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3727182 |
DUAL SENSOR, ELECTRONIC MONITORING AND SIGNAL WARNING CIRCUIT FOR SPLIT MASTER BRAKE CYLINDER
A dual sensor monitoring and signal warning circuit apparatus for monitoring and indicating a low brake fluid level condition in either reservoir of a split master brake cylinder. A pair of...
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3706980 |
RF SYSTEM FOR MEASURING THE LEVEL OF MATERIALS
In an RF system which measures the level of materials, the probe includes a measuring electrode and a guard shield. The guard shield is interposed between the electrode and a conductive member,...
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3696362 |
LOW ELECTROLYTE LEVEL ALARM DEVICES
Two electrodes immersed in an electrolyte solution shunt the gate of a "Triac" solid state switching device connected in parallel with a current-limiting resistor which is connected via an alarm...
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3694804 |
COOLANT LEVEL DETECTOR FOR ENGINE COOLING SYSTEM
In a liquid level detector for an engine cooling system an oscillator is arranged to apply a continuous output signal to a probe located in a liquid coolant reservoir presenting to the oscillator a...
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3689883 |
LIQUID LEVEL DETECTOR
A liquid level detection circuit for use in a road vehicle has an oscillator which functions with a plurality of separate liquid containers, each incorporating a probe immersed in the liquid, the...
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3670319 |
ELECTRICAL ALARM DEVICE FOR OIL FILTERS RESPONSIVE TO WATER SEDIMENT LEVEL
An alarm device for oil filters responsive to the water sediment level in the filter includes a pair of electrodes which are short-circuited when the sediment reaches a predetermined level....
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3668630 |
LOW LIQUID LEVEL INDICATOR
A low liquid level indicator particularly adapted for use in an automotive vehicle which employs the alternating current voltage that appears across the primary winding of the ignition system of...
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3653017 |
LIQUID LEVEL INDICATOR SYSTEMS
A liquid level indicator system for indicating the level of a conductive liquid in a reservoir includes a probe, at least a portion of the probe which is immersed in the liquid when the liquid...
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3646541 |
FLUID LEVEL INDICATOR
A fluid level indicator utilizing a transistorized relaxation oscillator, which is powered by a DC source, and a probe, which is positioned in a container so as to detect the absence of fluid at...
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3644885 |
LOW LIQUID LEVEL INDICATOR
A low liquid level indicator particularly adapted for use in an automotive vehicle which includes a probe adapted to complete an electrical circuit to the container of the liquid when the liquid is...
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3641543 |
LOW-LEVEL DETECTOR AND DROP RATE MONITOR, PARTICULARLY FOR INTRAVENOUS FEEDING APPARATUS
In a low-level detector, a capacitance is established between an active electrode and grounded electrode as a function of a solution level in a container. A detector, which is periodically clamped...
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3636509 |
VEHICLE LOW COOLANT LEVEL INDICATING DEVICE
A device for indicating low coolant level in a vehicle radiator when the engine of the vehicle is started, for giving a continuous indication of such condition and for automatically indicating the...
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3631437 |
INTRAVENOUS FEEDING MONITORING SYSTEM
A drop rate generator is connected to conductors imbedded in the drop chamber of an intravenous feeding system to generate a series of electrical pulses of frequency corresponding to drop rate....
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3626400 |
SELF-CHECKING FLUID LEVEL INDICATORS
A fluid level detector comprising a probe circuit for the detection of fluid at a fluid level of interest, an indicator circuit for indicating the detection of fluid at the fluid level of interest,...
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3624628 |
BATTERY-FILLING APPARATUS WITH ELECTRONIC SIGNALING UNIT
A battery-filling apparatus is provided having a wholly self-contained signaling unit connected to the handle of the filler nozzle. The signaling unit comprises a signal light, and a miniature...
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3609733 |
APPARATUS FOR CONTROLLING THICKNESS OF CAST ANODE COPPER AND THE LIKE
A vertically movable gauge, aboard a lift and carrying sensing means at its lower end, is adapted to be lowered in latched conjunction with the lift from an elevated clearance position above a mold...
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3593270 |
LIQUID LEVEL SENSING AND INDICATING SYSTEM
A system for preventing overheating of liquid cooled internal combustion engines comprising an improved radiator probe which cannot short out to produce a malfunction, an electronic warning circuit...
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3582930 |
DEVICE FOR INDICATING THE PRESENCE OF CONDUCTIVE FLUIDS
An electrical device for sensing the presence of fluids includes a pair of spaced electrodes connected in a series electrical circuit with an indicator and a source of electrical energy. Contact of...
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3580158 |
LIQUID LEVEL SENSING DEVICE
Liquid level sensing apparatus is disclosed for use with liquid developing apparatus including a reservoir of conductive developer fluid. A current flow is maintained between the conductive fluid...
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3550080 |
LOW LEVEL LIQUID INDICATOR
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3550105 |
BATTERY CONDITION INDICATOR
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3540027 |
LIQUID LEVEL CONTROL AND INDICATING APPARATUS
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3525090 |
ELECTRONIC MONITORING AND CONTROL APPARATUS
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3510836 |
FLUID LEVEL DETECTOR FOR VEHICLE BRAKE SYSTEMS AND THE LIKE
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3504205 |
LIQUID LEVEL SENSING APPARATUS
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3500342 |
ELECTROLYTIC CELL COUNTER
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3498131 |
LIQUID LEVEL MEASURING OR INDICATING DEVICE
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3495214 |
VEHICLE AND EQUIPMENT LIQUID LEVEL INDICATOR
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3477460 |
FLUID LEVEL CONTROL SYSTEM
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3474337 |
SYSTEM FOR SENSING LEVELS AND ELECTRICAL CHARACTERISTICS OF FLUENT MATERIALS
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3445834 |
LIQUID MONITORING APPARATUS
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3443438 |
FLUID INDICATING APPARATUS
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3422415 |
PROXIMITY DETECTING APPARATUS
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3416131 |
Transistorized electrolyte level indicator
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3399399 |
High water alarm for drainage sump
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3397715 |
Electronic level control
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3392581 |
Liquid level sensing and control device
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3375716 |
Fluid quantity measuring device
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3366943 |
Current interruption detection means
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3343152 |
Battery level indicator
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3341836 |
Liquid level detector
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3340892 |
Electronic detection and control system
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3339578 |
Level sensing means for electrically conductive materials
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3337778 |
Relay apparatus
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3335334 |
Liquid level sensing device
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3333258 |
Foolproof systems for sensing both normal and abnormal conditions
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3328789 |
Tank level indicator
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3314060 |
Fluid level indicator
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3312936 |
Electrical fluid level indicating system
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3300690 |
Material level detection device
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