by pressure-sensitive members of the piezoelectric type

Full Title

Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid > operated electrically > by pressure-sensitive members of the piezoelectric type

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE