Combustion – Timer – programmer – retarder or condition responsive control – With test circuit checking or analyzing flame sensing...
Reexamination Certificate
2006-03-07
2006-03-07
Price, Carl D. (Department: 3749)
Combustion
Timer, programmer, retarder or condition responsive control
With test circuit checking or analyzing flame sensing...
C431S006000, C431S018000, C431S025000
Reexamination Certificate
active
07008217
ABSTRACT:
A safety device for an industrial boiler (CHA) including electromechanical relays (REn, RS), which are connected in series in order to form an electromechanical safety chain (CH1), and at least one shunt relay (RTn) which is normally open and mounted in parallel to one of the electromechanical relays (REN). The shunt relay is controlled by an automaton (AP1) so that it is closed during a time delay. The shunt relay (RTn) is provided with a contact that is connected to an electronic circuit (CEn) and said electronic circuit (CEn) opens an electromechanical relay (RS) which is mounted in series in the safety chain when the shunt relay (RTn) 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.
REFERENCES:
patent: 3576556 (1971-04-01), Sellors, Jr.
patent: 3958126 (1976-05-01), Bryant
patent: 4101258 (1978-07-01), Jacobsz
patent: 4268884 (1981-05-01), Ford et al.
patent: 4298334 (1981-11-01), Clark et al.
patent: 4303383 (1981-12-01), Black et al.
patent: 4459099 (1984-07-01), Grunden et al.
patent: 4518345 (1985-05-01), Mueller et al.
patent: 4581697 (1986-04-01), Jamieson et al.
patent: 4604046 (1986-08-01), Mueller et al.
patent: 5307050 (1994-04-01), Patton et al.
patent: 5506569 (1996-04-01), Rowlette
patent: 5749718 (1998-05-01), Berlincourt
patent: 6600960 (2003-07-01), Keegan
patent: 35 32 229 (1987-02-01), None
patent: 37 04 062 (1988-08-01), None
Alstom (Switzerland) LTD
Price Carl D.
LandOfFree
Safety device for boiler comprising a time delay protected... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Safety device for boiler comprising a time delay protected..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety device for boiler comprising a time delay protected... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3609613