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7451645 Test mass for gravimeters and gradiometers  
The present invention provides devices and methods for reducing or eliminating sources of systematic errors in the measurement of absolute gravity or gravity field gradients; specifically, an...
6928869 Stick for measuring the level of a molten metal bath  
A measurement rod for measuring the level of a liquid bath is cooled but is provided with a solid end piece so that the bath cannot solidify in front of the orifice of the measurement gas injected...
6883246 Freeboard measuring device  
A freeboard-measuring device has a central housing with streamlined fins extending along sides and bottom of the housing to prevent uplifting of the housing when lowered into water and minimize...
5988873 Portable bathymetric probe simulator  
The invention relates to a portable simulator for bathymetric probes of the thermometric or calorimetric types connected at the output to an acquisition card. The simulator has at least four...
RE36401 Tandem rotor turbine meter and field calibration module  
Methods and an apparatus for measuring gas flow with greater reliability than earlier single-rotor and double-rotor turbine meters and dual turbine meter systems are disclosed. The apparatus...
5834641 Depth gauge  
The invention relates to a depth gauge for use in angling or sports fishery. The depth of a body of water may be measured therewith from its surface to its bottom, and/or the depth and the size of...
5791187 Level measurement method using measurements of water column pressure therefor  
For the apparatus and method to measure the water depth and level using a gas bubble type level meter, the measurement pipe for water column pressure is composed of plastic pipes of inside...
5555518 Depth sensing expendable oceanographic probes  
An expendable oceanographic probe includes a body having a weighted nose section and an after body having a tail for stabilization. A spool of wire is paid out through the tail of the after body...
5319964 Apparatus, method and system for monitoring fluid  
Fluid level in a container is determined using a single pressure transducer connected to a portable body. The body contains a computer having a memory in which fluid level-to-fluid volume...
5313712 Scuba diving instrument console having swivelling compass assembly  
An instrument console for use in scuba diving includes a console body having a first end adapted for connection to a pressurized air line, and a second end opposite the first end, at least one...
5303587 Diver's depth gauge  
The present invention comprises an oil-filled depth gauge which is made far less sensitive to violent shock and the potential resulting inaccuracies to the maximum depth gauge indicator from such...
5277054 Apparatus for in-situ calibration of instruments that measure fluid depth  
The present invention provides a method and apparatus for in-situ calibration of distance measuring equipment. The method comprises obtaining a first distance measurement in a first location, then...
5191790 Carrier  
An assembly capable of being launched from a submarine to carry into seawater an element responsive to a property of the water to be measured, comprising a carrier member coupled to the element, a...
5191719 Depth gauge for a fishing line  
A depth gauge for a fishing line of the manometric type, having a transparent tube plugged at one end and a valve means closing the other end, allowing a measurable amount of water into the tube...
5049864 Display scheme for decompression data  
Novel display scheme for decompression data is herein presented which can be animated by various types of decompression computers and permits the use of new, highly advantageous procedures in many...
5046359 Underwater launched carrier  
An assembly capable of being launched from a submarine to carry into seawater an element responsive to a property of the water to be measured, comprising a carrier member coupled to the element, a...
4953986 Air/sea temperature probe  
An air/sea temperature probe is disclosed which can be deployed from a moving ship to detect the temperature profile of the atmosphere and ocean beyond the thermal influence of a ship. The probe...
4887361 Streamlined freeboard measuring device  
The invention relates to a freeboard measuring device which comprises an elongated housing having a rectangular cross-section form, a central part of the device body. A pair of fins fixedly...
4854728 Seawater probe  
A seawater probe for measuring a physical parameter which includes a sensor element having an electrical characteristic dependent on the parameter and a detector circuit for deriving a measurement...
D302393 Diving meter  
4835716 Compact measuring apparatus capable of measuring two different data with a single pressure sensor  
Only one pressure sensor is employed in a compact measuring apparatus for measuring both depths of water and altitude. A pressure-data generator generates pressure data corresponding to a pressure...
4809550 Digital diving meter  
The disclosure in the specification sets forth a digital diving meter providing information on an axis to be readily observed in reading the information along the axial line of the display. The...
H000240 Variable length and sensor spacing thermistor array  
An adaptable thermistor array of variable length and sensor spacing. A pllity of thermistor modules are attached at any desired interval to a braided line. Each thermistor module contains its own...
4589283 Ascent gauge for divers  
A gauge for warning a scuba diver of an unsafe rate of ascent in the ocean or sea. The gauge is normally attached to the diver's forearm or wrist by means of straps. As the diver ascends, water...
4557608 Thermal microstructure measurement system  
A thermal microstructure measurement system (TMMS) operates autonomously h its own internal power supply and telemeters data to a platform. A thermal array is mounted on a cross-braced frame...
