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:
Sep. 11, 1984
Filed:
Mar. 10, 1983
Applicant:
Inventors:
Thaddeus S Wielgos, Des Plaines, IL (US);
Richard L Lauritsen, Hoffman Estates, IL (US);
Assignee:
The Singer Company, Stamford, CT (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
200 / ; 200 / ; 200 / ;
Abstract
A pressure switch has a solid piston sealed by a Kapseal and O-ring actuating a spring locator to compress a main spring and then a secondary (optional) spring. The locator actuates a slow moving end of a snap switch blade. The slow moving end has a contact which opens a low voltage circuit and then the snap switch end of the blade is actuated to open another circuit. This attains a single pole make make operation with sequencing assured.