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:
Jan. 16, 1979
Filed:
Apr. 14, 1977
Brown, Boveri & Cie Aktiengesellschaft, Mannheim-Kafertal, DE;
Abstract
An electric wiring switch having an electromagnetic open-circuit shunt tripping device with a magnet armature that, when the tripping device is tripped, acts upon a latching shaft to release a latch upon the ocurrence of a fault current in an electrical circuit wherein the switch is connectible, and also having an indicating device lastingly indicating the tripping of the open circuit shunt tripping device, an operating button displaceable between a first position thereof wherein the switch is in an 'on' condition and the operating button is spring loaded, and a second position thereof wherein the switch is in an 'off' condition and the operating button is released from the spring loading, the operating button being formed with projection means extending therefrom which, in the 'on' condition of the switch, are engaged behind corresponding extension means extending from the latching shaft for firmly retaining the operating button in the first position thereof, and which, in the 'off' condition of the switch, after the operating button is in the second position thereof, are engaged with the extension means of firmly retaining the latching shaft in a released position thereof which is assumed thereby when the tripping device is tripped.