Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Reexamination Certificate
2011-04-26
2011-04-26
Fureman, Jared J (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
Reexamination Certificate
active
07933104
ABSTRACT:
A safety switching apparatus for failsafe disconnection of an electrical load has a first and a second connecting terminal for connecting a first signaling switch and a third and a fourth connecting terminal for connecting a second signaling switch. It also has a first and a second output switching element, which are designed to produce a redundant output switching signal. The first connecting terminal is connected to a first potential and the third connecting terminal is connected to a second potential. The potentials differ from one another. In addition, the second connecting terminal is coupled to the first switching element in such a way that the first switching element receives the first potential via the first signaling switch. Likewise, the fourth connecting terminal is coupled to the second switching element in such a way that the second switching element receives the second potential via the second signaling switch. According to one aspect of the invention, a circuit arrangement is provided for determining at least one further potential at the second and/or fourth connecting terminal, and said circuit arrangement is designed to control the redundant output switching signal as a function of the further potential.
REFERENCES:
patent: 3794950 (1974-02-01), Kilner
patent: 5790391 (1998-08-01), Stich et al.
patent: 5894274 (1999-04-01), Kienapfel et al.
patent: 6051894 (2000-04-01), Shimogama
patent: 6198612 (2001-03-01), Männer
patent: 2001/0024125 (2001-09-01), Groenewold et al.
patent: 2001/0027352 (2001-10-01), Morita et al.
patent: 44 23 704 (1995-10-01), None
patent: 197 02 009 (1998-07-01), None
patent: 198 05 722 (1999-09-01), None
patent: 100 33 073 (2001-08-01), None
patent: 197 58 332 (2005-05-01), None
patent: 1 307 793 (2004-03-01), None
Pilz; Operating Instructions No. 19 238-01, pp. 1-6, Nov. 2004.
Bauer Ralf
Hornung Guenter
Nitsche Thomas
Fureman Jared J
Harness & Dickey & Pierce P.L.C.
Ieva Nicholas
Pilz GmbH & Co. KG
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