Matches 1 - 18 out of 18


Match Document Document Title
5941122 Liquid level sensor incorporating a capacitive rotary position encoder  
A circuit board has an arcuate array of conductor segments each subject to a digital waveform differing in phase for the various segments, and a concentric pickup conductor. A rotary encoder disk...
5532687 Modular magnetic scour monitoring device and method for using the same  
A modular scour monitoring device which employs magnets located within a weighted descending collar is designed for placement about bridge piers, abutments and the like, such that the occurrence...
4875295 Drop-weight material level indicator  
A drop-weight material level indicator in which a spool is mounted above material whose level is to be sensed and is coupled to a motor for selectively unwinding and winding a drop line wound on...
4602491 Combination lock  
The combination lock includes several encoding buttons, a latch plate is slidably movable between two terminal positions and has a plurality of locking pins; a plurality of lock disks each have on...
4425796 Hermetically sealed tank gauge apparatus  
A hermetically sealed tank gauge apparatus which continuously monitors the fluid level in a closed crude oil tank. A sensor device measures the liquid level in the tank. The sensor device...
4341110 Percolation testing method and apparatus  
Apparatus for automatically recording the rate of fluid absorption of the soil includes three subsystems which may be easily assembled on site. During a test procedure the rate of descent of a...
4313114 Liquid level recorder apparatus and method for storing level differences in memory  
A shaft position recorder apparatus and method are described which can be used for recording changes in liquid levels. The recorder employs an electronic memory for storing the changes in liquid...
4268839 Photo-tide level recorder  
A tide level recorder records tide elevations utilizing a free floating graduated rod-staff, against a fixed index mark, simultaneous with a chronometer reading. The free floating graduated...
4112761 Liquid level measuring apparatus  
This invention relates to an apparatus for measuring and recording the changes in magnitude of a variable. The apparatus includes a recording stylus or pencil and a means for carrying a recording...
3880109 Fuel delivery detector  
An apparatus for indicating the prior minimum level of fuel in an oil fuel tank after the tank has been refilled. A float system contained within the fuel tank is mechanically connected to a...
3618122 TIDE INDICATING AND RECORDING DEVICE  
A device for indicating and/or recording the rise and fall of liquids, such as tides, comprises a backing member made of ferromagnetic material and disposed in a vertical plane with a magnetic...
3427632 LEVEL RECORDER HAVING TAPE PUNCHING MEANS  
3393559 Rain gauge  
3309710 Flood hydrograph and rain-gage recorder  
3303510 Water level direction indicator  
3162044 Magnetic data recorder  
2984107 Pitot static tube  
2947170 Pressure operated liquid level measuring device  

Matches 1 - 18 out of 18