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4733962 |
Jet velocity measuring apparatus
A jet velocity measuring apparatus is disclosed for measuring the velocity of a fluid stream. The apparatus (10) measures the time delay between primary electronic signals generated by a first...
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4728801 |
Light scattering smoke detector having conical and concave surfaces
Light-scatter smoke detector, depending from the ceiling of a room, has a base unit with a battery to power an infra-red light source and infra-red light sensor, both of which are located in an...
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4725148 |
Turbidimeter employing a semiconductor laser diode and a photodiode
In a turbidimeter for measuring a turbidity of a test solution to be measured i.e. culture solution in a fermentation apparatus, a semiconductor laser diode and a semiconductor photodiode are...
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4720636 |
Drop detecting system which operates under different ambient light conditions
A drop detecting system has light emitting diodes and phototransistors located on either side of a translucent drip chamber. The phototransistors respond to either the shadow or the reflection from...
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4719359 |
Sensing probe for sludge detectors
A sensing head for sludge detectors for use in effecting accurate sludge level detection in settling tanks, clarifiers, digesters, and the like, wherein the head that serves as the device probe...
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4710643 |
Method and apparatus for determining the degree of purity of a liquid
Method and apparatus for monitoring the purity of a liquid in a container by passing a laser beam divided into two portions with the first portion passing through a pair of quartz windows with the...
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4707133 |
Apparatus for plasma diagnostics
A system for measuring the density of certain ions or neutrals within a plasma without probe intervention. When cylindrical symmetry is present, the system also provides measurement of spatial...
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4704540 |
Photoelectric shock wave detection system for vacuum protection
A shock wave detection system used in a vacuum protection system constructed so that a high-speed shutter provided in a vacuum pipe connecting a vacuum system with an experimental apparatus is...
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4701625 |
Separation type detector with addressed selection
A separation type detector includes at least one pair of transmission and reception units connected through a transmission line, detects environmental abnormality according to changes in pulse...
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4695734 |
Photoelectric smoke sensor including a photosensing data correction ratio correction circuit
A light emitting unit and a photo sensing unit are separately arranged to face with each other, and a pulse light is emitted from the light emitting unit at every constant period, and the photo...
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4692630 |
Wavelength specific detection system for measuring the partial pressure of a gas excited by an electron beam
An optical partial pressure gas analyzer employs an electron beam to excite the outer electrons of gas atoms or molecules, and one or more photomultiplier tubes or other similar detectors to detect...
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4680576 |
Photoelectric smoke detector and alarm system
An improved photoelectric smoke detector and alarm system which may be incorporated in a single station, completely self-contained unitary structure, or which may be incorporated in a multi-station...
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4676638 |
Light-transmissible foreign object sensor
A sensor for detecting a light-transmissible foreign object, such as a raindrop, attached on a transparent body, such as a windowglass of a vehicle includes a light source, a light receiving unit...
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4675661 |
Light-attenuation type fire detector assembly
A light-attenuation type fire detector assembly of the present invention comprises a light emission drive section including a light emitter for radiating light having an intensity corresponding to...
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4673820 |
Drop detecting system with focusing mirror element and vibrator
An arrangement for improving the detection of drops in a drip chamber has a mirror element configured to focus light from a source to a detector in such a manner that a falling drop occludes a...
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4673289 |
Optical device with a high collection efficiency and cytofluorimeter making use of the same
Optical device with a high collection efficiency and cytofluorimeter using the same. This device permits the light excitation of a flow of material directed along an axis and able to emit light...
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4671102 |
Method and apparatus for determining distribution of fluids
Method and apparatus are provided to determine the distribution of fluids in a sample employing a centrifuge. The apparatus is an automated centrifuge which may employ a plurality of X-ray energies...
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4671664 |
Photometer for measuring hot gases
A photometer includes a radiation source, a measuring chamber and a receiver, all arranged in a casing and through coupling-decoupling members definite temperature gradients are produced between...
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4670741 |
Smoke detection apparatus
In a smoke detection system, smoke density in a sampling chamber is measured by flashing a strobe light through the chamber and sensing light flux emitted from the chamber and comparing it with...
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4667106 |
Fire identification and discrimination method and apparatus
In a method and apparatus for determining the fuel of a fire, an ionization detector is positioned to detect the ionization level in the fire gases. The natural logarithm of the ratio of the...
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4662758 |
Optical detector assembly
An optical detector assembly comprises a casing formed therein with a through bore having front and rear openings and a pair of opposite cavities located at both sides of the through bore, an air...
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4651013 |
Smoke detector with changeable pulse light emitting interval for monitoring purposes
A smoke detector comprising a light emitting section from which pulse light is radiated to a detection area with a predetermined period and a light receiving section which is disposed so as to be...
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4647780 |
Apparatus for measuring smoke density
Smoke density measuring apparatus comprising a duct (1) through which the smoke passes, a light source (4) and a photodetector (6) located on opposite sides of the duct adjacent openings (2,3) in...
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4640129 |
Method and apparatus for detecting toner concentration of two-component dry developer
A method of detecting the toner concentration of a two-component developer comprising a mixture of carrier particles and toner particles for use in an electrostatic copying apparatus or the like...
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4631529 |
Electro-optical fluid detector
An electro-optical circuit for detecting fluid in a translucent or a transparent duct or tube, this circuit including an AC activated light emitting diode (LED) for transmitting a narrow beam of...
