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3985030 |
Ultrasonic acoustic pulse echo ranging system
An ultrasonic acoustic pulse echo ranging system for monitoring the depth of liquid in a tank has transmitter and receiver transducers for mounting side-by-side in an upwardly directed disposition...
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3975958 |
Apparatus for level measurement of free flowing substances, solid substances or combination of these in tanks, containers, reservoir or the like
Apparatus for measuring the level of a substance in a container of substantial depth which is practical, efficient, and rugged. Sonic or acoustic waves are transmitted through relatively sonic-wave...
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3920155 |
Particle level indicator
An apparatus arranged to indicate the level of particles remaining in a housing. The housing dispenses particles therefrom, and the apparatus senses when the particle level is diminished beneath a...
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3910116 |
Transducer positioning means for fluid level monitoring
Positioning means for positioning the transmitting and receiving transducer means of a fluid level monitoring system above the fluid, such as in monitoring the liquid level in a conduit. The...
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3890840 |
Laser controlled fathometer
In a method and apparatus for underwater depth recording, a laser beam pld on a datum point impinges upon a plurality of vertically adjacent laser beam receptor cells rigidly affixed to a float. A...
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3889523 |
Leak-detection apparatus and liquid level variations detector
A highly accurate liquid level detector employing ultrasonic acoustics. It may be especially useful in indicating leaks in large-volume tanks, and particularly where such tanks have large...
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3884074 |
Sonic liquid level measuring apparatus
An elongated vibration transmitting body, extending vertically in a tank, is coupled at its top to an exciter that recurrently imparts brief periods of vibration to the body. A similar vibration...
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3874236 |
Vibration method and apparatus for measuring the level of material in a container
The method and apparatus for measuring the level of material in a container wherein a rope is stretched under constant tension between an anchor in the container and a fixed point. The level of...
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3851333 |
SPRAY INJECTION FOR TESTING AN ULTRASONIC LIQUID LEVEL DETECTOR
An ultrasonic liquid level detector consisting of opposed ultrasonic sources in a glass pipe with a spray adaptor and pump means for simulating operational conditions with adaptors for other styles...
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3834233 |
APPARATUS FOR MEASURING THE LEVEL OF THE CONTENTS OF A CONTAINER
Method and apparatus for determing the level of the contents of a container -- typically the level of oil in a bulk oil tank are disclosed. An ultrasonic transmitter and receiver arrangement is...
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3825025 |
TRANSDUCER DEVICES AND APPARATUS INCLUDING SUCH DEVICES
The invention provides a liquid sensing transducer comprising two spaced apart piezo-electric elements. An oscillator imparts ultrasonic vibrations to one element. The second element responds to...
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3745829 |
LEVEL MEASURING EQUIPMENTS
An electroacoustic liquid level measuring device useful in a cryogenic environment to yield measurements having an accuracy of a few millimeters in liquid level measurements of 20 or 30 meters is...
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3744301 |
ULTRASONIC VOID FRACTION DETECTOR
The attenuation of an ultrasonic tone burst propagated in a wire is measured to determine the void fraction of a gas-liquid mixture. When the gas-liquid mixture consists of a layer of gas over a...
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3704442 |
HEIGHT SENSOR FOR HYDROFOIL WATERCRAFT
A method for detecting the relative position of a gaseous-liquid interface with respect to a datum point and an apparatus embodying the same for use in hydrofoil height sensors. A transmitter...
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3695108 |
ADAPTIVE PROPORTIONAL CONTROL FOR DETERMINING INTERFACES OF DISTINCT MATERIALS
A process and apparatus for detecting changes in interface level between distinct materials within a container independent of any chemical or physical changes taking place within either or both of...
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3633424 |
MAGNETOSTRICTIVE ULTRASONIC TRANSDUCER
A magnetostrictive transducer in which unwanted pulses due to internal reflections are avoided by placing the energizing winding at or near one end of a magnetostrictive rod, the rod having a...
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3603149 |
ULTRASONIC LIQUID LEVEL INDICATOR
A transducer is placed on the outside of a container and used to transmit an ultrasonic pulse through the wall of the container and to detect the reflected ultrasonic pulse. The amplitude reflected...
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3585457 |
MATERIAL LEVEL SENSING DEVICE AND INDICATING SYSTEM
This invention relates to the art of level sensing devices and more particularly to a sensing device and associated circuit for providing an indication when the level of material in a chamber has...
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3540275 |
METHOD AND APPARATUS FOR MEASURING LIQUID VOLUME IN A TANK
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3407298 |
Long infrared to short infrared image converter
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3394589 |
Apparatus for measuring liquid level
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3372592 |
Single-wire mechanical wave depth gauge
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3357346 |
Device for compression of the contents of a container
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3337451 |
Ion exchange method and composition for the desalination of water
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3326042 |
Ultrasonic liquid level indicator
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3316997 |
Echo ranging apparatus
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3312107 |
Liquid storage and measuring system
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3290944 |
Remote temperature measuring apparatus
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3273146 |
Object identifying apparatus
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3266738 |
Machine for the preparation of plasticized material
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3266311 |
Cryogenic liquid level sensing apparatus
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3246516 |
Apparatus using vibratory energy to detect the presence of substances
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3241368 |
Apparatus and method for measuring the level of a liquid
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3229523 |
Apparatus employing vibratory energy
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3224250 |
Gas liquid detector
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3222964 |
Method of sheeting webs
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3222929 |
Augmented-signal mechanical wave depth gauge
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3220358 |
Railway car truck with elastic torsion blocks
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3214974 |
Remote acoustical sensor
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3213438 |
Feedback controlled sonic liquid detector
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3212338 |
Digital manometer
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3208281 |
Shortest-path mechanical wave depth gauge
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3206979 |
Apparatus for measuring material level
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3184969 |
Liquid level indication system
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3184968 |
Level indicator
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3170094 |
Liquid level indicator
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3163843 |
Liquid level indicator
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3139544 |
Magnetostrictive sensing devices
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3133442 |
Level sensor
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3115456 |
Method for initiating cycle operation
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