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公开(公告)号：US4575463A
公开(公告)日：1986-03-11
申请号：US644305
申请日：1984-08-24
Applicant: Dipak R. Biswas , Satyabrata Raychaudhuri
Inventor： Dipak R. Biswas , Satyabrata Raychaudhuri
CPC classification number: C03C25/104 , C03C25/108 , C03C25/223
Abstract: An optical fiber which has just been drawn from an optical preform is provided with two external hermetic coatings. The primary coating is a metallic or dielectric coating provided by, for example, using a heterogeneous nucleation thermochemical deposition (HNTD) technique. This technique involves passing the fiber through a reaction zone which contains a gaseous medium that includes a reactant which decomposes, or a mixture of reactants which chemically react, at a predetermined temperature, to form the material of the coating. Such predetermined temperature is available from the heat of the fiber forming process which is retained at the fiber surface by means of a shielding element so that additional heating means is not required. The second coating may be deposited, by for example, using an HNTD or a chemical vapor deposition process. The resulting fiber may then be provided with an additional polymer coating layer.
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公开(公告)号：US4750806A
公开(公告)日：1988-06-14
申请号：US745046
申请日：1985-06-17
Applicant: Dipak R. Biswas
Inventor： Dipak R. Biswas
CPC classification number: C03C25/107 , C03C25/108 , G01N30/6078 , G02B6/4436 , Y10T428/2956
Abstract: Solid fibers or capillaries are coated with a metal, alloy or dielectric capable of withstanding temperatures in excess of 300.degree. C. and preferably 500.degree. C. The coating is deposited by a heterogeneous nucleation thermochemical deposition process occurring on the surface of the fiber.
Abstract translation: 固体纤维或毛细管涂覆有能够承受超过300℃，优选500℃的温度的金属，合金或电介质。通过在纤维表面上发生的异相成核热化学沉积工艺来沉积涂层。
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3.发明授权
公开(公告)号：US4485122A
公开(公告)日：1984-11-27
申请号：US477995
申请日：1983-03-23
Applicant: Joseph C. Williams , Jeff P. Garmon , Dipak R. Biswas , Dilip K. Nath
Inventor： Joseph C. Williams , Jeff P. Garmon , Dipak R. Biswas , Dilip K. Nath
CPC classification number: C03C25/107 , C03C25/108
Abstract: A metallic material coating is applied to the external surface of a freshly drawn optical fiber while such surface is still pristine by passing the optical fiber through a body of liquid metal-organic material which forms a layer on the fiber, and by subsequently removing all non-metallic components from the layer of metal-organic material by volatilizing the same. The optical fiber with the layer metal-organic material is passed through a baking oven in which at least the layer is heated to a baking temperature at which organic materials present in the metal-organic material are volatilized and the remainder is baked to the fiber. Then, at least the layer is fired in a firing chamber at a higher temperature at which the metal-organic material is decomposed into its volatile non-metallic and non-volatile metallic components, the latter remaining in the layer and the former becoming volatile and leaving the layer. Preferably, at least one layer of synthetic plastic material is applied over the thus obtained metallic layer. When the firing is done in an inert or reducing atomsphere, the metallic material is in its elemental form, while it is in its metal-oxide form when the firing operation is accomplished in an oxidizing atmosphere. Various printing inks and/or resinates may be used as the starting metal-organic materials in the process according to the invention.
