Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1986-07-02
1988-03-01
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
324 61R, 73 64, 384624, G08B 2100
Patent
active
047289430
ABSTRACT:
Means for determining the state of lubrication in surfaces lubricated by a lubricant and rolling or sliding with respect to one another, provided with a unit for generating a signal dependent upon the capacitance between the lubricated surfaces, characterized by an operating circuit connected to the unit which, in response to the signal dependent upon the capacitance, emits a second signal which is dependent in accordance with a non-linear, for example, exponential, function upon the capacitance between the lubricated surfaces such as that one and the same relative variation in the thickness of the lubricant between the lubricated surfaces results in a fairly great signal variation in the event of decreasing thickness, the second signal being supplied to an integrator which integrates the second signal over an integration period displaced in time and the output signal of which indicates the state of lubrication.
REFERENCES:
patent: 4060965 (1977-12-01), Schwartz
patent: 4345203 (1982-08-01), Vermeiren et al.
patent: 4511837 (1985-04-01), Vermeiren et al.
Hofsass Jeffery A.
Renz Jr. Eugene E.
Rowland James L.
SKF Industrial Trading & Development Co. B.V.
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