We claim:
1. In a vehicle designed for alternate travel on a roadway or railroad rails, said vehicle including a frame, a set of wheel assemblies oriented for engaging said roadway during roadway travel, and for engaging said rails during railroad travel, a set of rail wheel assemblies, and a rail wheel shifting mechanism operable to move the rail wheels between a tracking position in engagement with said rails for said railroad travel, and a retracted position for said roadway travel, the improvement which comprises a mounting assembly for at least certain of said rail wheels serving to orient the rotational axes of the associated rail wheels at an oblique angle relative to the horizontal with the inner margins of the upper ends of the rail wheels being inboard of the lower ends thereof adjacent the rails.
2. The vehicle of claim 1, said angle being less than 6.
3. The vehicle of claim 2, said angle being from about 1.5 to 4.
4. The vehicle of claim 2, said angle being about 3.
5. The vehicle of claim 1, said rail wheel set comprising two pairs of rail wheels, each of said rail wheels having a mounting assembly associated therewith.
6. The vehicle of claim 1, said wheel assemblies comprising pneumatic tires.
7. The vehicle of claim 1, said wheel assemblies being axially spaced from said rail wheels along the length of said vehicle.
8. The vehicle of claim 1, each of said certain rail wheels mounted on a fixed, obliquely oriented spindle.
9. The vehicle of claim 1, each of said certain rail wheels presenting a rim surface and a flange, said rim surface being substantially parallel with the rotational axes of the certain rail wheels.
10. The vehicle of claim 1, each of said certain rail wheels presenting a flange, there being a radius of curvature between the rim surface and flange, said radius of curvature being from about 0.3 to 0.5 inches.
11. The vehicle of claim 10, said radius of curvature being from about 0.350 to 0.425 inches.
12. The vehicle of claim 11, said radius of curvature being about 0.375 inches.
13. The vehicle of claim 1, said vehicle being a rail car mover.
14. The vehicle of claim 13, said rail car move including a frame, said rail wheels mounted on said frame for pivoting movement thereof between said tracking and retracted positions.
15. The vehicle of claim 13, there being two pairs of said rail wheels, a forward pair and a rearward pair, there being two pairs of said wheel assemblies located between said forward and rearward rail wheels pairs.
16. The vehicle of claim 1, said mechanism comprising a piston and cylinder assembly associated with each of said rail wheels.
17. A rail wheel assembly comprising:
a pair of laterally spaced apart rail wheels each designed to travel upon a railroad rail; and
a mounting assembly for each of said rail wheels including an elongated spindle defining the rotational axis of the associated rail wheel, said axes being oblique relative to the horizontal and less than 6 so that the inner margins of the upper ends of the rail wheels are inboard of the lower ends thereof adjacent the rails,
the angular relationship between each spindle and the associated rail wheel being fixed,
said rotational axes being fixed when said rail wheels are traveling on said rails.
18. The assembly claim 17, said angle being from about 1.5 to 4.
19. The assembly of claim 18, said angle being about 3.
20. The assembly of claim 17, each of said rail wheels presenting a rim surface and a flange, said rim surface being substantially parallel with the rotational axis of the associated rail wheel.
21. The assembly of claim 17, each of said rail wheels presenting a rim surface and a flange, there being a radius of curvature between the rim surface and flange, said radius of curvature being from about 0.3 to 0.5 inches.
22. The assembly of claim 21, said radius of curvature being from about 0.350 to 0.425 inches.
23. The assembly of claim 22, said radius of curvature being about 0.375 inches.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-17. (Cancelled)
18. A video moving object detecting apparatus comprising:
a video decoder which decodes encoded data obtained by compression-encoding a motion video signal;
a determination unit configured to determine whether a video signal corresponding to a unit area represents a background area or a non-background area, the video signal being part of a reconstructed video signal acquired by the video decoder;
a detection unit configured to detect an area of a moving object from a result of the determination done by the determination unit for each unit area;
a display which displays information indicating the area of the moving object, determined by the determination unit, on a display screen for the reconstructed video signal;
a first cross correlation calculator which computes a cross correlation value between a current frame of the reconstructed video signal and a video signal preceding by one frame every unit area;
a storage section which stores a background video signal corresponding to a background component of the reconstructed video; and
a second cross correlation calculator which computes a second cross correlation value between the current frame of the reconstructed video signal and the background video signal stored in the storage section every unit area;
wherein the determination unit is configured to determine whether the video signal in the unit area is a background area or a non-background area on the basis of encoding mode information obtained from the video decoder section, the first cross correlation value and the second cross correlation value.
19. The apparatus according to claim 18, further comprising an update unit configured to, when the determination unit determines that the video signal in the predetermined unit area of the reconstructed video signal represents a background area, update the background video signal stored in the storage with the video signal in the unit area which has been determined as representing the background area.
20. (Cancelled)