Patent Number: 047120142
Section: description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a radiation lamp provided with a housing 1, as used in conjunction with a control unit (not shown here). The housing is seen from the front or patient side, but has an almost semi-circular cross-section. The individual elements of the radiation lamp are only indicated chematically as they are not important to the invention. Concave reflectors 3 are disposed in large circular openings, covered by a screen 2. Light-orange radiation lamps are arranged at the focal point areas of the concave reflectors. The latter are highly-polished, and the openings in the screen are designed in such a way that the radiation reflected by the concave reflector surfaces can emerge unobstructed. At the second and fourth positions designated by reference numerals 5 and 6, a UV-B and a UV-C lamp 9 and 10 are arranged on each of the bases 7 and 8. Mirrors are disposed behind the UV lamps, shielding them to the rear. A drive system 11 is provided for these lamp positons, in this case consisting of one drive motor 12 with a drive disk 13 and drive arms 14. This drive system will be explained in more detail. FIG. 2 shows there is an arrangement similar to that in FIG. 1, whereby the same elements are again provided with the same reference numerals. In this case two separate drive systems are provided, each with one drive motor 12a, 12b and a drive dish 13a, 13b. However, these individual systems function in the same way. FIG. 3 shows the individual features of the FIG. 1 drive system. The drive motor 12 continuously rotates the drive disk 13. Two drive arms 14 are eccentrically coupled to the disk, and act as pushers on slip couplings 16 lying in continuous grooves 15 of the corresponding bases 7 and 8. The driving force of the slip couplings 16 can be finely adjusted using an adjusting screw 17. An end switch 18 is also provided, and is actuated by a roller 20 entering a stop groove 19. FIG. 4 shows the drive arrangement from the side. One of the drive arms in FIGS. 3 and 4 is dispensed with when two separate drive systems in accordance with FIG. 2 are provided. It is important that the swivel movement or pivotal reciprocation of the lamps is only 90.degree., i.e. 45.degree. to both sides, seen in the longitudinal direction of the radiation lamps. The lamps in positions 5 or 6 can be manually adjusted to any position by means of the slip couplings 16. If the drive system is switched on and both lamp units are not in the same rotational position, the left drive mechanism, which can be seen in FIG. 3, remains in its end position due to the slippage of its coupling 16 until the right drive mechanism has reached the same position. From this point on, both lamp units move completely uniformly and synchronously. This mode of operation is ensured by the end switch 18, the stop groove 19, and the roller 20 entering the stop groove. With such a construction it is possible, for example, to set one lamp unit for a certain direction and to initially leave the other lamp unit fixed, swivveling it afterwards. It is also possible to swivel both lamps alternately under program control, or to stop them in a certain position. This new arrangement means that the application possibilities for treatment of large-area skin damage are decisively improved.