Detection and indication device
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United States of America Patent
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-
Jun 3, 1980
Grant Date -
N/A
app pub date -
Nov 13, 1978
filing date -
Nov 18, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for indicating the presence of electrically conducting particles, such as metal detritus, in a liquid such as hydraulic oil passing through a filter in which a gap is provided adjacent the filter into which metal particles are swept by the liquid flow to form a conducting bridge in an electrical circuit. In a preferred embodiment, an annular gap closed to through flow is provided between an insulated metal ring around a filter element and the wall of the flow passage surrounding the filter, and the ring and the wall are connected to an electrical circuit for actuating a warning light or audible alarm when the gap is bridged.
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