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4164139 |
Asphalt penetration indicator
Water penetration of bituminous pavement is measured by a conduit comprising a cylindrical tube having a flat outwardly extending lower flange and a closed top having a circular center opening into...
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4160374 |
Apparatus for measuring the diffusive resistance of plant stomata
Apparatus for measuring the diffusive resistance of plant stomata includes a cup adapted to be sealingly clamped to a plant leaf being tested to define an enclosed air volume in the cap adjacent...
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4155248 |
Method and apparatus for determining the pressure drop and circumference of filter rods
The pressure drop through and the circumference of filter rods for cigarette filters or the like are determined by a completely automated rod test station that consists of a measuring unit and a...
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4154090 |
Process and apparatus for multiple testing of wrappers of cigarettes or the like
The wrappers of filter cigarettes wherein wrapper portions surrounding the filter mouthpieces have holes for admission of atmospheric air into the column of tobacco smoke are tested during sidewise...
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4150578 |
Apparatus for measuring excess pore water pressure
An elongated tubular housing has differential pressure transducers at spaced points therealong and electrically insulated therefrom by a mounting means. Each mounting means has a diaphragm exposed...
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4148212 |
Method and device for determining the pore water pressure in a soil
Method of determining the pore water pressure in a soil, which includes installing a water-filled tube bearing a pore pressure sound at its lower end and said pore pressure sound bearing a filter...
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4148217 |
Evaluating surfactants
A method for evaluating foam-producing surfactants by measuring the resistance to the flow of a gas, for example, nitrogen, through a standard sand pack containing a solution of the surfactant. The...
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4135896 |
Gas purifier having rechargeable adsorber filter with removeable rechargeable sample canister
A gas purifier having a removeable sample canister apparatus and gas adsorber in combination is provided for use in atmospheric containment and cleanup systems in nuclear power plants and other air...
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4133651 |
Methods for removing radioactive isotopes from contaminated streams
Methods for removing radioactive isotopes from contaminated gas streams for use in atmospheric containment and cleanup systems in nuclear power plants are provided. The methods provide for removal...
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4128004 |
Method and apparatus for determining permeability of filter media
In the measurement of the permeability of a filter medium a cake of the medium is formed in a holder by supplying an excess of the medium, as a suspension under pressure, to the holder, the...
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4127025 |
Cigarette testing
In the manufacture of ventilated filter-tipped cigarettes the continuous wrapper web for the filter rod is formed, at least at longitudinally spaced positions, with perforations or...
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4112739 |
Process and apparatus for the isostatic measurement of the permeability of a material to the passage therethrough of a gas or vapor
A gas-tight chamber has positioned therein a material to be tested such that first and second opposite sides of the material are isolated from each other within the chamber. An enclosed reference...
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4083228 |
Gas comparison pycnometer
A pycnometer apparatus is disclosed for accurately determining the volume of a condensed material sample. Equal free space volumes are established in a pair of gas filled chambers before and after...
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4072044 |
Liquid level controller and soil test instrument
A portable, automatic liquid level monitoring and recording instrument is disclosed for use in measuring the capacity of soils to absorb water. A self-contained power source, timer and vertically...
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4070903 |
Outflow meter for measuring surface drainage characteristics
An outflow meter for measuring the drainage characteristics of a surface comprising a disc having a surface engaging face which is disposed in contact with the surface during use of the meter, an...
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4069704 |
Variable length encapsulating pressure drop tester
An apparatus for testing tobacco smoke filter rods and similar articles of varying lengths for pressure drop across the opposed ends of a rod encapsulated in an air-impervious sleeve comprising a...
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4064740 |
Apparatus and method for measuring permeability
A material whose permeability to a fluid, such as a gas, is to be measured, forms at least part of the wall of a chamber which is otherwise impervious to the fluid, and the fluid is located within...
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4059008 |
Method and device for pore pressure sounding
An improved method and apparatus are disclosed for determining the nature of soil layers by driving a sound carrying a pressure transducer continuously through the soil, measuring the transient...
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4052885 |
Portable device and method for determining permeability characteristics of earth formations
The invention is directed to a device which is used for determining permeability characteristics of earth formations at the surface thereof. The determination of the maximum permeability direction...
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4050995 |
Method for determining water vapor transmission rate or water content
A cell for absorbing and electrolyzing the water vapor transmitted from a sample used in an apparatus for rapidly determining the water vapor transmission rate through plastic films or like...
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4050291 |
Filter condition responsive device compensated for changes in medium flow
A filter condition responsive apparatus for a range or stove vent system containing a first filter for filtering grease and a second series connected filter for the removal of odors. A first...
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4047422 |
Process for measuring permeability to gas of walls and/or closure of three-dimensional encasing elements
A filled or gas encasing element to be tested is placed in a measuring chamber. The free space between the element and the chamber is filled with filler elements to prevent bursting or inflation of...
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4033733 |
Air filter gauge
A gauge detecting the presence of a restriction placed upon an air stream passing through a filter in connection with an internal combustion engine, said gauge including a linear indicator to show...
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4014209 |
Air filter condition indicating device
An air filter condition indicating device particularly adapted for use with an air filter positioned in an air flow path, such as in an air induction system of an internal combustion engine for...
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3996788 |
Flow resistance apparatus and method for assembled acoustic panels
A puck to contact an acoustic panel has open-ended compartments to flow air through then back through the face sheet of an acoustic panel while measuring the air pressure difference across the face...
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3977253 |
Pool filter pressure gauge
A gauge for a pool filter in which the gauge includes a housing mounted on top of the filter, the housing having an interior chamber which is fluid connected at the bottom to the upper interior of...
