Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Reexamination Certificate
2006-08-08
2006-08-08
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
C335S018000, C335S172000
Reexamination Certificate
active
07088207
ABSTRACT:
An electrical switching device for fault-current, overcurrent and short-circuit current protection, has a contact point in a current path and a switching mechanism for permanently opening the contact point. The switching device further has a configuration for detecting the fault current, the overcurrent and the short-circuit current, and contains two permanent magnets and a core. The core is disposed between the like poles of the permanent magnets which point toward one another and one of which is fixed and the other is guided such that it can move. The permanent magnets are at least partially surrounded by a coil through which a fault, an overcurrent or a short-circuit current flows. When a current flow occurs in the coil, the magnetic field is changed causing a relative movement of the moving part, and the movement is transmitted to the contact point.
REFERENCES:
patent: 4288770 (1981-09-01), Gillette
patent: 4301435 (1981-11-01), Castonguay et al.
patent: 6147422 (2000-11-01), Delson et al.
patent: 395 271 (1965-12-01), None
patent: 1 936 090 (1966-04-01), None
patent: 1 538 370 (1970-02-01), None
patent: 30 28 900 (1982-02-01), None
patent: 31 25 145 (1983-01-01), None
patent: 31 36 412 (1983-03-01), None
patent: 196 46 243 (1997-10-01), None
patent: 0 074 576 (1983-03-01), None
patent: 0 621 618 (1994-10-01), None
E. Kashy et al.: “A model to illustrate forces in nuclear fusion”,Am. J. Phys., vol. 62, No. 9, Sep. 1994, pp. 804-806.
Fritsch Klaus
Habedank Winrich
Kahl Walter
Puhr-Westerheide Jörg
Siedelhofer Bernd
ABB Patent GmbH
Donovan Lincoln
Greenberg Laurence A.
Locher Ralph E.
Stemer Werner H.
LandOfFree
Electrical switching device for fault-current, overcurrent... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrical switching device for fault-current, overcurrent..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical switching device for fault-current, overcurrent... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3715554