摘要:
The nature of the technical disclosures of my new invention will demonstrate visually and with expression, the uniqueness of having a “Utility Pouch and Attachments” to carry school supplies or to a work place around the waist. The art of this new invention will minimize looking in back packs for certain school supplies or not enough storage spaces at work to place them; when these supplies are ready and available in separate attachments around the waist.
摘要:
This invention relates to electron emitting semiconductor materials for use in dynodes, dynode devices incorporating such materials, and methods of making the dynode devices. In particular, the invention relates to emissive materials having an electron affinity that is negative and which have low resistivity. The invention also relates to electronic devices such as electron multipliers, ion detectors, and photomultiplier tubes incorporating the dynodes comprising the materials, and to methods for fabricating the electronic devices. The secondary electron emitters of the present invention comprise wide bandgap semiconductor films selected from diamond, AlN, BN, Ga.sub.1-y Al.sub.y N where 0.ltoreq.y.ltoreq.1 and (AlN).sub.x (SiC).sub.1-x where 0.2.ltoreq.x.ltoreq.1. The films are preferably single crystal or polycrystalline. The films may be continuous or patterned.
摘要翻译:本发明涉及用于倍增极的电子发射半导体材料,结合这种材料的倍增极装置以及制造倍增极装置的方法。 特别地,本发明涉及电子亲和力为负的且具有低电阻率的发射材料。 本发明还涉及电子装置,例如电子倍增器,离子检测器和结合包含材料的倍增电极的光电倍增管,以及用于制造电子装置的方法。 本发明的二次电子发射体包括选自金刚石,AlN,BN,Ga1-yAlyN,其中0≤y≤1和(AlN)x(SiC)1-x的宽带隙半导体膜,其中0.2 < x = 1。 膜优选为单晶或多晶。 膜可以是连续的或图案的。
摘要:
An improvement for a dual flush mechanism which permits a partial flush of a toilet in addition to the full flush. When the operator pushes the partial flush handle down, the partial flush mechanism lifts the flapper valve off the annular valve seat a small distance by raising the connected flush lever arm a similarly small distance. The improvement is a flush lever arm holder adapted to suspend the flush lever arm in the slightly raised partial flush position after the operator has released the partial flush handle. More particularly, a rotatable cam resides on a plate secured to the toilet tank wall, the cam, operably attached to a float, engages the underside of the flush lever arm such that the float holds the rotatable cam under the flush lever arm to secure it in the raised position during the partial flush. As the water level in the toilet tank falls, the float begins to fall with the water and lowers the cam holding up the flush lever arm. The flush lever arm descends allowing the flapper valve to cover the annular valve seat, terminating the partial flush. The toilet tank begins to refill and the float again urges the cam against the underside of the flush lever arm, but is insufficiently buoyant to raise the flapper valve off the valve seat. It sits there awaiting the operator to push the partial flush handle again.
摘要:
A process for rehabilitation of internally reinforced concrete which comprises applying to surface areas of the concrete a temporary sprayed-on layer of a self-adherent, electrolytic material comprised of cellulosic pulp fiber mixed with liquid electrolyte. A distributed electrode means, preferably a wire grid, is embedded between layers of the self-adherent coating, and preferably is supported by spaced-apart, non-conductive battens. Voltage sufficient to develop a current of about 1-5 amps/m.sup.2 is applied between the reinforcement and the distributed electrode, to cause migration of chloride ions from the concrete into the electrolytic coating. When the chloride content of the concrete has been reduced to a desired level, the voltage is discontinued and the adherent electrolytic coating and distributed electrode are removed. Preferred electrolytes include water or other solutions, such as calcium hydroxide. Desirably, the distributed electrode is formed of a ferrous material reactive with chlorine, to minimize the release of free chlorine gas into the ambient.
摘要:
A process and system for rehabilitating mature concrete structures, which have become carbonated and/or infused with chlorides and thus represent a corrosive environment for internal reinforcing steel. The surface of the concrete is first repaired with a special mortar having resistivity and capilarity consistent with the parent concrete and the process requirements. An elongated, flat, flexible, ribbon-like electrode element is supported in spaced relation over the surface of a concrete area to be treated, being threaded back and forth and oriented in edgewise fashion to the concrete surface. Thereafter a self-adherent, cohesive mixture of delignified cellulose pulp fibers and a liquid electrolyte solution is sprayed onto the surface of the concrete, to a level to cover and embed the ribbon-like electrode element, forming an electrolytic medium associated with the electrode element. A DC voltage is impressed between the internal reinforcement and the embedded electrode element to effect electro-chemical chloride removal and/or realkalization of the concrete in a procedure of finite time duration. Preferably, the electrode strip is passed about conductive supports at one side of the treating area, so that the voltage is connected to the electrode strip at a plurality of locations. Flame and smoulder retardants are mixed with the dry cellulose fibers in advance of being applied to the concrete, by spraying through the previously mounted electrode structure.
