摘要:
An exhauster baffle is provided that may be used to prohibit fluid flow through a cavity except when a pressure on one side of the exhauster baffle is greater than a pressure on another side of the exhauster baffle. The exhauster baffle includes a body portion defining an opening, a sealer disposed on the body portion, and a flap disposed over the opening for regulating fluid flow through the opening. In one embodiment, the flap exposes the opening of the body portion to allow fluid to flow through the cavity when the pressure on one side of the exhauster baffle greater than the pressure on another side of the baffle to equalize pressure.
摘要:
A baffle assembly for engaging a panel and a method of manufacturing the same are disclosed. A baffle assembly may include at least two baffles, each having a rigid carrier and an expandable material, which are linked by a connecting member which allows each baffle to pivot about the connecting member. The baffles may each include an attachment member configured to engage a first aperture and a second aperture, respectively, in a panel. A method of manufacturing a carrier for engaging a panel may include forming at least two baffles, and forming a connecting member between the baffles that allows the baffles to pivot about the connecting member.
摘要:
A severe storm warning system includes an atmospheric pressure sensor utilizing an air-filled chamber with a first pressure sensor mounted between the interior of the chamber and the atmosphere and being located within the chamber interior and a second pressure sensor mounted between the interior of the chamber and the atmosphere and being located outside the chamber. Both sensors are formed of multiple-plate, floating plate capacitors which are movable in response to pressure changes. Electronic circuitry periodically determines what pressure changes have occurred and compares the changes to the changes associated with a predetermined signature of the type of severe storm being determined. Indicators including alarms are provided if a known sequence of pressure changes is detected.
摘要:
The invention relates to an improved felt for a paper making machine having a batt formed from polyamide-12 needled to a woven base. The polyamide 12 batt may contain an antioxidant. The felts in accordance with the invention show much improved longevity and resistance to "flattening" in service.
摘要:
A method and apparatus for rapidly cooling optical fiber comprising passing optical fiber through an enclosure having a flat black internal surface, the walls of said enclosure having symmetrically oriented perforations or other symmetrically oriented means of passing cryogenic gas through the walls to contact optical fiber within the enclosure, the enclosure surrounded by a gas plenum to which gas is supplied to facilitate the symmetrical passage of cryogenic gas through the walls, whereby the cryogenic gas symmetrically contacts and cools the optical fiber and also serves to cool the walls of the enclosure.
摘要:
In a process for operating a fluidized bed, wherein the bed particles have a Reynolds number of less than 20, at a predetermined cryogenic temperature comprising (i) bringing a cryogenic fluid into indirect contact with the bed; (ii) permitting the fluid to vaporize at the area of indirect contact whereby the bed is cooled; and (iii) utilizing the vapor from step (ii) to fluidize, and further cool, the bed, said cooling in steps (ii) or (iii) being from ambient temperature to the predetermined cryogenic temperature,the improvement comprising changing, continuously or stepwise, the minimum fluidizing mass flow of vapor as the temperature of the bed changes in accordance with a specified equation.
摘要:
Sheet materials for cardiovascular and other prosthetic implants are fabricated of synthetic elastomers. These materials are characterized by molecular configurations that produce a nonlinear tensile modulus characteristic similar in shape to that of natural tissue. Selected elastomers, when formed as sheet material of appropriate geometrical configuration, promote the formation of natural tissue thereon which is appropriate for the mechanical characteristics desired.
摘要:
Prostheses for inadequate or diseased heart valves and blood vessels, formed of fabrics comprising multifilament synthetic yarns. For a heart valve the fabric is supported on a three-lobed frame. During manufacture, the fabric is subjected to a plural step compressive shrinking and crimping process to impart nonisotropic elastic compliance approximating the natural mechanical properties. The resulting composite structures are free of thrombogenic complications.
摘要:
An exhauster baffle is provided that may be used to prohibit fluid flow through a cavity except when a pressure on one side of the exhauster baffle is greater than a pressure on another side of the exhauster baffle. The exhauster baffle includes a body portion defining an opening, a sealer disposed on the body portion, and a flap disposed over the opening for regulating fluid flow through the opening. In one embodiment, the flap exposes the opening of the body portion to allow fluid to flow through the cavity when the pressure on one side of the exhauster baffle greater than the pressure on another side of the baffle to equalize pressure.
摘要:
A carrier for engaging a panel and a method of making a carrier for engaging a panel are disclosed. The carrier generally includes a base portion, an attachment member disposed on the base portion which is operable to engage a panel, and a springbar disposed on the base portion. The method generally includes forming a base portion, forming an attachment member, and forming a springbar on the base portion. The attachment member cooperates with the base portion to define a maximum panel thickness, and the springbar engages panels having a thickness less than or equal to the maximum panel thickness to provide tension between the base portion and a panel.