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4637257 |
Pressure difference measuring device with a semiconductor pressure sensor
A pressure difference measuring device having a semiconductor pressure sensor in a pressure pickup body which supports at each end face thereof a separating diaphragm with an adjacent supplemental...
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4586383 |
Electronic pressure gauge and flow meter
A pressure gauge includes a cylindrical member having a flexible plate covering one end. Center flex of the plate is used to measure the force applied by fluid pressure. A low pressure transducer...
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4559829 |
Differential pressure transmitter for industrial process fluids, provided with compensation of static pressure change effects
A differential pressure transmitter for process fluids is of the kind having a measuring transducer with a closed cell containing a filling liquid and a measuring diaphragm on both sides of which...
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4543831 |
Optical pressure transducer
Optical pressure transducers are used in devices for the measurement of the pressure of explosive gasses and liquids. In order to increase the sensitivity of the optical pressure transducer, the...
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4532810 |
Device for the pick-up of measured values
A device for the pick-up of measured values having a frame forming a first measurement reference and an element movable relatively to the frame and forming a second measurement reference. The...
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4531414 |
Linear displacement transducer device
A transducer device for translating increments of linear displacement by means of opto-electronic sensing into increments of units expressed into units of volts. The device comprises an...
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4476725 |
Differential pressure gauge
A differential pressure gauge comprises a balance beam (3) acting upon a vibrating blade (6). The beam (3) and the blade (6) are disposed in a rigid chamber 4 under vacuum. The beam (3) is acted...
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4440027 |
Velocity and mass air flow sensor
A mass air flow sensor (10) has a vortex generator (12) positioned in the air flow for generating two streams of vortices. Spaced vortex detectors (20), (22) are each positioned the same distance...
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4409443 |
Pressure responsive electrical switching apparatus
An improved construction is provided for fluid pressure responsive electrical switching apparatus, which achieves physical miniaturization, quick response time, sensitivity to relatively low levels...
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4393713 |
Digital pressure-measuring device
The pressure-measuring device comprises a first chamber subjected to the pressure to be measured and a second chamber connected to the first through an opening fitted with a valve. The device...
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4378809 |
Audio-telemetric pressure sensing systems and methods
A differential pressure sensing device is fully implanted beneath the skin in the living body such that its pressure responsive means, such as a diaphragm means, senses the difference in pressure...
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4356055 |
Process and device for monitoring the plasma etching of thin layer utilizing pressure changes in the plasma
A process and device for plasma etching a thin layer. The process includes the steps of identifying a plateau in gas pressure that occurs slightly before the end of etching and then detecting a...
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4343180 |
Apparatus for furnishing a signal indicative of the load of an internal combustion engine
The interior of a differential pressure cell is exposed to the pressure in the intake pipe of an internal combustion engine. An absolute pressure cell is exposed to the ambient air pressure. The...
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4302973 |
Altitude difference measuring apparatus
An altitude difference measuring apparatus for measuring the difference between the altitudes at a first and second points on the basis of the barometric difference between the points, having an...
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4271701 |
Gas flow measuring system
The pressure difference across a pneumotach restriction is sampled with a gas chopper connected across a pressure difference detecting transducer. The gas chopper alternates the pressures backward...
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4262532 |
Pressure and temperature sensor
A hybrid sensor for simultaneously sensing pressure and temperature in non-interacting manner, includes an insulative substrate having a temperature-sensitive printed thick film resistor fabricated...
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4244226 |
Distance measuring apparatus and a differential pressure transmitter utilizing the same
A distance measuring apparatus and a differential pressure transmitter utilizing the same having an ultrasonic element reflector mounted between a pair of ultrasonic transducers. The alternate...
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4206762 |
Telemetric differential pressure sensing method
A differential pressure sensing device is fully implanted in the body of a patient to monitor internal pressure such as intracranial pressure. A movable element in the sensor communicates with the...
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4199838 |
Indicating device for vacuum cleaners
An indicating device for a vacuum cleaner having means which operates as a result of the pressure difference between the inside of a filter dust container and the outside thereof and is provided...
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4198867 |
Temperature compensating means for pressure measuring apparatus
A differential-pressure measuring instrument comprising a main body assembly with a pair of diaphragms each subject to a respective fluid pressure. The diaphragms enclose a sealed chamber...
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4165652 |
Vibratable-wire instrument having an improved temperature compensating technique
A differential-pressure measuring instrument includes a pair of diaphragms each subject to a respective fluid pressure. The diaphragms enclose a sealed chamber containing a fill-liquid surrounding...
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4158310 |
Optical pressure transducer of randomly distributed fiber optics
An optical pressure transducer utilizing a deformable diaphragm having a reflective surface in which a fiber optic bundle having at least 100 optical fibers is randomly divided at one end into two...
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4135407 |
Method and apparatus for overrange protection of the transducer in a differential pressure transmitter
A method and apparatus for protecting the transducer in a liquid-filled differential pressure transmitter having stroke limited, isolation diaphragms from exposure to overrange pressure are...
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4091682 |
Digital differential pressure measurement apparatus
Apparatus for measuring a pressure differential in a fluid carrying conduit characterized by a digital representation of the rate of fluid flow and a high degree of accuracy is disclosed. The...
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4086814 |
Pressure sensing system
Apparatus for displaying pressure in digital form including a plurality of pressure-sensitive transducers arranged in a vertical linear array within a liquid container, from a most sensitive...
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4067241 |
Improvements in or relating to oscillating crystal transducer systems
A fluid pressure transducer comprises a chamber; one or more matched, plate-like crystals within the chamber; electrical means for exciting each of the crystals and means for transmitting forces...
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4049935 |
Pressure switch with diaphragm
A pressure switch for use within a pressure chamber containing a gas having a pressure of P 2 , said switch including a pressure vessel containing gas having a pressure of P 1 , said vessel...
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3989911 |
Magnetic differential pressure switch
A differential pressure switch incorporating a differential pressure sensor formed by a body having shaped chambers therein and an elastic diaphram moving a shaft mounting a magnet and coupled...
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3853117 |
PRESSURE SENSING SYSTEM AND METHOD
A pressure sensing system for measuring fluid pressure of a living body employs a resonant sonic transponder implanted inside the living body. The resonant frequency of the transponder is a...
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3657926 |
METHOD AND APPARATUS FOR MEASURING PHYSICAL PHENOMENA
A closed loop measuring system includes a digital computer, a measurement device, actuator means associated with the measurement device, and controlled by the computer for establishing known and...
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3646814 |
PRESSURE DETECTOR
An electrochemical pressure transducer having a pressure-responsive, compnt diaphragm on either face of a cylindrical body. Pressure on either diaphragm produces movement of electrolyte fluid...
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3537798 |
DIGITAL PRESSURE TRANSDUCER
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3527241 |
FLUID PRESSURE CONTROL SYSTEMS
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3502892 |
PRESSURE-SENSITIVE OPTICAL SWITCH
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3397580 |
Pressure ratio transducer
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3374671 |
Vertical rate sensor
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3317760 |
Electrolyte-reservoir coupler
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3274833 |
Differential pressure transmitters
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3208264 |
Calibratable pressure responsive actuator
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3196686 |
Devices for transmitting signals
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3194076 |
Pressure detecting instrument
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3177726 |
Condition measuring systems
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3150525 |
Pressure indicating device
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3116635 |
Full wave pressure detector
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3084551 |
Transducer with linearized readout
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3037388 |
Condition responsive devices
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2926524 |
Method and mechanism for detecting stall and surge of gas engines
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3625062 |
Title is not available
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