Abstract: A method of producing a quartz glass crucible for pulling a single crystal comprising: providing a melting mold comprising a wall having passages between outside and inside; providing an outer layer granulation consisting of first coarser SiO2 particles and forming an outer granulation layer from the outer layer granulation on the inside of the melting mold wall; providing a barrier layer granulation consisting of second finer SiO2 particles and forming a barrier granulation layer from the barrier layer granulation on the outer granulation layer; applying a negative pressure to the outside of the melting mold wall; and heating the barrier granulation layer and the outer granulation layer with formation of a quartz glass crucible with transparent inner layer.

Abstract: The invention relates to a method for producing a blank mold from synthetic quartz glass by using a plasma-assisted deposition method, according to which a hydrogen-free media flow containing a glass starting material and a carrier gas is fed to a multi-nozzle deposition burner. The glass starting material is introduced into a plasma zone by the deposition burner and is oxidized therein while forming SiO2 particles, and the SiO2 particles are deposited on a deposition surface while being directly vitrified. In order to increase the deposition efficiency, the invention provides that the deposition burner (1) focuses the media flow toward the plasma zone (4) by. A multi-nozzle plasma burner, which is suited for carrying out the method and which is provided with a media nozzle for feeding a media flow to the plasma zone, is characterized in that the media nozzle (7) is designed so that it is focussed toward the plasma zone (4). The focussing is effected by a tapering (6) of the media nozzle (7).

Abstract: A known method for producing a hollow cylinder of synthetic quartz glass comprises the steps of: (a) providing an inner tube of synthetic quartz glass having an inner bore defined by an inner wall, (b) cladding the inner tube (3?) with an SiO2 soot layer (4?), and (c) sintering the SiO2 soot layer with formation of the hollow cylinder. Starting therefrom, to indicate a method in which on the one hand the sintering process is completed before the hollow cylinder is further processed together with the core rod, and in which on the other hand a complicated machining of the inner bore of the hollow cylinder of quartz glass is not required, the invention suggests that during sintering the surface temperature of the inner wall of the inner tube should be kept below the softening temperature.

Abstract: A power supply system comprises an electrical power generating device producing DC electrical power in the form of a DC electrical current, a DC current conductor receiving the DC electrical current from the electrical power generating device and carrying the DC electrical current to a socket, and an AC power system transmitting AC electrical current to the socket so that the socket can be accessed by a plug inserted therein to receive the DC current or the AC current from it. The socket has four recesses in it, and each recess has a respective contact therein. Each recess is configured to receive a respective prong and make a respective electrical contact with the plug therein. A first of the contacts transmits the DC current, a second and third of the contacts transmit complementary poles of the AC electrical current, and a fourth contact connects with a grounded connection. A DC-powered electrical device has a plug with a plug body and three prongs supported on and extending from the plug body.

Abstract: A one-piece back support apparatus comprises a belt portion being configured to provide back and abdominal support encircling a wearer's waist and a compression pants portion. The belt portion has a front portion, a back portion, a top portion, a bottom portion and an inner surface. The compression pants portion secured to the belt is configured to provide support for the wearer's pelvis, legs, and groin area. The inner surface of the belt has one or more pack support portions with slots for receiving one or more gel packs so as to maintain contact between the gel packs and the wearer's back. Slots in the belt portion may accommodate vertically extending inserts of rigid plastic to reinforce the belt portion over the lumbar region of the wearer.

Abstract: A known method for producing a cylinder of quartz glass comprises a soot depositing process, in which SiO2 particles are deposited on an elongate carrier rotating about an axis of rotation with formation of a porous, hollow-cylindrical soot body, and a sintering process in which the soot body comprising an inner bore with inner wall, a longitudinal axis, an upper end and a lower end is held suspended in vertical orientation in a furnace, a holding element being provided for holding purposes, which projects from the upper end into the inner bore of the soot body and acts on a bearing provided in the inner bore.

Abstract: A known method for producing synthetic quartz glass comprises the method steps: (a) forming a cylindrical SiO2 soot body having an inner portion and at least one free cylinder jacket surface surrounding the inner portion; (b) thermally drying the porous soot body; and (c) vitrifying the dried soot body with formation of the cylinder from synthetic quartz glass.

