US Government as Represented by the Secretary of the Army

Other

USA as Represented by Secretary of the Navy

Bernard V Gerber

Hugh R Carlon

Mark A Guelta

Hugh R Carlton

An improved process of passing an aerosol mixture through a filter. The asol mixture solely contains about 70 to 76% isostearic acid, about 6 to 7% isopalmatic acid, about 7 to 11% myristic acid, and about 4 to 5% palmitic acid.

Method for measuring filter efficiency

An improved method of testing a particulate filter. This is accomplished by assing a salt nuclei coated with isopropyl isostearate.

Method for measuring and testing the efficiency of gas mask filters

An improved process of passing an aerosol mixture through a filter. The asol mixture solely contains in percentage, by volume, of about:

Method of measuring the efficiency of gas mask filters using non-toxic

An improved method of testing a particulate filter. This is accomplished by assing a salt nuclei coated with a mixture containing isostearic acid, isopalmatic acid, myristic acid and palmitic acid through the filter to be tested.

Method of measuring the efficiency of gas mask filters, respirators and

An improved process of passing an aerosol mixture through a filter. The aerosol mixture solely containing the following in percentage, by volume, of about:

Method for testing the efficiency of gas mask filters using

An improved method of testing a particulate filter. This is accomplished by assing a salt nucleus coated with a composition containing a poly-alpha olefin having chain length in %, by volume, of about 97-99% of 20 carbon atoms, and about 3% of 30 carbon atoms.

Method for the generation of monodispersed aerosols for filter testing

An improved process of passing an aerosol mixture through a filter. The asol mixture solely being a poly-alpha olefin having a content of chain lengths in % by volume of about:

Method of measuring the efficiency of gas mask filters using

An improved method of testing a particulate filter. This is accomplished by assing the following ester mixture on salt nuclei consisting essentially in percentage, by volume, of about:

Method of testing the efficiency of gas mask filters using monodispersed

An improved process of passing an aerosol mixture through a filter. The asol mixture solely being a poly alpha olefin having a content of hydrocarbon % by volume of:

Method of testing the efficiency of gas mask filters using poly-alpha

An accurate, instantaneous determination of geometric standard deviation gma.g of particle size distribution of aerosols, permitting verification that the test aerosols fall within suitable specifications and are giving test results that are truly representative of the degree of protection from smoke and aerosols that representative mask filters and filter media afford under actual use conditions. Provided herein is a more precise means of measuring aerosol penetration of gas masks. Determination of geometric standard deviation includes the steps of transmitting focused and coherent or optically filtered light from a source to a chamber containing an aerosol sample and then detecting and comparing the intensity of polarized light scattered at a first angle relative to said light source to the intensity of polarized light scattered at a second angle relative to said light source. Angles are selected to optimize signal-to-noise of the instrument, not as historically done to optimize ratios of one signal to the other as determined by calculation but whose measurement angles do not correspond to maximum strengths of the individual signals. The first and second detector angles as determined by this new method can by selected by manual adjustment of a pivoted detector, or by two or more detectors permanently affixed at two or more preselected angles, or automatically to compensate for changes in particle size when test aerosols of a constant size connot be continuously generated.

Method and apparatus for improved gas mask and filter test penetrometer

The invention concerns a baking pan assembly for forming a cavity in a muffin to which a filling may be subsequently added. The recessed cup portion of a baking pan is provided with a keyed-orifice. A conical or other symmetrical insert having a key mate with the orifice, such that the insert is centrally located in the recessed cup bottom. Alternately, single use conical or other symmetrical inserts may be placed in the recessed cup, made of paper, foil, heat resistant plastic, etc. A retaining plate may be positioned above the pan if desired to restrain the batter as it rises to form a flattened surface opposite the cavity for perfect stability once the muffin is inverted.

Muffin baking pan for producing muffin with open cavity

A gas comparison probe contains first and second sensor elements isolated om each other. Air is drawn across a surface to be monitored and directed onto the first sensor element. Air is drawn from a location spaced away from the surface to be monitored and directed onto the second sensor element. A flow constrictor in the air flow path to one of the sensor elements is used to calibrate the outputs of the two sensor elements under known conditions before attempting to monitor air flow which may contain a gas to be detected.

Growing community of inventors

Havre de Grace, MD, United States of America

Bernard V Gerber