| 摘要 |
1,003,416. Illuminating working surfaces. QUARZLAMPEN G.m.b.H. March 30, 1962 [March 30, 1961], No. 12348/62. Heading F4R. Apparatus for producing concentrated illumination of a selected region of a planar surface consists of a plurality of spotlights each mounted for rotation about a point on its optical axis and a control linkage connected to each spotlight by a control lever whose longitudinal axis passes through the point of rotation of the spotlight, all the levers being moved in concert by movement of the control linkage in such a manner that the distance between the initial and final points at which the axis of a control lever cuts a plane parallel to the surface and equidistant from the points of rotation of all the spotlights is equal for all the spotlights so that throughout the range of adjustment of the apparatus to illuminate a selected region of the surface the light beams from all the spotlights will converge in the selected region. In an apparatus for illuminating an operating table, seven spotlights 11-17, Fig. 6, are mounted in the form of a cross in a housing 18 in the ceiling of the operating theatre and are connected together by a linkage 19, the axes of the spotlights intersecting at a point a little way above the surface of the table. Each spotlight consists of a parabolic reflector 34, Fig. 4, with a half-mirrored lamp 36 mounted at its focal point and closed in front by a heat filter 37. Each spotlight is carried by a Cardan suspension consisting of a stirrup supporting the spotlight and pivoted in a frame pivoted in a second stirrup carried by a fused part of the apparatus, the pivotal axes of the stirrups being at right angles. Each spotlight is connected by a lever 26 to a linkage 19 consisting of two pairs of rails at right angles carrying universal couplings having sleeves which slidably engage the levers 26. The linkage 19 is guided by rollers 28 in bearing blocks 27 carried by rollers 29 on guide rails 31 and is moved by motor 32, 33 acting on toothed racks 42. At least one spotlight is arranged with its axis at a small angle to the plane of the surface to be illuminated. If desired, a photographic kinematograph or television camera or an X-ray apparatus may be coupled with the linkage so that its optical axis passes through the centre of the selected region.
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