Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Lubricant testing
Patent
1979-09-12
1981-08-04
Goldberg, Gerald
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Lubricant testing
73 19, 73 52, G01N 714
Patent
active
042815363
ABSTRACT:
The test apparatus detects pressure changes in a vessel containing a volume of a contaminated industrial liquid and a volume of gas. The apparatus includes a detector having a housing defining a chamber. A pressure transducer having a flexible, pressure-transmitting wall is mounted in the chamber. A passageway fluidly communicates between a port in the housing and the transducer. In one embodiment a needle housing is removably coupled to the port. A hollow needle is adapted to pierce a stopper in the vessel. The vessel remains continuously sealed during and after the pressure test. Pressure changes in the gas of the vessel are transmitted through the needle and the passageway to the transducer. The transducer converts such pressure changes into corresponding electric signals which are indicative of the density of organisms in the liquid contained in the vessel. In another embodiment, the gas in the vessel is coupled to a pressure-responsive, threshold switch for detecting when the gas in the vessel reaches a threshold pressure.
REFERENCES:
patent: 2603086 (1952-07-01), Ingham, Jr. et al.
patent: 2648977 (1953-08-01), Mills
patent: 2749744 (1956-06-01), Doudera, Jr. et al.
Kraft Thomas L.
Meador James W.
Vick Howard A.
Breston Michael P.
Goldberg Gerald
KVM Engineering, Inc.
Roskos Joseph W.
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