Neon lamp isolation transformer for mid-point commoned neon lamps
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United States of America Patent
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Oct 6, 1998
Grant Date -
N/A
app pub date -
Nov 19, 1996
filing date -
Nov 19, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A low cost power supply with enhanced safety protection for neon lamps connected in a midpoint commoned lamp configuration. The power supply has a return path which is isolated from the earth ground so that a fault current does not flow from the output terminals to the earth ground. The windings are phased in a series opposing configuration such that the voltages between the output terminals sum to zero. This power supply of mid-point connected secondary coil design is capable of operating lamp lengths that typically require 15,000 volts of open circuit voltage while not exceeding 7500 volts to ground when any one output terminal is grounded.
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