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G01L 1/00
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Measuring force or stress, in general |
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G01L 1/02
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Measuring force or stress, in general by hydraulic or pneumatic means |
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G01L 1/04
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Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs |
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G01L 1/06
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Measuring force or stress, in general by measuring the permanent deformation of gauges, e.g. of compressed bodies |
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G01L 1/08
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Measuring force or stress, in general by the use of counterbalancing forces |
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G01L 1/10
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Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings |
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G01L 1/12
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Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress |
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G01L 1/14
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Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators |
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G01L 1/16
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Measuring force or stress, in general using properties of piezoelectric devices |
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G01L 1/18
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Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material |
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G01L 1/20
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Measuring force or stress, in general by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress |
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G01L 1/22
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Measuring force or stress, in general by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges |
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G01L 1/24
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Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis |
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G01L 1/25
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Measuring force or stress, in general using wave or particle radiation, e.g. X-rays, neutrons |
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G01L 1/26
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Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload |
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G01L 3/00
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Measuring torque, work, mechanical power, or mechanical efficiency, in general |
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G01L 3/02
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Rotary-transmission dynamometers |
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G01L 3/04
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Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft |
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G01L 3/06
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Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving mechanical means for indicating |
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G01L 3/08
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Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving optical means for indicating |
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G01L 3/10
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Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating |
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G01L 3/12
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Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving photoelectric means |
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G01L 3/14
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Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft |
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G01L 3/16
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Rotary-absorption dynamometers, e.g. of brake type |
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G01L 3/18
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Rotary-absorption dynamometers, e.g. of brake type mechanically actuated |
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G01L 3/20
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Rotary-absorption dynamometers, e.g. of brake type fluid actuated |
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G01L 3/22
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Rotary-absorption dynamometers, e.g. of brake type electrically or magnetically actuated |
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G01L 3/24
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Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity |
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G01L 3/26
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Devices for measuring efficiency, i.e. the ratio of power output to power input |
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G01L 5/00
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes |
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G01L 5/03
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring release force of ski safety bindings |
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G01L 5/04
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands |
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G01L 5/06
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using mechanical means |
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G01L 5/08
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using fluid means |
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G01L 5/10
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means |
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G01L 5/12
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring axial thrust in a rotary shaft, e.g. of propulsion plants |
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G01L 5/13
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles |
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G01L 5/14
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the energy of projectiles |
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G01L 5/16
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force |
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G01L 5/18
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring ratios of force |
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G01L 5/20
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring wheel side-thrust |
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G01L 5/22
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers |
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G01L 5/24
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed |
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G01L 5/26
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining the characteristic of torque in relation to revolutions per unit of time |
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G01L 5/28
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes |
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G01L 5/101
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors inserted into the flexible member |
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G01L 5/102
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors located at a non-interrupted part of the flexible member |
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G01L 5/103
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors fixed at one end of the flexible member |
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G01L 5/105
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using electro-optical means |
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G01L 5/106
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means for measuring a reaction force applied on a cantilever beam |
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G01L 5/107
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means for measuring a reaction force applied on an element disposed between two supports, e.g. on a plurality of rollers or gliders |
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G01L 5/108
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means for measuring a reaction force applied on a single support, e.g. a glider |
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G01L 5/161
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance |
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G01L 5/162
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance of piezoresistors |
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G01L 5/163
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance of potentiometers |
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G01L 5/164
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in inductance |
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G01L 5/165
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in capacitance |
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G01L 5/166
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using photoelectric means |
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G01L 5/167
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using piezoelectric means |
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G01L 5/168
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using counterbalancing forces |
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G01L 5/169
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using magnetic means |
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G01L 5/171
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using fluid means |
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G01L 5/173
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using acoustic means |
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G01L 5/1623
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance of pressure sensitive conductors |
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G01L 5/1627
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Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance of strain gauges |
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G01L 7/00
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements |
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G01L 7/02
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges |
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G01L 7/04
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges in the form of flexible, deformable tubes, e.g. Bourdon gauges |
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G01L 7/06
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the bellows type |
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G01L 7/08
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type |
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G01L 7/10
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the capsule type |
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G01L 7/12
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the capsule type with exhausted chamber; Aneroid barometers |
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G01L 7/14
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the capsule type with exhausted chamber; Aneroid barometers with zero-setting means |
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G01L 7/16
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of pistons |
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G01L 7/18
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges |
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G01L 7/20
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges involving a closed chamber above the liquid level, the chamber being exhausted or housing low-pressure gas; Liquid barometers |
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G01L 7/22
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges involving floats, e.g. floating bells |
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G01L 7/24
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Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges involving balances in the form of rings partly filled with liquid |
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G01L 9/00
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means |
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G01L 9/02
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers |
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G01L 9/04
