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:
Mar. 07, 2006
Filed:
May. 17, 2002
Charles Jacobberger, Storckensohn, FR;
Charles Jacobberger, Storckensohn, FR;
ALSTOM Switzerland Ltd, Baden, CH;
Abstract
A safety device for an industrial boiler (CHA) including electromechanical relays (RE, RS), which are connected in series in order to form an electromechanical safety chain (CH), and at least one shunt relay (RT) which is normally open and mounted in parallel to one of the electromechanical relays (RE). The shunt relay is controlled by an automaton (AP) so that it is closed during a time delay. The shunt relay (RT) is provided with a contact that is connected to an electronic circuit (CE) and said electronic circuit (CE) opens an electromechanical relay (RS) which is mounted in series in the safety chain when the shunt relay (RT) is closed for longer than the time delay. Given the arrangement, in the event of an automaton failure, the time delay is ensured by the electronic circuit so that a satisfactory level of safety is guaranteed in relation to the installation.