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4796658 |
Apparatus for detecting basement water
Basement flooding due inter alia, to drain overflow or sump pump failure is a common problem. An apparatus for solving the problem includes a cover for closing a basement floor drain, a tubular...
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4796472 |
Level detector with multiple magnetically activated switches
The linear position transducer of the present invention comprises a pair of elongated electrically conducting members disposed within an elongated tubular container following the length thereof,...
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4786846 |
Level guage apparatus
A self-balancing type level gauge apparatus is disclosed, in which the change of a magnetic flux generated between coupling outer and inner magnet rings on the basis of a displacement between the...
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4782699 |
Pulsed fuel level indicating system
To prevent electrochemical corrosion in a conventional float operated variable resistance fuel level detector due to alcohol in the fuel a current pulse is applied to the detector unit once a...
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4779460 |
Sensor and system for measuring the level of a liquid in a container
A sensor and system for measuring the level of a liquid includes a linear potentiometer having a resistance circuit element and a mechanism for changing the resistance of the circuit element...
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4773265 |
Method for detecting leaks
A method and apparatus are disclosed for measuring changes in relative distance between a float and both a signal source and a detector. Also disclosed is the advantageous use of such an apparatus...
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4771804 |
Liquid level sensing and control assembly
A liquid level sensor and controlling assembly disposed and mounted in direct communication with a reservoir of liquid to be monitored and including a float structure connected to an elongated stem...
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4768377 |
Method and apparatus for measuring the liquid level in tanks subjected to varying accelerations
It will thus be seen that the method for measuring the level of a liquid contained in a reservoir which is subjected to varying accelerations is carried out by means of a level sensor which signals...
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4760736 |
On board indicator for motor vehicles
An on board indicator for vehicles is provided, including a sensor detecting a physical magnitude to be indicated, connected to a display device through a low pass filter whose cut off frequency is...
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4755640 |
Mechanical actuated float switch
A hollow floatable structure secured to a flexible electric cord for switching electric motor pumps or the like. The structure encloses an electric switch assembled with lever arm. The lever arm is...
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4744808 |
Liquid level sensing and control
A fluid flow chamber including a housing defining a chamber, a chamber inlet and a chamber outlet for flow of liquid therethrough, a float in the chamber, and a magnet and magnetic position sensor,...
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4744247 |
Device for electrical measurement of the level of a liquid in a fuel tank
A device for electrical measurement of the level of a fluid contained in a fuel tank of a motor vehicle is disclosed. In addition to a variable resistance float sensor in a dip tube, a travel...
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4743717 |
Apparatus for stopping electrically driven watering system
An apparatus for stopping an electrically driven watering system in response to rainfall, said apparatus having a float activating a reed switch which is mounted within a rain-catching cylinder,...
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4739658 |
Level sensing system
A monitoring unit for remotely monitoring liquid levels in a container includes a common probe, a reference probe, and four sensing probes, each mounted to the container in electrical contact with...
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4738295 |
Method and apparatus for evaporating a fluid in a rotating vacuum evaporation system
A method and apparatus of controlling a rotating vacuum evaporation system is disclosed. The rotating flask, containing the medium to be evaporated, is buoyantly supported in a liquid bath and the...
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4733560 |
Liquid sensing system
A liquid level sensing system having a sensing head with a pair of mutually insulated metal electrodes, one of the electrodes connected to the output of an amplifier and the other to the input. The...
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4730491 |
Magnetically activated multiple switch level detector
This invention discloses a linear position detector including a pair of elongated electrically conducting members disposed in a parallel arrangement and a plurality of magnetically activated...
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4726226 |
Distance and temperature measuring system for remote locations
A measurement system for remotely measuring a parameter and relative distance having a parameter sensor providing signals to control the pulse repetition rate of a pulse generator, the pulses from...
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4724705 |
Fuel gauge
An apparatus is provided for determining the quantity of fuel in a fuel tank having a contoured interior wall. The apparatus includes a buoyant member for floating on the top surface of fuel in the...
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4706707 |
Fuel inlet assembly
A combination fuel delivery, pick-up and fuel level sensor of the type including conduits at least one of which is formed in a helix configuration so as to locate and bias the inlet closely...
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4699003 |
Fuel meter for vehicles
A float-type fuel meter for vehicles. The float regulates in a known manner the position of a movable contact to a resistor. According to the invention, the resistance is a potentiometric resistor,...
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4688587 |
Liquid tank and process for operating it
The liquid tank comprises a container (1) containing a level gauge (3), an element (9) indicating the position of the gauge (3) and located outside the container (1), and a filling duct (2) for the...
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4671121 |
Liquid level indicating device
A liquid level indicating device for a fuel tank adaptable for use in any size fuel tank comprising a mounting plate, a support arm depending therefrom, a float arm, a float, a linear wire-wound...
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4638663 |
Level indicating device for liquid containers
A level indicating device for liquid filled containers is provided having a floating sensing element which is operatively connected with a signal device, the sensing element having several,...
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4637254 |
Gauge apparatus for measuring liquid levels
This invention pertains to gauge apparatus for measuring liquid levels comprising an elongated electrical sensor adapted to be arranged in upright position while immersed so constructed as to have...