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3967491 |
Cigarette testing apparatus with inclined slidable sealing means
A device for testing cigarette wrappers includes a stationary member past which cigarettes are carried by a conveyor, the stationary member defining a suction chamber for producing an air flow...
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3962904 |
Process for measuring, controlling and optimizing gas flow through a sinter mixture on travelling grates
A process for measuring, optimizing and controlling the gas permeability of a sinter mixture on a travelling grate by adjusting the flow of air and/or fuel to the furnace to maintain a zero...
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3962906 |
Method and apparatus for testing cigarettes or the like
Cigarettes are tested with air streams which are caused to pass lengthwise through the fillers while the cigarettes move sideways past a testing station. One or two stationary chambers for air at...
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3960001 |
Bag filter leak detection
A method for the detection of leaks in bag filter apparatus is disclosed wherein there is employed a leak tracer composition comprising a gaseous dispersion of a very light, sub-micron particulate...
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3948084 |
Apparatus for testing cigarettes or the like
A testing apparatus for cigarettes or the like has a rotary drum having axially parallel flutes for cigarettes, at least one ring-shaped carrier which is adjacent to one end and is driven at the...
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3946596 |
Leaf filter test and apparatus
A simple and rapid test, and an apparatus for use therein, is described for measuring the filtration, or drainage, characteristics of a fibrous slurry. The results obtained by this test are...
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3935745 |
Pore water pressure measuring device
A pore water pressure metering device incorporating a pressure meter and a force meter influenced by said pressure meter. The device also includes a power member arranged to control the pressure...
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3926561 |
Gas analysis employing semi-permeable membrane
A semi-permeable membrane is employed in gas analysis utilizing Fick's First and/or Second Laws of Diffusion. In some embodiments a series of time-separated plateaus is obtained, the timing of the...
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3914995 |
Fuel additive agent supplying device for internal combustion engines
Air flowing to a fuel additive feed device passes through a filter and thence through a throttling valve and a flowmeter comprising an upright transparent tube with a downwardly tapering interior....
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3902068 |
Method and apparatus for measuring the gas transmission through packaging materials
The material to be tested is clamped between the two halves of a diffusion cell so as to provide first and second cavities to either side of the material. A test gas is introduced into the first...
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3892126 |
Method and apparatus for facilitating testing the liquid absorptivity of soil
Means are provided for measuring substantially at eye level the extent of fall or rise, within a measured period of time, of the liquid level within a test hole of predetermined size filled with a...
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3889521 |
Static gas pressure measuring device
Apparatus for measuring the gas permeability of a porous layer of material in which provision is made for contacting the surface of the porous layer of material with the downwardly directed open...
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3882714 |
Porosimeter
A porosimeter comprises a vacuum system and a measuring system to which a fluid pressure may be delivered during the measuring operation. The measuring system includes a dilatometer consisting...
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3865561 |
SELECTIVE PLUGGING OF FILTER ELEMENTS
This invention is concerned with the testing, while in use, of porous bags used as filters for removal of particulate matter from particulate matter-laden inlet air. It is directed primarily to the...
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3861196 |
APPARATUS FOR MEASURING IN SITU THE PERMEABILITY OF A CIVIL ENGINEERING WORKING STRATUM
The permeability of a flat surface is measured, by pressing down on the surface a central chamber surrounded by an annular chamber. The chambers are open at their bottom, and in the annular chamber...
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3859843 |
APPARATUS FOR MEASURING SURFACES BY MERCURY INTRUSION
An apparatus for practicing the technique of mercury penetration or intrusion to determine the pore size distribution of a porous test sample which utilizes centrifugal force and, as a consequence,...
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3850040 |
SORPTION ANALYSIS APPARATUS AND METHOD
Gaseous sorption analysis apparatus and method for the measurement at cryogenic temperatures of factors such as surface area, adsorption isotherms, and desorption isotherms. The disclosed system...
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3824823 |
FUEL FILTER TESTING APPARATUS
The invention disclosed herein provides an improved apparatus and system testing the efficiency of fluid filters by providing an automatic, continuously operating, test apparatus to accurately...
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3808876 |
AIR PERMEABILITY TESTER
A portable air permeability testing device to directly register the permeability of a surface. The device includes a hollow probe with a passageway therethrough and one open end of the probe...
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3769832 |
APPARATUS FOR TESTING CIGARETTES OR THE LIKE
A pneumatic cigarette testing apparatus wherein the drum which moves cigarettes sideways past a testing station carries one or two annuli of sealing devices having holders which are movable toward...
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3762211 |
METHOD AND APPARATUS FOR CONTINUOUSLY MEASURING THE POROSITY OF A MOVING WET POROUS CONTINUOUS SHEET
Method and apparatus for continuously measuring the porosity of a moving wet porous continuous sheet by removing water from the sheet by a first uniform application of a pressure differential...
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3760773 |
GAS GENERATING AND METERING DEVICE AND METHOD
An apparatus and method for generating a vaporized liquid additive (e.g., water) at an accurately controlled flow rate primarily to accurately meter the formed vapor additive to a carrier gas...
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3747415 |
METHOD AND APPARATUS FOR MEASURING ABSOLUTE DENSITIES
Disclosed herein is a method and an apparatus for measuring the absolute densities of fluids. The apparatus includes a sample cup and a sealing cap with a valve therein through which the cup can be...
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3736793 |
CARTRIDGE FLASH HOLE INSPECTION APPARATUS
An apparatus for inspecting the number and capacity of vent or flash holes in a cartridge case having an optical tester to count the vent holes and pass a case upon detection of a minimum number of...
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