Abstract translation: 将金属材料涂层施加到新拉制的光纤的外表面上，同时通过使光纤通过在纤维上形成层的液体金属 - 有机材料体，仍然是这样的表面，并且随后将所有非 - 通过挥发金属成分从金属 - 有机材料层。 具有层金属 - 有机材料的光纤通过烘烤炉，其中至少将层加热到烧结温度，在该烘烤温度下，存在于金属 - 有机材料中的有机材料挥发，其余部分被烘烤至纤维。 然后，在金属有机材料分解成其挥发性非金属和非挥发性金属组分的较高温度下，在烧制室中至少烧制该层，后者保留在该层中，并且前者变成挥发性的， 离开层。 优选地，在由此获得的金属层上施加至少一层合成塑料材料。 当在惰性或还原原子团中进行烧制时，金属材料为其元素形式，而当在氧化气氛中完成烧制操作时，其为金属氧化物形式。 在根据本发明的方法中可以使用各种印刷油墨和/或树脂酸盐作为起始金属 - 有机材料。
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公开(公告)号：US4443239A
公开(公告)日：1984-04-17
申请号：US379835
申请日：1982-05-20
Applicant: Dipak R. Biswas , Dilip K. Nath
Inventor： Dipak R. Biswas , Dilip K. Nath
IPC: C03B37/016 , C03B19/06
CPC classification number: C03B37/016 , Y10S65/901
Abstract: A tubular formation of particulate optical material is formed by a layer slurry deposition process which involves spraying layer after layer of slurry containing particles of the optical material onto a rotating rod-shaped bait. The composition of the slurry and particularly the index of refraction of the optical material may be varied from one layer to another or from one group of layers to another to obtain a graded or stepped refraction index profile in the formation, in an optical preform formed therefrom, and ultimately in the fiber drawn from the optical preform. The particles of the slurry are suspended in a liquid vehicle which evaporates in the spray stream or shortly after deposition, and are coated with an organic binder which holds them together in the layer and in the formation, so that the formation is self-supporting. Then, the organic binder is removed and the formation is sintered, followed by a collapse of the sintered tubular formation into the optical preform in the form of a solid rod. Then, optical fiber of the desired optical properties can be drawn from the optical preform. The associated apparatus includes a spray gun aimed at the bait rod, and a receptacle for the slurry from which the slurry is supplied to the spray gun. The bait rod is clamped in chucks and is rotated, while the spray gun moves in the axial direction of the bait rod in a plurality of passes to deposit the formation on the bait rod.
Abstract translation: 粒状光学材料的管状形成是通过层浆料沉积工艺形成的，其中包括将包含光学材料的颗粒的浆料层在旋转的棒状诱饵之后喷涂。 浆料的组成，特别是光学材料的折射率可以从一层改变到另一层，也可以从一组层变化到另一层，以在由其形成的光学预制件中在地层中获得渐变折射率或阶梯折射率分布 并且最终在从光学预型件中拉出的纤维中。 浆料的颗粒悬浮在液体载体中，其在喷雾流中或在沉积后不久蒸发，并且用有机粘合剂涂覆，其将它们保持在层中和在地层中，使得形成是自支撑的。 然后，除去有机粘结剂，烧结形成，然后将烧结的管状结构以实心棒的形式塌缩成光学预制件。 然后，可以从光学预制件中拉出所需光学特性的光纤。 相关联的装置包括瞄准诱饵杆的喷枪和用于浆料的容器，浆料从该容器供应到喷枪。 诱饵棒夹在卡盘中并旋转，同时喷枪以多次通过在诱饵棒的轴向方向上移动，以将地层沉积在诱饵杆上。
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公开(公告)号：US4592932A
公开(公告)日：1986-06-03
申请号：US624643
申请日：1984-06-26
Applicant: Dipak R. Biswas , Satyabrata Raychaudhuri
Inventor： Dipak R. Biswas , Satyabrata Raychaudhuri
CPC classification number: C03C25/108 , C03C25/104 , C03C25/223 , C23C18/165 , C23C18/31 , C23C18/32 , C23C18/50 , C25D3/12 , C23C18/1632 , C23C18/1669 , C25D17/00 , C25D17/02 , C25D21/10 , C25D3/04 , C25D3/20
Abstract: An optical fiber which has just been drawn from an optical preform is provided with two external hermetic coatings. The primary coating is a metallic coating provided by, for example, using a heterogeneous nucleation thermochemical deposition technique. This technique involves passing the fiber through a reaction zone which contains a gaseous medium that includes a reactant which decomposes, or a mixture of reactants which chemically react, at a predetermined temperature to form the material of the coating. The second coating is provided by immersing the fiber in a deposition bath containing a liquid medium which includes at least one reactant capable of deposition onto the primary coating to form a secondary coating. The deposition process may be achieved by applying a current through the medium at a predetermined temperature or by including reactants in the medium which will deposit at predetermined temperatures without applying a current. The resulting fiber may then be provided with an additional polymer coating layer.