摘要:
A process for rehabilitation of internally reinforced concrete which comprises the temporary application of an adherent coating of an electrolytic material, formed of cellulosic pulp to surface areas of the concrete. Distributed electrode means, preferably a ferrous metal wire grid, is embedded in the adherent coating. Voltage sufficient to develop a current of about 1-5 amps/m.sup.2 is applied between the reinforcement and the distributed electrode, to cause migration of chloride ions from the concrete into the electrolytic coating. When the chloride content of the concrete has been reduced to a desired level, the voltage is discontinued and the electrolytic coating and distributed electrode are removed. Particularly for tensioned reinforcement, the process monitors polarization of the tensioned steel to prevent hydrogen embrittlement.
摘要:
An electro-chemical process for rehabilitating steel reinforced concrete, wherein a distributed flow of electrical current is established between internally embedded reinforcing steel, connected as a cathode, and an external, distributed electrode, connected as an anode. Current flow at a rate of at least 0.1 ampere per square meter of surface area of the embedded reinforcement is continued for a time sufficient to provide a total charge of at least about 100, but not substantially more than 2000, ampere-hours per square meter of surface area of the embedded reinforcement. This results in steel with a clean surface, surrounded by concrete which is chloride free and highly alkaline. After discontinuance of the electrochemical treatment, the embedded steel slowly passivates by forming a protective surface oxide. The process is significantly more economical than known procedures, yet is reliably effective. Importantly, the process enables a large area of a structure, of possibly the entire structure, to be treated by applying the electrical charge, with increased voltage and current, to only a limited predetermined area of the structure.
摘要:
Diamond and diamond-like materials having photochemically modified surfaces, and a process for photochemically modifying the surface of diamond and diamond-like materials. Preferably, the substrate to be modified is a single crystal, polycrystalline film or powder of diamond or any silicon carbide polytype. Photochemical modification of the surface enables the addition or exchange of specific surface functional groups. These surface modifiers change the chemical, adhesive and electronic properties of the diamond and diamond-like substrate materials. The modified subtrates are useful for producing semiconductor devices for use at high temperatures, high powers, and in otherwise harsh environments.
摘要:
A method for realkalizing concrete, layers of which have become carbonated and thus acidified as result of exposure to air of the surface of the concrete. The method presupposes that the concrete still contains adjacent layers that have not yet become carbonated. A substantially water-tight adherent coating is applied to the surface of the concrete that is exposed to air. Thereafter, the concrete is caused to become saturated with water from a source external to the concrete structure, and this condition of saturation is maintained for a period of time sufficient to effect a diffusion of alkaline materials from the relatively less carbonated layers of the concrete into the relatively more carbonated layers thereof. The carbonated layers thus become realkalized, so that further deterioration of the concrete structure is significantly arrested.
摘要:
An electro-osmotic dewatering procedure is disclosed for removing water from saturated, porous building materials, such as concrete, brick and the like. A controlled, cyclical voltage is applied to an electrode system, to effect osmotic migration of water from an anode electrode, located within the structure or in contact with it, to a cathode electrode, typically spaced from the structure but in electrical circuit with it. The cycle of operations includes a first energy pulse in a direction to effect osmotic migration, followed by a substantially shorter but definite pulse of reverse polarity to prevent or minimize formation of insulating gas films and/or corrosion products. Transition from the primary pulse to the reverse pulse, and from the reverse pulse to the subsequent primary pulse, is at a controlled rate to permit discharge of stored voltage, as a function of inherent capacitance of the system, and to avoid generation of RFI radiations. For treating reinforced concrete, cycling is preferably controlled automatically, as a function of the monitored passivity or non-passivity of the internal reinforcement, so as to avoid creation of corrosion products. Certain aspects of the invention are applicable to other treatments of reinforced concrete, such as realkalization.