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:
Dec. 06, 1977
Filed:
Feb. 09, 1976
Applicant:
Inventor:
Raymond F Lewandowski, Mount Prospect, IL (US);
Assignee:
Oak Industries Inc., Crystal Lake, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
338 / ; 335-2 ;
Abstract
A contactless linear motion switch has a housing and a Hall effect sensing circuit positioned within the housing. A plunger carrying a permanent magnet moves within the housing toward and away from the Hall effect sensing circuit. A concentrator is positioned within the housing and has a portion positioned adjacent the Hall effect sensing circuit and a further portion positioned in contact with the permanent magnet when the magnet is positioned away from the Hall effect sensing circuit.