4528846 Measuring devices for watercraft  
Measuring devices for small, high performance sailboats, sailboards and other watercraft comprise a transducer to convert pressure exerted by the water through which the watercraft passes into a...
4520668 Manometric instrument for underwater diving  
A manometric instrument for use with air bottles of an underwater respirator for underwater diving, comprises a sealed casing having a transparent closure cover; a first fixed scale fixed within...
4494407 Depthometer for underwater diving  
A depthometer useful for underwater diving is constructed with a cup-shaped casing, and a rotatable transparent cover that is sealably snap-mounted to the casing and closes the front of the...
4491015 Combined instrument system for divers  
A combined instrument system for divers, in which a first instrument is connectable to a user by flexible attachment means and is snap engaged to a link which can be connected removably to at...
4466285 Underwater instrument for the combined reading of immersion time and depth, and decompression time  
An underwater instrument for the combined reading of immersion time and depth, and decompression time, wherein a depthometer, a clock device and decompression tables are mounted in mutually...
4466283 Divers console with knife and sheath  
A diver's combined gauge console having an integral mount for a knife and sheath. The gauges may include a tank pressure gauge and a depth gauge. The gauges may be slightly tilted toward one...
4352168 Diver's bottom timer/depth gauge or the like and direct digital input and tracking system therefor  
A meter for divers which records and displays depth and elapsed time of dive information in LCD format including a microprocessor for recording and displaying essential dive information, a sensor,...
4350042 Time-depth integrator  
A time-depth integrator for divers to indicate when a diver is approaching or has reached the maximum safe time limit for a dive without requiring decompression procedures when surfacing includes...
4327584 Decompression gauge  
A decompression meter includes a scale having a first section corresponding to conditions in which it is unnecessary for an ascending diver to carry out decompression halts, and a second section...
4285237 Device for accurate subaqueous measurements  
The invention relates to a device for accurate subaqueous measurements of the vertical displacements of a reference point e.g. the head of a pile by using a pressure difference recorder at the...
4265124 Remote acoustic wave sensors  
Disclosed is an acoustic wave sensor, including an acoustic wave oscillator having a resonant frequency which is modulated according to changes in a physical variable and a broadcast amplifier for...
4215571 Expendable bathythermograph for use under ice  
A temperature probe for use by submersibles when under ice, whereby impinent of the Bathythermograph against the under surface of the ice causes the probe to be released and fall to the bottom....
4196623 Depth gauges  
A depth gauge, of the type having a dial with a graduated scale over which an indicator needle is movable by a manometer unit housed in a capsule filled with liquid which communicates ambient...
4196690 Device for indicating the maximum reading of a measuring instrument  
A device for indicating the maximum reading of a measuring instrument of the type having a needle turnable over a dial marked with a graduated scale extending for more than 360° includes an...
4107995 Recorder for decompression data  
In underwater diving a record is made on an electronic recorder of the instantaneous pressure to which the diver is subjected at successive time intervals to give complete time-versus-pressure...
4107996 Pressure gauge  
A gauge for measuring pressure is described having a casing, a transparent lens, a faceplate bearing indicia and indices, a primary depth pointer, a maximum depth pointer, and a rack-and-pinion...
4098110 Depth gauge  
A capillary depth gauge employs a transparent cover member having an annular magnifying lens portion overlying the capillary passageway to facilitate reading of the gauge.
4091676 Water sample collecting device  
A water sample collecting device for obtaining a sample of water at a predetermined depth consisting of a tubular member with spherical valves at both ends and means for maintaining the valves in...
4077257 Depth Gauge  
A depth gauge from which lesser depths can be read off accurately on a scale which is expanded in the lower range. The expanded scale is achieved in that the component exposed to the pressure of...
4056010 Instrument for indicating the depths and durations of decompression stops required during underwater submersions  
An instrument for indicating the depths and durations of the decompression stops required to be made by a diver during an ascent from an underwater dive is disclosed. The instrument comprises a...
4052899 Depthometer for underwater immersion  
A depthometer having an outer waterproof casing provided with a transparent wall through which a graduated dial is visible, an indicator element movable along said dial, and an actuating element...
4050314 Pressure gauge  
A pressure gauge having a cup-shaped case closed by a transparent cover, through which a graduated scale and a pointer movable therealong are visible, the cover being mounted rotatably on the case...
4037477 Water sampler device  
A water sampler device having a cylindrical container open at each end with a ball valve mounted at the openings adapted to rotate about their axis from an initially closed position when the...
3990306 Temperature compensated depth gauge for scuba diving  
A scuba diving oil filled depth gauge has a rigid or semi-rigid case that houses operative depth gauge elements. Outside pressure is communicated to the inside oil through a rolling diaphragm made...
3919888 Gauge  
A gauge, especially for indicating the remaining diving time available to a diver at a given moment based upon his gas supply and his diving depth at that moment. Two measuring elements, e.g....

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