Signals and indicators – Indicators – Fluid flow
Patent
1990-12-21
1992-01-07
Cuchlinski, Jr., William A.
Signals and indicators
Indicators
Fluid flow
116266, 361 37, G01L 1912, G08B 518, H01H 950
Patent
active
050780786
ABSTRACT:
A warning indicator provides an indication that a transient over-pressure condition has occurred in a transformer. The indicator takes into account small or slow pressure changes and only indicates pressure surges. The internal arcing warning indicator comprises an opening in a casing of a transformer, a movable piston over the opening with a retainer to retain the piston over the opening, the piston having at least one small aperture therein to allow slow increases and decreases of pressure within the transformer without the piston moving, and an indicator attached to the piston, the indicator providing an indication that the piston has moved a predetermined distance and retaining the indication until reset.
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Cuchlinski Jr. William A.
Powertech Labs Inc.
Worth W. Morris
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