Abstract: A known powered air-purifying respirator has an alarm that is preset to be actuated whenever a Pitot static sensor indicates that the airflow has dropped below a safe level. The invention permits such a respirator to be used with either a tight-fitting facepiece or with a loose-fitting hood or helmet and, without adjusting the preset alarm, can indicate that the airflow has dropped below the proper minimum for whichever is being used. This is accomplished by supplying the respirator with two breathing tubes, a first of which is unobstructed and can be fitted only to a loose-fitting hood or helmet that required high airflow. The other breathing tube can be fitted only to a tight-fitting facepiece and has a protuberance that reduces the cross-sectional area of the chamber in which the Pitot static sensor is mounted so that the alarm is actuated only when the airflow drops below a level that is lower than the alarm-sounding level when the first breathing tube is being used.

Abstract: The present invention relates to a continuous method for manufacturing an electret filter medium from dielectric material having an open or porous structure, said method comprising the steps of continuously feeding a web of dielectric material with a substantially closed dielectric foil adjacent to at least one major face thereof into a corona discharge device, reducing the thickness of the web of dielectric material and charging the web of reduced thickness dielectric material by means of a corona discharge and to apparatus for carrying out said method.

Abstract: Composite prelaminated tape for forming closures for disposable diapers comprising a pressure-sensitive adhesive fastening tape partially overlying a release tape and a unifying strip bridging an edge of the release tape and the adjacent portion of the fastening tape. In use, the fastening tape and the release tape are bonded permanently to opposite sides of one edge of the diaper, the end of the fastening tape overlying the release tape being thereafter lifted free from the release tape and adhered to the opposite edge of the diaper from which it can be respectively reused and re-adhered to the edge of the diaper.

Abstract: A high temperature oil containment boom cover blanket for conventional elongated cylindrical oil containment booms is disclosed. The cover blanket, when installed onto a conventional oil containment boom effectively converts the boom into a high temperature oil containment boom which allows for in situ burning of spilled oil during cleanup operations.

Abstract: A catalytic converter having a monolithic ceramic catalytic element mounted within a metallic casing by a resilient flexible intumescent sheet having generally sinusoidal edges such that mounting pressure is applied to the lateral surface of the ceramic monolith in the area circumscribed by the generally sinusoidal edges is disclosed. Other methods for applying mounting pressure on the ceramic monolith are also disclosed.

Abstract: A microporous liquid impermeable but vapor permeable sheet material useful as a backsheet for disposable absorptive devices such as disposable diapers, incontinent devices, sanitary napkins, and panty liners is disclosed. This backsheet provides unexpected useful attributes such as compatibility with available closure tapes and embossibility with translucent patterns.

Abstract: The present invention relates to a continuous method for manufacturing an electret filter medium from dielectric material having an open or porous structure, said method comprising the steps of continuously feeding a web of dielectric material with a substantially closed dielectric foil adjacent to at least one major face thereof into a corona discharge device, reducing the thickness of the web of dielectric material and charging the web of reduced thickness dielectric material by means of a corona discharge and to apparatus for carrying out said method.

Abstract: A tanning blanket for reflecting a large portion of the solar radiation which is otherwise scattered in directions away from the person using the blanket, towards the flanks of the person, the blanket having a plurality of incremental reflectors in a Fresnel pattern on a flexible substrate, which reflectors reflect incident solar radiation toward the person and distribute the reflected radiation across the flanks of the person.

Abstract: Granular sorbent material comprising a granular high surface area support impregnated with a water soluble, essentially non-volatile primary or secondary amine with equivalent weight less than about 400 and bearing either zero or two carbonyl substituents attached directly to the amino nitrogen atom is disclosed. The resulting material can be used as the filtration media in respirators, powered air purifiers, room air purifiers, ventilation filters, exhaust filters, process gas filters and the like to reduce the formaldehyde content of air.

Abstract: A fire protection system for installation about the periphery of a cable tray consisting of parallel side rails and spaced cross members fitted between the side rails and comprising heat expanding, fire retardant composite sheet material joined together to form a protective enclosure around the cable tray and means for mechanically joining sections of the fire protection system are disclosed.

Abstract: Flexible intumescent sheet materials containing low density filler components to provide low density mounting mats which reduce the mount density to prevent ceramic diesel particulate monolith cracking are disclosed.

Abstract: Substrates of ceramic or plastic are formed with embossed patterns in bas-relief which are coated by transfer processes to provide conductors. The articles are especially useful for high speed automatic processing and further have improved electrical properties particularly for high frequency applications.

Abstract: A connector system for connection of leadless large scale integrated circuit devices to a printed circuit board or to other termination means is disclosed.

Abstract: Indicator material for monitoring personal exposure to hazardous substances in ambient air comprising a pigment material, a binder and a sensitizer coated upon a transparent support member as a porous coating which permits gaseous diffusion throughout the coating is disclosed. Detection or monitoring is effected when the indicator material undergoes a visually observable reaction with hazardous material in the atmosphere at room temperature.

Abstract: Flexible intumescent sheet materials having greatly decreased negative expansion characteristics in the range of 200.degree. to 400.degree. C. and which are thermally resistant and resilient after expansion are disclosed. The flexible intumescent sheets are particularly useful for mounting automotive catalytic converter monoliths.

Abstract: A patella prosthesis having a plurality of bearing surfaces designed to provide low-friction interaction throughout the entire range of leg extension and flexure with a metal condylar replacement prosthesis is disclosed. The prosthesis provides a combination of a reinforced patella surface and a femoral prosthetic surface having both a prolonged anterior flange and a central opening for the passage of the cruciate ligaments.

Abstract: A powered air respirator which provides hardhat (safety helmet), respiratory, eye and face protection and comprises a hardhat, a shell member spaced from and overlying the hardhat, air filtering means in the space between the shell member and the hardhat, a face shield assembly attached to and depending from the front of the shell member, a transparent face shield in said face shield assembly, face sealing means on the peripheral edge of said face shield assembly to seal against a user's face from temple to temple and an air circulating means located in the rear portion of the shell member is disclosed.

Abstract: The disclosure relates to flexible heat expanding, fire retardant composite materials comprising an intumescent component in granular form, an organic binder component such as an elastomer, an organic char-forming component and fillers such as clay, silica, synthetic organic staple fibers or inorganic fiberglass or ceramic fibers. These composites, when subjected to heat at about 110.degree. C., can intumesce up to ten times their original volume.

Abstract: A composite or tape comprising a thin, flexible, compliant, strong, stressable substrate, a layer of flexible, resilient intumescent material adhered to the substrate and adhesive means for closing the substrate on itself. The composite or tape can be applied to a rigid body, the adhesive means applied and the intumescent material exfoliated to provide insulation enclosed by the substrate which becomes a stressed skin.