Display apparatus for a first out type of fault status annunciator having a series of interlock switches
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United States of America Patent
Stats
-
Apr 26, 1994
Grant Date -
N/A
app pub date -
Jun 3, 1992
filing date -
Jun 3, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An annunciator for the status of interlock switches connected into a series circuit for supplying power from a power source to a load, includes a memory recording the status of each switch at a selectable instant. A plurality of display elements are arranged in a pattern corresponding to the pattern of the interlock switch circuit. A manually operable switch allows a user to select for graphically showing with the display either the switch status recorded by the memory or the current status of the switches. The signals controlling the display are conditioned so that the particular display element assigned to the first out switch as recorded in the memory flashes to indicate the switch closest to the power source which was not conducting at the selectable instant.
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Cited Art Landscape
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