Communications: electrical – Condition responsive indicating system – Specified housing
Reexamination Certificate
2004-12-11
2008-08-05
Nguyen, Tai (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specified housing
C340S693900, C340S693110, C340S426240, C340S464000, C362S085000, C362S095000, C362S324000
Reexamination Certificate
active
07408476
ABSTRACT:
An emergency shut-off system includes an emergency shut-off switch cover plate with a hinged cover that cooperates with a conventional emergency shut-off switch to help prevent the unintended shut-down of a pool or spa water pumping system. The emergency shut-off switch cover plate and hinged cover function in one mode of operation to prevent the unintended shutdown of the pumping system. In another mode of operation, the emergency shut-off cover plate and hinged cover provide a user with a immediate sensory indication that the pumping system is shut-down and needs to be re-activated. The sensory indication can be either a highly visual indication or in the alternative a combination of the highly visual indication with an audible sensory indication.
REFERENCES:
patent: 4267549 (1981-05-01), Taylor
patent: 4739187 (1988-04-01), Nelson et al.
patent: 5775456 (1998-07-01), Reppas
patent: 6000807 (1999-12-01), Moreland
patent: 6044257 (2000-03-01), Boling et al.
patent: 6059536 (2000-05-01), Stingl
Nguyen Tai
Steins & Associates, P.C.
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