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers of resistance strain gauges |
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G01L 9/06
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers of piezo-resistive devices |
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G01L 9/08
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices |
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G01L 9/10
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in inductance |
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G01L 9/12
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance |
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G01L 9/14
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means involving the displacement of magnets, e.g. electromagnets |
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G01L 9/16
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in the magnetic properties of material resulting from the application of stress |
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G01L 9/18
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electric potential is produced or varied upon the application of stress |
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G01L 11/00
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group or |
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G01L 11/02
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group or by optical means |
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G01L 11/04
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Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group or by acoustic means |
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G01L 11/06
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Ultrasonic means |
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G01L 13/00
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Devices or apparatus for measuring differences of two or more fluid pressure values |
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G01L 13/02
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Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements |
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G01L 13/04
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Devices or apparatus for measuring differences of two or more fluid pressure values using floats or liquids as sensing elements |
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G01L 13/06
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Devices or apparatus for measuring differences of two or more fluid pressure values using electric or magnetic pressure-sensitive elements |
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G01L 15/00
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Devices or apparatus for measuring two or more fluid pressure values simultaneously |
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G01L 17/00
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Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies |
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G01L 19/00
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MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE - Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges |
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G01L 19/02
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Arrangements for preventing, or for compensating for, effects of inclination or acceleration of the measuring device; Zero-setting means |
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G01L 19/04
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Means for compensating for effects of changes of temperature |
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G01L 19/06
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Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa |
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G01L 19/08
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Means for indicating or recording, e.g. for remote indication |
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G01L 19/10
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Means for indicating or recording, e.g. for remote indication mechanical |
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G01L 19/12
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Alarms or signals |
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G01L 19/14
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Housings |
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G01L 19/16
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Dials; Mounting of dials |
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G01L 21/00
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Vacuum gauges |
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G01L 21/02
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Vacuum gauges having a compression chamber in which gas, whose pressure is to be measured, is compressed |
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G01L 21/04
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Vacuum gauges having a compression chamber in which gas, whose pressure is to be measured, is compressed wherein the chamber is closed by liquid; Vacuum gauges of the McLeod type |
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G01L 21/06
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Vacuum gauges having a compression chamber in which gas, whose pressure is to be measured, is compressed wherein the chamber is closed by liquid; Vacuum gauges of the McLeod type actuated by rotating or inverting the measuring device |
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G01L 21/08
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Vacuum gauges by measuring variations in the transmission of acoustic waves through the medium, the pressure of which is to be measured |
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G01L 21/10
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Vacuum gauges by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured |
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G01L 21/12
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Vacuum gauges by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured measuring changes in electric resistance of measuring members, e.g. of filaments; Vacuum gauges of the Pirani type |
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G01L 21/14
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Vacuum gauges by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured using thermocouples |
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G01L 21/16
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Vacuum gauges by measuring variation of frictional resistance of gases |
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G01L 21/18
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Vacuum gauges by measuring variation of frictional resistance of gases using a pendulum |
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G01L 21/20
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Vacuum gauges by measuring variation of frictional resistance of gases using members oscillating about a vertical axis |
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G01L 21/22
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Vacuum gauges by measuring variation of frictional resistance of gases using resonance effects of a vibrating body; Vacuum gauges of the Klumb type |
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G01L 21/24
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Vacuum gauges by measuring variation of frictional resistance of gases using rotating members; Vacuum gauges of the Langmuir type |
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G01L 21/26
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Vacuum gauges by making use of radiometer action, i.e. of the pressure caused by the momentum of molecules passing from a hotter to a cooler member; Vacuum gauges of the Knudsen type |
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G01L 21/28
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Vacuum gauges by making use of radiometer action, i.e. of the pressure caused by the momentum of molecules passing from a hotter to a cooler member; Vacuum gauges of the Knudsen type using torsional rotary measuring members |
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G01L 21/30
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Vacuum gauges by making use of ionisation effects |
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G01L 21/32
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Vacuum gauges by making use of ionisation effects using electric discharge tubes with thermionic cathodes |
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G01L 21/34
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Vacuum gauges by making use of ionisation effects using electric discharge tubes with cold cathodes |
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G01L 21/36
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Vacuum gauges by making use of ionisation effects using radioactive substances |
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G01L 23/00
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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 |
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G01L 23/02
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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 mechanically indicating or recording and involving loaded or return springs |
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G01L 23/04
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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 involving means subjected to known counteracting pressure |
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G01L 23/06
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Indicating or recording by optical means |
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G01L 23/08
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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 |
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G01L 23/10
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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 |
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G01L 23/12
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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 changing capacitance or inductance |
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G01L 23/14
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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 electromagnetic elements |
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G01L 23/16
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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 photoelectric means |
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G01L 23/18
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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 resistance strain gauges |
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G01L 23/20
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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 combined with planimeters or integrators |
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G01L 23/22
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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 for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines |
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G01L 23/24
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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 for measuring pressure in inlet or exhaust ducts of internal-combustion engines |
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G01L 23/26
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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 - Details or accessories |
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G01L 23/28
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Cooling means |
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G01L 23/30
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Means for indicating consecutively positions of pistons or cranks of internal-combustion engines in combination with pressure indicators |
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G01L 23/32
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Apparatus specially adapted for recording pressure changes measured by indicators |
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G01L 25/00
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Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency |
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G01L 27/00
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Testing or calibrating of apparatus for measuring fluid pressure |
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G01L 27/02
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Testing or calibrating of apparatus for measuring fluid pressure of indicators |
