G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 11/04 (2006.01)
Patent
CA 2107956
ABSTRACT OF THE DISCLOSURE A viscometer is described for measuring a single sample successively at a plurality of temperatures. At least two tubular bodies are vertically spaced, such that a single sample of liquid flows by force of gravity between the tubular bodies. Each of the tubular bodies has a first end, a second end, and a flow channel extending between the first end and the second end. A heating coil is provided for heating liquid passing through the flow channel. A temperature sensor is provided for sensing a temperature of liquid passing through the flow channel. Two meniscus sensors are provided. A time sequence initiating meniscus sensor senses the passage of a meniscus of liquid within the flow channel. A time sequence terminating meniscus sensor is spaced a known axial distance along the flow channel from the first meniscus sensor, and senses the passage of the meniscus of liquid within the flow channel. The heating coils of the two tubular bodies are set for different temperatures. A back pressure relief vent is provided between the tubular bodies thereby preventing back pressure from adversely affecting the flow of liquid by force of gravity between the tubular bodies. A computer controller is connected to the meniscus sensors of each of the tubular bodies and a timer. As liquid flows successively through the tubular bodies the computer activates the timer when a first signal is received from the time initiating meniscus sensor indicating the passage of a meniscus of liquid. The computer stops the timer when a second signal is received from the time terminating meniscus sensor indicating the passage of the meniscus of liquid. The computer performs calculations of viscosity based upon the timed duration of flow over the known distance between the first signal and the second signal. The computer receives signals and performs calculations successively as the single sample of liquid successively passes through the tubular bodies.
Fluid Life Corporation (the)
Industra-Lube Testing Laboratories Inc.
Thompson Douglas B.
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