Electric heating – Heating devices – With power supply and voltage or current regulation or...
Reexamination Certificate
2011-01-11
2011-01-11
Paschall, Mark H (Department: 3742)
Electric heating
Heating devices
With power supply and voltage or current regulation or...
C219S494000, C219S504000, C219S491000, C219S446100, C219S443100
Reexamination Certificate
active
07868271
ABSTRACT:
A control device for converting a control movement along a control path into a control signal has the control path corresponding to different control stages or control types. The control device has two measuring tracks with a linearly changing resistance associated with each track. In one embodiment, these measuring tracks are positioned concentric to each other in a semicircle. A voltage U, which is tapped via two opposite interconnected sliders, is applied to both measuring tracks at a junction point while the other junction point is connected to ground. If the detected values of the tapped voltages deviate from a corresponding stored value or pairs of values, there must be a fault, due to, for example a broken slider. This makes it possible to perform a test for determining the fault or a malfunctioning control device.
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Baier Martin
Dorwarth Ralf
Hamm Wolfgang Alfred
Alston & Bird LLP
E.G.O. Elektro-Geraetebau GmbH
Paschall Mark H
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