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:
Aug. 09, 1988
Filed:
Nov. 14, 1986
John O Roeser, Barrington, IL (US);
Otto Engineering, Inc., Carpentersville, IL (US);
Abstract
A precision subminiature, snap action switch and an externally actuated, heavy duty, spring loaded self-return type operator therefor are enclosed within an hermetically sealed housing. The operator employs a switch actuating cam having shoulders cooperable with shoulders on the interior of the housing to define the limits of cam movement, said cam also having a shoulder cooperable with a shoulder on a switch lever to trip the switch upon movement of the externally actuated operator shaft a precise amount away from its at rest position. A connector/switch subassembly sealingly closes a housing opening, provides a rigid, precision mounting for the switch, and also provides external electrical connections for the switch. The operator has an externally projecting shaft which extends through a shaft bearing/rotary seal assembly employing a silicone rubber O-ring member and oil for lubricating a shaft bearing and the O-ring member, there being additional polytetrafluoroethylene O-ring members which prevent escape of the lubricating oil. An end cap sealingly closes another housing opening, provides a bearing for the inner end of the operator shaft, and exerts a predetermined stress on the operator spring. The structure lends itself to a simplified fabrication method.