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4629903 |
Method of monitoring a catalyst feed and apparatus for implementing the method
A method for monitoring the feed of a catalyst, especially the feed of a catalyst employed in a gas-phase linear low density polyethylene process system through the intermediary of the...
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4614968 |
Contrast smoke detector
A system for detection of smoke by measuring changes in the contrast of a multi-contrast target disposed remotely from a photoelectric sensor. The obscuration of the detection path causes a...
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4583859 |
Filter cleaning system for opacity monitor
A filter cleaning system for an opacity monitor which has a light source and a light sensor on opposite sides of a first optical path through a gas whose opacity is to be measured, comprises a...
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4584484 |
Microscope for producing high resolution images without precision optics
A microscope, not employing conventional optical elements, is disclosed wherein a sample under examination is subjected to a moving pattern of illumination having alternate light and dark...
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4583001 |
Scanning system for mapping gas flow uniformity in a laser
A scanning system for mapping the degree of uniformity of gas flow in the cavity of a laser includes a carriage mounted for movement along a set of parallel tracks disposed along a side of the...
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4568424 |
Method for determining the end of devolatilizing in a coke oven and adjusting the coke cycle based thereon
In the operation of a by-product coke oven, in order to provide a coking cycle that meets an aim push time and also includes a coke soaking period of pre-selected length, the method of obtaining a...
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4566315 |
Meter for measuring erythrocyte settling rates
A novel meter is provided for measuring erythrocyte settling rates. It includes a base supporting a rack adapted to hold an array of tubes at an optimum settling angle and at least one tube adapted...
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4566791 |
Fluid sample cell comprising Fresnel sectors
A fluid sample cell for spectroscopic analysis of a fluid sample includes a fluid-tight compartment for the containment of a fluid sample which is defined by a radiant energy transmissive top, a...
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4567373 |
Centrifugal analyzer
A centrifugal analyzer comprising a container adapted for holding a sample, a centrifuge having a rotor which holds the container, a source of electromagnetic energy and an array of photodiode...
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4561779 |
Instrument for measuring concentration of substance in suspension
Disclosed is an improved turbidimeter or instrument for measuring the concentration of a suspension using diffuser means for converting incident light into diffused light before passing through a...
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4559813 |
System and device for detecting the forming of depot
System for detecting the forming of depot inside a transport channel for transporting particles in a light transparent carrier fluid, comprising a light transmitter, a light receiver, a bifurcated...
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4559453 |
Smoke detector with a radiation source operated in a pulse-like or intermittent mode
In a line extinction detector using a pulse-operated radiation source, a radiation receiver is connected to an input amplifier of an evaluation circuit. The output pulses generated by the input...
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4547673 |
Smoke and flame detector
Apparatus for detecting flame or smoke, having a radiation detection tube enclosed in a housing, facing the exterior through a transparent window at one end of the housing, and having a radiation...
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4544840 |
Fiber optic fluid impurity detector
A generated signal is passed through an elongated signal conveying element positioned preferably perpendicular to the surface of a fluid the level of which is to be measured. The signal is directed...
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4538064 |
Device for the monitoring of ice formation
The device contains a first light source (21) that emits a continuous light and a second light source (18) that emits intermittent light, a photodiode (19) that responds to the light of both light...
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4528555 |
Light extinction smoke detector
A light extinction type smoke detector which uses simple pulsed light or modulation pulsed light to reduce energy consumption, and precisely discriminates smoke generated by fire from extraneous...
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4499852 |
Apparatus for regulating plating solution in a plating bath
Apparatus for maintaining the concentration of components of a plating solution substantially constant during use of a plating bath. The apparatus comprises a sensor suspended in the plating bath...
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4474056 |
Erythrocyte settling rate meter
A novel meter is provided for measuring erythrocyte settling rates. It includes (a) a base supporting rack adapted to hold an array of tubes at an optimum settling angle and at least one tube...
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4470697 |
Method of measuring the concentration of gas in the presence of liquid particles
To evaluate the droplet evaporation and liquid/vapor phase interactions in aerosols and sprays, an optical method for measuring the concentration of the gas phase is provided. Two laser beams are...
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4434364 |
Method and apparatus for underwater detection of hydrocarbons
Method and apparatus for detecting the presence of hydrocarbons and other substance that fluoresces or absorbs light within a body of water which utilizes a controlled submersible vehicle scanning...
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4432649 |
Optical apparatus for measuring transmission or absorption along a measurement path
A light transmitter transmits a beam of light along a measurement path to a light receiver which receives the light beam either directly or via a retro-reflector. The light receiver forms...
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4419903 |
Method and apparatus for detecting insufficient liquid levels
A method and apparatus for determining an insufficient liquid volume. The invention includes an electromagnetic sensing device in a conduit into which the sample liquid is mixed. The...
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4416542 |
Nighttime/daytime diffuse attenuation coefficient device for seawater
An apparatus and method for measuring the diffuse absorption coefficient of seawater provides reliable readings. An emitter of pulsed light is disposed below the water's surface and an irradiance...
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4393479 |
Method for erasing data of a non-volatile semiconductor memory integrated circuit
A non-volatile semiconductor integrated circuit has floating poly-silicon gates on the channel regions of memory cells. The information electronically stored in said floating gates is erased by the...
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4391129 |
System for monitoring physical characteristics of fluids
An apparatus and method are described for measuring physical characteristics of a fluid, by placing a drop (16) of the fluid in a bath (14) of a second fluid and passing acoustic waves through the...
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