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4635043 |
Level indication
A level indication has a ratio-measurement mechanism whose measurement coil can be connected to a source of current (6) via a switch element (12). This switch element (12) is controlled by the...
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4631375 |
Delayed action liquid level sensing apparatus
An improved low liquid level float control apparatus particularly adapted for use in vessels or tanks containing a fluid of the type utilized in liquid vending machines is disclosed. An electronic...
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4627283 |
Fuel level detector for automobile fuel tank
A fuel level detector for an automobile fuel tank comprises a strut vertically provided within a fuel tank, a float slidably fitted around the strut and having a permanent magnet therein, a...
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4628162 |
Fluid level indicator for a reservoir
The present invention is related to an electric switch comprising a magnet and a reed contact which is actuatable by the magnetic force of the magnet. The reed contact is shielded relative to the...
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4625284 |
Fuel gauge for vehicles
A fuel gauge for vehicles includes a memory circuit for storing a value for residual quantity of fuel contained in a fuel tank when an ignition switch is turned off and a display unit for...
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4617806 |
Liquid level control apparatus
A liquid level control apparatus which detects a liquid level in a tank employed, for example, in ice making equipment, to thereby trigger a control operation. The level control apparatus comprises...
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4614114 |
Measuring device
A measuring device comprises not only a fluctuation-suppressing means between the input and output circuits for absorbing sudden variations in input signal but also a selection control means which...
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4612949 |
Apparatus for controlling water level
Apparatus for monitoring and controlling the level of fluid in a reservoir. The apparatus utilizes a fluid sensing probe to monitor the level of fluid in a reservoir and can generally be installed...
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4605038 |
Float valve control
A liquid level control device for monitoring the level of water in a steam generating tank between predetermined upper, intermediate, and lower levels, with the tank equipped with a valve for...
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4589282 |
Fine resolution liquid level detector
A large number of equally spaced Hall-sensors form a column. They are mounted in a tube with a closed bottom. Each sensor is a packaged integrated circuit with a Hall-cell connected to a Schmitt...
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4580450 |
Valve with a level gauge for a liquefied carbon dioxide container
The invention relates to a valve with a level gauge for a elongated liquidfied carbon dioxide container, comprising a body, and a level gauge having at least one articulating or flexible part...
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4571998 |
In-ground tank measuring system
An in-ground tank measuring system for monitoring the level of fuel in a plurality of tanks. A float is provided in each tank connected by cable to a biased take-up reel connected to a...
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4567762 |
Thermoelectric level detector and a method for its manufacture
A thermoelectric level detector employs an impedance element, at least a portion of which is meandering in configuration in which the resistive path repeatedly traverses the axis thereof, to detect...
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4562734 |
System for measuring quantity of liquid contained in tank
There are provided at least two liquid level detectors in a liquid tank, such as an automobile fuel tank. The detectors are connected so as to obtain the sum of the output signals of the detectors....
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4560986 |
Comparative variable resistance position indicator
This invention relates to a position indicator wherein the information on the location of a position-sensing target is obtained by measuring and comparing the ohmic resistances of two electric...
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4557144 |
Electric level sensor for motor vehicle fuel tanks
An electric level sensor for motor vehicle fuel tanks comprises a potentiometer for continuously monitoring the level, which is constituted by an arcuate resistive track deposited on a ceramic...
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4539547 |
Low liquid level sensing and warning circuit
A circuit for sampling the conditions of a liquid level sensor for a short period of time after the circuit is turned on and energizing a warning indicator for an initial check-out period that is...
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4537070 |
Magnetically responsive circuit-element module for liquid-level monitoring and probe therefrom
Components of a π-network of resistors and magnetically responsive reed switches are encapsulated to form modules with keyed ends for end-to-end interlocking assembly. Conductive tabs of one...
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4532491 |
Liquid-level transmitter with bell jar housing for gasoline tanks
In a liquid-level transmitter having a swingable support lever (3) which bears a float (7) and a variable electrical resistor (9) actuated thereby, the variable resistor (9) is surrounded by a...
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4513617 |
Storage tank gauging measuring apparatus
A display apparatus which will numerically indicate the quantity of fluids removed from any tank or tanks by accepting the output from a unit inserted in each tank which varies in resistance from...
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4513616 |
Apparatus for monitoring the level of liquid by resistive wire
A hot-wire level detecting apparatus includes a micro-processor which registers a look-up table of digital level values associated with digital values of a differential parameter representing the...
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4509044 |
Device which accurately displays changes in a quantity to be measured
Sampling data output in the form of digital signals corresponding to changes in a quantity to be measured within a predetermined period or an average value of the sampling data is compared with...
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4505148 |
Leak detection system
Leakage from a gasoline storage tank or other receptacle is detected by differentiating the output from a liquid-level monitoring transmitter with stepped voltage output and applying the...
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4497205 |
Method and apparatus for automatically sensing the level of a liquid in a reservoir
A liquid level sensor adapted to be installed inside a reservoir of a liquid to be monitored. The level sensor includes a float made from magnetic material which moves between two opposed end...
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4483192 |
Water level indicator for nuclear reactor vessel
A water level indicator for a pressure vessel is provided which employs a plurality of vertically spaced cantilevered mounted spring members. The free end of each spring member is connected to a...
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