Abstract translation: 刚刚从光学预型件中拉出的光纤设置有两个外部密封涂层。 初级涂层是通过例如使用异相成核热化学沉积技术提供的金属涂层。 该技术涉及使纤维通过反应区，该反应区含有气态介质，该气体介质包括分解的反应物或在预定温度下化学反应的反应物的混合物以形成涂层的材料。 通过将纤维浸入含有液体介质的沉积浴中来提供第二涂层，所述液体介质包括至少一种能够沉积到初级涂层上以形成二次涂层的反应物。 沉积过程可以通过在预定温度下施加电流通过介质来实现，或者通过在介质中包含将在预定温度下沉积而不施加电流的反应物来实现。 然后可以向所得纤维提供另外的聚合物涂层。
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Patent Agency Ranking
公开(公告)号：US20250067464A1
公开(公告)日：2025-02-27
申请号：US18237141
申请日：2023-08-23
Applicant: Dipak R. Biswas
Inventor： Dipak R. Biswas
Abstract: A waste heat extraction and capture device located in a stream of waste heat from a cooking appliance extracts heat energy from heated air destined for venting to an ambient exterior. A heat transfer element disposed in a vent hood above the cooking surface recovers heat for recapturing thermal energy that would otherwise be simply expelled. A fluid traveling through the heat transfer element is heated by the passing exhaust stream of waste heat, and can be stored for subsequent use, such as for potable hot water, interior space heating, or other cooking processes. An attachment strap, bracket or mechanism secures the heat transfer element in the vent hood that is typically tapered for effective heat gathering, and is positioned downstream of filters or traps for grease so as to avoid clogging the heat transfer element.
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公开(公告)号：US20220034521A1
公开(公告)日：2022-02-03
申请号：US16941744
申请日：2020-07-29
Applicant: Dipak R. Biswas
Inventor： Dipak R. Biswas
Abstract: A novel method is described for room heating using stored solar heat. Solar heat is stored in an insulated tank by using scrap and inexpensive heat absorbing or heat storing materials. Stored heat can then be extracted by air circulation for room heating. The temperature of the room air is controlled by a thermostat. When the room temperature drops below the set point on the thermostat, a circulating air pump turns on and extract the solar heat until the room temperature air reaches the desired set temperature. Once room temperature reaches the set point in the thermostat, the air circulation pump turns off.
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公开(公告)号：US20110093131A1
公开(公告)日：2011-04-21
申请号：US12589080
申请日：2009-10-19
Applicant: Dipak R. Biswas
Inventor： Dipak R. Biswas
IPC: G06F1/32
CPC classification number: F25D29/00 , F25B2600/0251 , F25D2600/02 , Y02B40/32
Abstract: The house hold appliances, such as refrigerators and freezers are usually turned on all day (24/7) long. They consume electricity throughout day and night. The flow of electricity through these appliances can be controlled for a finite period of time so that the food or other stored products are not going to be spoiled. The consumption of electricity can be reduced significantly by using a programmable timer or time switch. The programmable timer or time switch can be plugged into the wall and the power chord of the refrigerator or freezer can be plugged into the timer. The timer or time switch can be built-in to the appliances. The refrigerator or freezer with a built-in timer will control the flow of electricity by deliberately shutting of the power for a fixed period of time. A significant amount of energy can be saved by using the proposed method of deliberately shutting off the power for a fixed period of time using a timer or time switch which can be built-in to the appliances or they can be individual unit where the appliances can be directly plugged in.
