Abstract: Apparatus for treatment of humans with ultraviolet rays has one or more mercury lamps, Xenon lamps or other radiation sources and associated reflectors which establish a high-density radiation field in close proximity to the exit opening or openings. The radiation is filtered so that the body of a person located in the region of the high-density field is exposed only to rays in the range of 315 to 400 nanometers. The heat energy output of the radiation source or sources is sufficiently low to enable a person to stand long periods of uninterrupted exposure to radiation in the range of 315 to 400 nm so that a tanning effect can be achieved as a result of a single continuous exposure for a requisite interval of time. Alternatively, the apparatus is equipped with suitable heat absorbing and intercepting means, especially if the radiation source or sources are high-pressure mercury lamps or Xenon lamps.

Abstract: Apparatus for producing ultraviolet radiation, particularly a quick-tanning or therapeutic sunlamp, has a source of substantially uniform ultraviolet radiation, including at least two closely adjacent tubular low-pressure mercury lamps; an arrangement for intercepting at least the major percentage of wavelength bands of ultraviolet radiation below approximately 300 mm; and a reflector system cooperating with said source and defining at least one opening for the escape of ultraviolet radiation consisting essentially of the remaining wavelength band of ultraviolet radiation, said reflector system including for each of said lamps a trough-shaped reflector surrounding the lamp along an arc, and at least one intermediate portion between adjacent ones of said lamps and two lateral portions having zones which project forwardly of said intermediate portion and have forward edge portions defining said opening, the space between said lateral portions and forwardly of said intermediate portion being substantially unobst

Abstract: A method and device for machining the tappet collars of the inner rings of roller bearings by means of a frusto-conical cup wheel is proposed wherein such cup wheel is adjustable in the axial direction of the workpiece into engagement with the surface to be machined, is angularly adjustable about a remote axis perpendicular to the axis of the workpiece to provide for an adjustment in the inclination of the annular abrading surface of the cup wheel relative to the surface to be machined, and is supported for linear oscillating movement in a direction substantially parallel to the latter surface.

Abstract: A method of depositing an oil containing protective surface layer on a very thin metal sheet preferably intended for packing purposes. The very thin metal sheet, in the form of a band and at a band speed of up to 600 m/min, is electrostatically coated with a mixture comprising 1 to 2 parts of an ester of sebacic acid, azelaic acid, or citric acid, and 1 part of a high molecular monobasic acid having the general formula CH.sub.3 (CH.sub.2).sub.n CON(CH.sub.3)CH.sub.2 COOH. The coating is formed in a layer of 1 to 10 mg/m.sup.2 of surface of the metal sheet.

Abstract: Apparatus for treatment of humans with ultraviolet rays has one or more mercury lamps, Xenon lamps or other radiation sources and associated reflectors which establish a high-density radiation field in close proximity to the exit opening or openings. The radiation is filtered so that the body of a person located in the region of the high-density field is exposed only to rays in the range of 315 to 400 nanometers. The heat energy output of the radiation source or sources is sufficiently low to enable a person to stand long periods of uninterrupted exposure to radiation in the range of 315 to 400 nm so that a tanning effect can be achieved as a result of a single continuous exposure for a requisite interval of time. Alternatively, the apparatus is equipped with suitable heat absorbing and intercepting means, especially if the radiation source or sources are high-pressure mercury lamps or Xenon lamps.

Abstract: A sunlamp with one or more pairs of aligned sockets for the prongs of plugs which are secured to the end portions of a tubular source of ultraviolet radiation in the UVA range and the neighboring portion of the UVB range. The combined length of the source and plugs is between 440 and 450 mm so that the source cannot be inserted into the sockets of a standard lamp using tubular sources of fluorescent light. The souce is connected in circuit with a timer which interrupts the emission of ultraviolet radiation after a preselected interval of tanning.

Abstract: Apparatus for treatment of psoriasis has a housing with an exit opening located in front of a battery of elongated cylindrical low-pressure mercury lamps which emit ultraviolet radiation in the UVB and UVA ranges, with abrupt decrease of radiation intensity at the wavelength of approximately 330 nm. The envelopes of the lamps absorb radiation in the wavelength band below approximatey 295 nm. Each lamp is partially surrounded by a trough-shaped reflector which reflects radiation issuing from the rear half and from the sides of the respective lamp. The reflectors cause the radiation to form a high-intensity radiation field close to the exit opening of the housing. If the exit opening is located above the lamps, it is covered by a plate which transmits radiation between 300 and 330 nm and serves as a support for the body of a patient.

Abstract: A trough-shaped reflector for use with rod-shaped sources of ultraviolet radiation in sunlamps has a rear wall behind the source and two side walls which flank the source and define therewith two narrow gaps. The front portions of the side walls are parallel to each other and extend forwardly beyond the source. The front surface of the rear wall has two concave portions which reflect rays into the respective gaps, and the rear portions of the side walls have parallel, zig-zag shaped or concave inner surfaces. The reflector can be made of a rectangular blank of sheet metal by imparting to the median portion of the blank a semicylindrical shape, by notching the outer side of the median portion midway between the marginal portions of the resulting preform, and by notching the inner side of the median portion at both sides of the notch in the outer side.

Abstract: Apparatus for treatment of humans with ultraviolet rays has one or more mercury lamps, Xenon lamps or other radiation sources and associated reflectors which establish a high-density radiation field in close proximity to the exit opening or openings. The radiation is filtered so that the body of a person located in the region of the high-density field is exposed only to rays in the range of 315 to 400 nanometers. The heat energy output of the radiation source or sources is sufficiently low to enable a person to stand long periods of uninterrupted exposure to radiation in the range of 315 to 400 nm so that a tanning effect can be achieved as a result of a single continuous exposure for a requisite interval of time. Alternatively, the apparatus is equipped with suitable heat absorbing and intercepting means, especially if the radiation source or sources are high-pressure mercury lamps or Xenon lamps.