1. A crane, in particular a bridge crane or gantry crane, said crane comprising at least one crane girder that extends horizontally and is designed as a truss with a plurality of braces, on which girder a crane trolley with a lifting gear is movable, wherein at least some of the braces are designed having a flat shape, wherein the flat-shaped braces each have a planar main surface that extends in each case transversely with respect to a longitudinal direction of the crane girder, wherein the flat-shaped braces have an elongated shape with longitudinal sides, and comprise in the region of their longitudinal sides in each case at least one folded auxiliary surface that adjoins the main surface, wherein the at least one auxiliary surface points transversely with respect to the longitudinal direction of the crane girder, the braces having opposite brace ends, and wherein the auxiliary surfaces are arranged outside the brace ends and the length of the auxiliary surface is in a range of about 40% to 70% of the total length of the respective brace.
2. The crane of claim 1, wherein all of the braces of the crane girder are designed having a flat shape.
3. The crane of claim 1, wherein the main surfaces of the braces extend over at least half the width of the crane girder.
4. The crane of claim 1, wherein the braces, as seen in the direction of their longitudinal axis, have an L-, U- or Z-shaped cross-section as seen at the level of their auxiliary surfaces.
5. The crane of claim 1, further comprising lower and upper recesses in the main surfaces of the braces on their longitudinal sides, and an aperture provided on a lower narrow side of the braces, which apertures are arranged in each case in the region of a first or second brace end.
6. The crane of claim 5, wherein the auxiliary surfaces are arranged between the lower and upper recesses.
7. The crane of claim 1, wherein the crane girder comprises at least one upper boom that extends in a linear manner in the longitudinal direction thereof, and wherein the crane girder further comprises at least one lower boom arranged in parallel therewith, wherein the upper boom and the lower boom are connected to one another by a plurality of the braces arranged along the longitudinal direction of the crane girder.
8. The crane of claim 7, wherein the upper boom and the lower boom are connected to one another by a plurality of posts arranged along the longitudinal direction of the crane girder.
9. The crane of claim 8, wherein each of the posts is arranged next to at least one brace, wherein each of the braces forms with the corresponding post a setting angle of the same size.
10. The crane of claim 8, wherein the posts are designed having a flat shape.
11. The crane of claim 1, wherein the crane comprises two crane girders that are arranged in parallel and at a spaced interval from one another.
12. The crane of claim 8, wherein the flat-shaped braces and the posts are fastened to the upper boom and the lower boom by weld seams, wherein the weld seams are arranged exclusively on the longitudinal sides of the respective main surfaces.
13. The crane of claim 8, wherein the upper boom and the lower boom each have mutually facing limbs and the braces and the posts are welded exclusively to the inner sides of the limbs.
14. The crane of claim 6, wherein the crane girder comprises at least one upper boom that extends in a linear manner in the longitudinal direction thereof, and wherein the crane girder further comprises at least one lower boom arranged in parallel therewith, wherein the upper boom and the lower boom are connected to one another by a plurality of the braces arranged along the longitudinal direction of the crane girder.
15. The crane of claim 14, wherein the upper boom and the lower boom are connected to one another by a plurality of posts arranged along the longitudinal direction of the crane girder.
16. The crane of claim 15, wherein each of the posts is arranged next to at least one brace, wherein each of the braces forms with the corresponding post a setting angle of the same size.
17. The crane of claim 16, wherein the posts are designed having a flat shape.
18. The crane of claim 17, wherein the crane comprises two crane girders that are arranged in parallel and at a spaced interval from one another.
19. The crane of claim 18, wherein the flat-shaped braces and the posts are fastened to the upper boom and the lower boom by weld seams, wherein the weld seams are arranged exclusively on the longitudinal sides of the respective main surfaces.
20. The crane of claim 19, wherein the upper boom and the lower boom each have mutually facing limbs and the braces and the posts are welded exclusively to the inner sides of the limbs.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A panoramic scene storage device comprising a convex reflector, and image capturing means, wherein the convex reflector and image capturing means are circumscribed by a generally cylindrical housing, said housing comprised of a movable housing subassembly, and a stationary housing subassembly, and further comprising extending means for extending said movable housing subassembly from a retracted position to an extended position, said movable housing subassembly composed of a photochromic material, whereby the housing darkens when exposed to ultraviolet light.
2. The panoramic scene storage device of claim 1, further comprising at least one ridge circumscribing the interior of the stationary housing subassembly, whereby said ridge makes contact with the movable housing subassembly serving to clean said movable housing subassembly as it is moved past said ridge.
3. The panoramic scene storage device of claim 1, further comprising one or more air holes in the base of the stationary housing subassembly, whereby at least one air hole is connected to an air conduit from a vacuum system, said vacuum system providing the extending means for moving the movable housing subassembly.
4. The panoramic scene storage device of claim 3, comprising, a stop ridge circumscribing the interior of the stationary housing subassembly, an upper ridge circumscribing the interior of the stationary housing subassembly, and a support lip circumscribing the movable housing subassembly at its base, whereby the support lip travels beyond the upper ridge, and contacts the stop ridge to limit travel in the direction of the extended position as to bound the support lip between the upper ridge and the stop ridge.
5. The panoramic scene storage device of claim 4, further comprising, a lower ridge circumscribing the interior of the stationary housing subassembly, whereby the support lip travels beyond the lower ridge, and contacts the base of the stationary housing subassembly as to limit the travel in the direction of the retracted position as to bound the support lip between the lower ridge and the base of the stationary housing subassembly.