Abstract: To provide a continuous spectral output within the visible right range, particularly for spectroscopic and photometric purposes, the lamp has a fill of nitrogen and xenon mixed of N.sub.2 : Xe of 6:1 to 1:1, by volume, with an overall filling pressure in the range of 50 to 200 mbar, preferably at a mixing ratio of 4:1 with an overall fill pressure of 100 mbar.

Abstract: To permit economical attachment of a socket end to the press of a lamp, the socket is made of a deformable synthetic plastic material, for example Teflon PFA, the socket having concentric cylindrical surfaces and being of cup shape, and the lamp press having rectangular cross section, the socket being heated to softening temperature and the lamp press to melting temperature of the socket material and then inserted into the cup-shaped socket to permit instantaneous melting andflowing of the socket material around the edges of the rectangular press, and thus seat the socket on the press end. The socket is preferably preheated in a metal mold block, and the press by a flame directed towards the end press of the lamp from a side remote from that of the electrical connection to the lead-through of the press.

Abstract: A pivot support element is fixed in position to extend essentially vertically, and carries a horizontally projecting pivot pin. The movable pivotable member on which the weight is suspended is pivoted and connected to the pin by means of a plate-like pivot rod secured laterally to the pivotable member, so that the pivot pin will form the pivot axis for the plate-like element. The pivot pin additionally has fixedly attached thereto a link element, such as a short plate-like member to which a balance rod is pivotally attached which is connected with an intervening spring, typically a compression spring, to the weight-supporting member. Two plate-like pivot rods may be used, one on either side of the support member to provide for balanced attachment. The entire assembly is readily encapsulated in shell-like housing halves, to be essentially dust and contamination-proof, with minimum handling in assembly, or for cleaning and maintenance.

Abstract: A gas discharge lamp is disclosed which has a generally straight, tubular configuration and exhibits an approximately constant irradiation power along a greater portion of its length than previous lamps. This feature is achieved by forming the radiation body of the lamp into three sections along its length, a central sectors and two end sectors, wherein the central sector has different cross section than the two end sectors. In one embodiment, the central sector has a larger cross section than either of the end sectors.

Abstract: The present invention relates to a surgical operating lamp with mainly cold light radiation, whereby the infrared part of the light radiation from a light source is reflected by means of a concave cold light reflector and by an infrared reflector in the lamp area which reflects the infrared rays toward a heat absorbing body surrounding the lamp body. An outer bell, surrounds said heat absorbing body and forms a space therebetween to allow the passage of air therethrough to facilitate the cooling of the heat absorbing body.

Abstract: A temperature control system for the fluid in a textile dyeing vat 10. Collimated light from a single source 18 is passed through a transparent section 14 of a shunt tube 12 coupled to the vat, and through a transparent, movable, wedge-shaped container 28 filled with a reference dyeing fluid. The emerging light intensities are detected by photocells 24, 36 whose outputs are fed to differential amplifiers 38, 40. The output of the former controls the movement of the container 28 which the output of the latter controls the temperature of the vat through a valve device 46.

Abstract: This invention relates to a testing apparatus for light- and weather-resisting properties, with a sample room having a gas discharge radiator arranged therein, as well as to a mirror placed between this radiator and the samples, selectively reflecting the infrared portion of the radiation and being permeable to the visible and ultraviolet portion thereof, and to an additional mirror, selectively reflecting the visible and the ultraviolet portion of the radiation and transmitting the infrared portion thereof.

Abstract: A device for measuring the irradiation energy impinged upon a target within a fixed period, having a photo-electric receiver impacted by irradiation. Such devices have become known by the designation "Lux hour meter". They are used, e.g. for tests, by which the influence of irradiation energy on the properties of materials, e.g. textiles, shall be determined.

Abstract: An illumination system for an operating theater having a pinpointing spotlamp and several individual satellite spotlamps all of which are pivotable independently of each other in two mutually-perpendicular directions. The pinpointing spotlamp is adjustable to select a desired area to be illuminated, and each satellite spotlamp is provided with a photoelectric servomechanism which operates in response to light from the area illuminated by the pinpointing spotlamp to adjust the associated satellite spotlamp.