.~ Volume of flow, speed of flow, volume rate of flow, or mass rate of flow {12}
1.24
.~.~ Tracer
DEFINITION
Classification: 73/1.24
Tracer:
(under subclass 1.16) Subject matter comprising either (a) an identification substance that can be followed through the course of a process, providing information on the pattern of events in the process or on the redistribution of parts or elements involved (i.e., a tracer substance) and a detector means wherein (1) the tracer substance is introduced into the fluid at a fixed rate and (2) the detector means is placed downstream of the fluid flow and is responsive to a concentration of a tracer substance or (b) a fixed concentration of an identification substance that can be followed through the course of a process, providing information on the pattern of events in the process or on the redistribution of parts or elements involved (i.e., a tracer substance) and a detector means wherein (1) the fixed concentration of the tracer substance is introduced into the fluid and (2) the detector means is placed downstream of the fluid flow and is responsive to the rate of introduction of the fixed concentration of the substance.
(1) Note. For the purpose of this subclass, a body or substance that moves along with the fluid flow without impeding the fluid flow is a tracer.
SEE OR SEARCH THIS CLASS, SUBCLASS:
170.04, for determining the direction of fluid flow by use of a tracer.
861.05+, for determining a fluid flow rate by measuring the time required for a tracer placed in the fluid to travel from one position to another.
SEE OR SEARCH CLASS
250, Radiant Energy, appropriate subclasses for an invisible radiation tracer for measuring fluent flow, especially
259+, for the use of tracer material in a well to test for leakage into or out of a well, subclasses 302+ for flow metering using invisible radiation type tracer methods, subclasses 306+ for rate of flow testing using charge particles, subclass 356.2 for flow metering using a radioactive tracer, and subclass 359.1 for use of invisible radio tracers for fluent material level tests.
378, X-Ray or Gamma Ray Systems or Devices,
51, for X-ray devices which may include flow metering.
