Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2010-07-12
2011-12-27
Nguyen, Hung T. (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S500000, C340S506000, C340S522000, C340S568100, C219S445100, C219S446100
Reexamination Certificate
active
08085161
ABSTRACT:
An appliance warning system comprises a floor pad for location on or adjacent a device such that a user must stand on the floor pad in order to normally use the device. The floor pad has at least one switch movable between an open position when no weight pressure is detected on the floor pad and a closed position when the switch is activated by weight pressure detected on the floor pad. A control circuit is connected operational between a ready state before the switch is activated to the closed position and a monitoring state after the switch is activated to the closed position. A warning device connected to the control circuit is activated when the control circuit determines that the switch has been in the open position for a preselected period of time after having been in the closed position.
REFERENCES:
patent: 4577181 (1986-03-01), Lipscher et al.
patent: 5901961 (1999-05-01), Holland, III
patent: 2008/0084296 (2008-04-01), Kutzik et al.
Abrahams Coun P.
Nguyen Hung T.
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