third bore (36). An electrode assembly (16) is partially inserted into the open end of the housing (12). The electrode assembly includes a solid electrode (40) having a stem portion (42) and a head portion (44) with a truncated conical configuration of decreasing diameter in a direction toward the closed end of the housing (12) and having a recessed surface 102 providing a mercury wetting reservoir. The baffle member (14) and the truncated conical head portion (44) cooperate to provide contact between a first supply of mercury (30a) and the solid electrode (40) at a location removed from an insulating member (46). The electrode assembly (16) includes a metal weld ring member (50) which is suitably secured to the housing (12).