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:
Apr. 04, 1978
Filed:
Oct. 07, 1976
Applicant:
Inventors:
Jean Denamps, Ausnieres, FR;
Jean LeCossec, Esbly, FR;
Assignee:
Robert Bosch GmbH, Stuttgart, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
307118 ; 200 / ; 200 / ; 340 58 ;
Abstract
To provide positive on-off switching when a pneumatic pressure threshold is passed, a movable switching element is magnetically attracted by a moving magnet, movable under force of a pressure diaphragm subjected to the pneumatic pressure. The movable switch element itself is biassed away from the magnet by a spring which is weaker than the restoring spring counteracting the pneumatic pressure. The non-linear displacement-force characteristics of the magnet cause snap action of the movable switch element, thus providing positive switching at accurately predeterminable pressure positions.