Abstract: To provide a method for the inexpensive manufacture of a deposition burner with small manufacturing tolerances for use in the synthesis of quartz glass, and wherein moreover, when the deposition burner is used as intended, the risk of contamination of the quartz glass to be produced is low, the invention suggests the following method steps: (a) providing a start cylinder of quartz glass (40) which is mechanically provided with longitudinal bores (46, 47); (b) elongating the start cylinder with formation of a burner strand (42), the longitudinal bores being shaped as elongated channels extending in parallel with one another; (c) cutting the burner strand into pieces in the form of cylindrical quartz glass blocks (43), each being provided with passage lines extending in parallel with a central axis of the quartz glass block; and (d) manufacturing the deposition burner by using a respective one of such quartz glass blocks as burner head which has a proximal end and a distal end, the passage lines serving the sup

Abstract: SiO2 slurry for the production of quartz glass contains a dispersion liquid and amorphous SiO2 particles with particle sizes to a maximum of 500 ?m. The largest volume fraction is SiO2 particles with particle sizes of 1 ?m-60 ?m, as well as SiO2 nanoparticles with particle sizes less than 100 nm constituting 0.2-15% volume by weight of the entire solids content. To prepare the slurry for use and optimize its flow behavior for later processing by dressing or pouring the slurry mass, and for later drying and sintering without cracks, the slurry has SiO2 particles with a multimodal distribution of particle sizes, with a first maximum in the range 1 ?m-3 ?m and a second maximum in the range 5 ?m-50 ?m, and an 83%-90% solids content by weight of the SiO2 particles and the SiO2 nanoparticles together.

Abstract: A power supply system comprises an electrical power generating device producing DC electrical power in the form of a DC electrical current, a DC current conductor receiving the DC electrical current from the electrical power generating device and carrying the DC electrical current to a socket, and an AC power system transmitting AC electrical current to the socket so that the socket can be accessed by a plug inserted therein to receive the DC current or the AC current from it. The socket has four recesses in it, and each recess has a respective contact therein. Each recess is configured to receive a respective prong and make a respective electrical contact with the plug therein. A first of the contacts transmits the DC current, a second and third of the contacts transmit complementary poles of the AC electrical current, and a fourth contact connects with a grounded connection. A DC-powered electrical device has a plug with a plug body and three prongs supported on and extending from the plug body.

Abstract: In a known method for machine-cutting a plate-shaped workpiece, position and/or geometry and/or dimensions of the workpiece are detected without contact by means of a camera and the corresponding data are subjected to an evaluation by means of image processing. Starting from this, to permit a precise and reproducible detection of the position and/or geometry and/or dimensions of the workpiece to be treated without spending a lot of time, it is suggested according to the invention that the recording of the data should comprise a method step for the coarse localization of a workpiece edge, in which the camera is operated in a first operative mode with lower optical resolution, and a second method step for determining the exact positional data of the found workpiece edge, in which the camera is operated in a second operative mode with higher optical resolution.

Abstract: In a conventional method for the production of an optical component made from quartz glass, a coaxial arrangement with a core rod, surrounded by a quartz glass envelope tube comprising an evacuable inner drilling, is introduced in the vertical direction into a heating zone, softened therein by sections and, with formation of a drawing bulb, elongated to give the quartz glass component. According to the invention, a simple and cheap method based on the above, permitting the production of high-grade optical components by elongation of a coaxial arrangement of core rod and an enveloping tube with great economy, may be achieved, whereby a core rod is used, comprising at least two separate core rods arranged one above the other in the inner drilling and the weight of an upper core rod section is taken by a mounting or support region of the enveloping tube, provided above the drawing bulb.

Abstract: An adjustable support device (10) for a structure, including an arcuate support bar (26) terminating in feet (28) for engagement with a ground surface. Two spaced apart locking mechanisms (30) are pivotally connected to the structure. The arcuate support bar (26) extends between engagement rods (36a, 36b) of the locking mechanisms (30). The locking mechanisms (30) are pivotally moveable between a first position, in which a stop member (38) prevents further pivotal movement in one direction such that the engagement rods (36a, 36b) are positioned to allow the arcuate support bar (26) to slide freely over the engagement rods (36a, 36b), and a second position, when weight is applied to the locking mechanisms (30). In the second position, the engagement rods (36a, 36b) lock against the arcuate support bar (26) to prevent sliding movement there through for supporting the structure in a required orientation.

Abstract: A mixed quartz powder contains quartz powder and two or more types of doping element in an amount of from 0.1 to 20 mass %. The aforementioned doped elements include a first dope element selected from the group consisting of N, C and F, and a second dope element selected from the group consisting of Mg, Ca, Sr, Ba, Sc, Y, Ti, Zr, Hf, the lanthanides and the actinides. The “quartz powder” is a powder of crystalline quartz or it is a powder of glassy SiO2 particles. It is made form natural occurring quartz or it is fabricated synthetically. The “quartz powder” may be doped. The compounding ratio of the total amount (M1) of the aforementioned first elements and the total amount (M2) of the aforementioned second elements as the ratio of the number of atoms (M1)/(M2) is preferably from 0.1 to 20. Al as well as the aforementioned doped elements is preferably included in a mixed quartz powder of this invention.