Abstract translation: 家用电器，如冰箱和冷柜通常全天（24/7）长时间打开。 他们昼夜消耗电力。 通过这些器具的电流可以在有限的时间内进行控制，从而不会损坏食物或其他储存的产品。 通过使用可编程定时器或时间开关可以显着降低电力消耗。 可编程定时器或时间开关可以插入墙壁，冰箱或冷柜的电源线可以插入定时器。 计时器或时间开关可以内置到设备中。 具有内置定时器的冰箱或冷柜可以通过在一段固定的时间内故意关闭电源来控制电力的流动。 使用建议的方法可以使用建议的方法来节省大量的能量，该方法是使用定时器或时间开关故障关闭电源一段固定的时间，这些定时器或时间开关可以内置在电器中，也可以是设备可以单独使用的单元 直接插入
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公开(公告)号：US5337381A
公开(公告)日：1994-08-09
申请号：US7112
申请日：1993-01-21
Applicant: Dipak R. Biswas , Anpei Pan
Inventor： Dipak R. Biswas , Anpei Pan
CPC classification number: G02B6/3624 , A61N5/0601 , G02B6/0008 , A61B2018/2261 , Y10S385/901 , Y10S385/902
Abstract: A fiber optic, cylindrical, light diffuser for medical use includes an unclad distal fiber end where the exposed core end has a conical shape. The core end is enclosed by a sleeve which contacts the clad portion of the fiber only and defines a closed chamber with the distal end of the fiber. The chamber is filled with light diffusing material. The diffuser exhibits highly uniform output light distribution and is capable of carrying relatively high power densities safely.
Abstract translation: 用于医疗用途的光纤，圆柱形，光漫射器包括裸露的远端光纤端部，其中暴露的芯部端部具有圆锥形状。 芯端由仅与纤维的包层部分接触并且限定具有纤维远端的封闭室的套筒包围。 该室充满了光漫射材料。 扩散器表现出高度均匀的输出光分布，并且能够安全地承载相对较高的功率密度。
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10.发明授权
公开(公告)号：US4518628A
公开(公告)日：1985-05-21
申请号：US580280
申请日：1984-02-17
Applicant: Dipak R. Biswas , Dilip K. Nath
Inventor： Dipak R. Biswas , Dilip K. Nath
CPC classification number: C03C25/108 , C03C25/104 , C03C25/107 , C03C25/223 , C23C16/481
Abstract: An optical fiber which has just been drawn from an optical preform is provided with an external hermetic coating by using a heterogeneous nucleation thermochemical deposition technique. This technique involves passing the fiber through a reaction zone which contains a gaseous medium that includes a reactant which decomposes, or a mixture of reactants which chemically react, at a predetermined temperature to form the material of the coating. Only the fiber but not the gaseous medium surrounding the same is heated to the predetermined temperature, especially by directing radiation onto the exposed circumferential surface of the fiber, so that the decomposition or the chemical reaction takes place directly on the exposed surface of the fiber rather than in the gaseous medium, accompanied by simultaneous deposition of the coating material on the exposed surface of the fiber. The resulting fiber with hermetic coating can then be provided with an additional polymer coating layer. The apparatus for performing this technique includes a reactor including a transparent wall which circumferentially bounds a reaction chamber constituting the reaction zone, and a heating arrangement including two infrared radiation sources located externally of the transparent wall and each associated with a part-elliptical mirror which reflects the radiation toward the transparent wall and through the same onto the exposed surface of the fiber.
Abstract translation: 刚刚从光学预型件中拉出的光纤通过使用异相成核热化学沉积技术提供外部密封涂层。 该技术涉及使纤维通过反应区，该反应区含有气态介质，该气体介质包括分解的反应物或在预定温度下化学反应的反应物的混合物以形成涂层的材料。 特别是通过将辐射引导到纤维的暴露的周向表面上，只有纤维而不是包围其的气体介质被加热到预定的温度，使得分解或化学反应直接发生在纤维的暴露的表面上 与气态介质相比，伴随着涂层材料同时沉积在纤维的暴露表面上。 然后可以将所得到的具有气密涂层的纤维提供另外的聚合物涂层。 用于执行该技术的装置包括反应器，其包括周向地界定构成反应区的反应室的透明壁，以及包括位于透明壁外部的两个红外辐射源的加热装置，每个与部分椭圆镜相关联， 朝向透明壁的辐射，并通过光纤的暴露表面。
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