A constant level automated liquid volume monitoring system and method for determining storage tank leak rate. Volume changes necessary to maintain storage tank liquid level, and volume changes due to temperature changes, are substantially constantly measured and calculations are made frequently and averaged periodically to provide updated leak rate indications for a system operator. By use of this system, real time statistical analysis can be achieved.

System and method for automatically monitoring liquid volume changes in storage tanks

Energy transfer system

A system for injecting chemicals into a fire fighting system of the type using a plurality of water hoses and having a source of water and a source of chemicals. A servo motor system is connected to automatically meter a certain ratio of chemicals into the water supply. The servo motor system is responsive to the total flow to control the chemical pump to pump a certain ratio of chemicals into the water supply even if the total flow varies. Various modifications are disclosed.

Chemical injection control system for fire fighting

In a fuel gas distribution system, at least one fuel gas stream is mixed with air to achieve a heating value equivalency which is the same as that of another fuel gas having a different heating value and specific gravity. The heating value equivalency is defined as the heating value of a fuel gas in heat units per unit of volume divided by the square root of the specific gravity of the gas. A control system is employed to measure the specific gravity, pressure, temperature and flow rate of the first gas in a first gas stream, and the pressure, temperature and flow rate of air in a second stream, and to control the flow rate of the gas from the first stream and air from the second stream such that the resulting mixture from the two streams has the same heating value equivalency as that of a third gas which was used to adjust the gas burners for use in that system.

Control system and apparatus for producing compatible mixtures of fuel gases

A closed loop measuring system includes a digital computer, a measurement device, actuator means associated with the measurement device, and controlled by the computer for establishing known and unknown conditions of a physical phenomena such as pressure, torque, or temperature in the measurement device, and the sensors associated with the measurement device responsive to the conditions established therein for producing relative data values which are stored in the computer memory. The computer controls the establishment of the known and unknown conditions in the measurement apparatus and the storing of the relative data values, and calculates the unknown conditions from the stored relative data values and the stored values for the known conditions. Measurement apparatus for use in such systems, includes a water manometer for measuring gas pressure, a mercury manometer for measuring gas pressure, a torque transducer for measuring torque loads, and a temperature transducer for measuring temperature.

Method and apparatus for measuring physical phenomena

Method of and apparatus for proportioning combustible fluids

This invention relates to improvements in methods of and apparatus for controlling mixing of combustible gases. In most gas mixing installations it is desirable to maintain a constant total heating value per unit volume of the mixed gas; but there are certain exceptional cases where, due to...

Method of and apparatus for controlling mixing of combustible gases

This invention relates to improvements in methods of and apparatus for controlling the mixing of combustible gases A primary object of the invention is to provide novel methods of and apparatus for controlling mixing of combustible gases for stabilization of the mixture, whereby a constant

Method of and apparatus for controlling the mixing of combustible gases

Liquid level and temperature indicating apparatus

Method of and apparatus for making combustible gas

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