Abstract: A known SiO2 slurry for the production of quartz glass contains a dispersion liquid and amorphous SiO2 particles with particle sizes to a maximum of 500 ?m, wherein the largest volume fraction is composed of SiO2 particles with particle sizes in the range 1 ?m-60 ?m, as well as SiO2 nanoparticles with particle sizes less than 100 nm in the range 0.2-15% volume by weight (of the entire solids content). In order to prepare such a slurry for use, and to optimize the flow behavior of such a slurry with regard to later processing by dressing or pouring the slurry mass, and with regard to later drying and sintering without cracks, the invention suggests a slurry with SiO2 particles with a multimodal distribution of particle sizes, with a first maximum of the sizes distribution in the range 1 ?m-3 ?m and a second maximum in the range 5 ?m-50 ?m, and a solids content (percentage by weight of the SiO2 particles and the SiO2 nanoparticles together) in the range 83%-90%.

Abstract: According to an aspect of the invention, a system for providing immersive surveillance a site has a plurality of cameras each producing a respective raw video of a respective portion of the site. A processing component receives the raw video from the cameras and generates processed video from it. A visualization engine is coupled to the processing system, and receives the processed video therefrom. The visualization engine renders real-time images corresponding to a view of the site in which at least a portion of the processed video is overlaid onto a rendering of an image based on a computer model of the site. The visualization engine displays the images in real time to a viewer. The processing component comprises first and second filter modules. The second filter module processes video received as output from the first filter module. A controller component controls all transmission of data and video between the first and second filter modules.

Abstract: In a known method for producing a tube of quartz glass by elongating a hollow cylinder of quartz glass having an outer diameter AD, said cylinder is continuously supplied to a heating zone with a vertically oriented heating tube having an inner diameter d, with the proviso that the diameter ratio d/AD is set to a value ranging from 1.02 to 1.7. The hollow cylinder is softened therein zonewise, and a tubular strand is drawn off from the softened region and shortened to obtain the tube. Starting therefrom, in order to optimize the dimensional stability of the quartz glass tube obtained, it is suggested according to the invention that the heating zone should have a length L which is set such that the ratio L/d is smaller than 0.9.

Abstract: Device for dewatering and drying solids, especially plastics granulated under water, in form of a centrifuge dryer comprising a housing (1) having an inlet opening (2) for the solid material with adhering water and an outlet opening (3) for the dehydrated solid material, a screen cylinder (4) fixedly disposed inside the housing (1), a rotor (5) arranged inside the screen cylinder (4) and wings (6) attached to the rotor at a distance from one another, a water drain (7), and arrangements (8, 8?) for the introduction and removal of an air stream passing vertically through the device. It is distinguished on the one hand in that the inlet opening (2) is arranged tangential to the screen cylinder (4, 10).

Abstract: The invention starts from a known component of quartz glass for use in semiconductor manufacture, which component at least in a near-surface region shows a co-doping of a first dopant and of a second oxidic dopant, said second dopant containing one or more rare-earth metals in a concentration of 0.1-3% by wt. each (based on the total mass of SiO2 and dopant). Starting from this, to provide a quartz glass component for use in semiconductor manufacture in an environment with etching action, which component is distinguished by both high purity and high resistance to dry etching and avoids known drawbacks caused by co-doping with aluminum oxide, it is suggested according to the invention that the first dopant should be nitrogen and that the mean content of metastable hydroxyl groups of the quartz glass is less than 30 wtppm.

Abstract: This method for drawing a quartz glass optical component shortens the pulling process and minimizes loss of material. An end face of a quartz glass hollow cylinder forms a tapered end portion to an attachment piece of quartz glass having a bore. The inner bore of the hollow cylinder and the bore of the attachment piece are at least temporarily interconnected fluidically as a passage bore. A cleaning fluid is passed through the inner bore of the hollow cylinder and the passage bore. A core rod of quartz glass, which rests on a contact surface of the attachment piece, is inserted into the inner bore of the hollow cylinder, and the hollow cylinder is continuously supplied to a heating zone, heated therein so as to form a drawing bulb, and the component is continuously drawn therefrom.